Diamond Certified Companies are Rated Highest in Quality and Helpful Expertise.

  • Why this rating is the most accurate.
  • Our editors gather deep company info.
  • Performance is Guaranteed.

Diamond certified companies are top rated and guaranteed

Why Trust Diamond Certified Auto Machine Shop Rated Highest in Quality?

You are the customer. If your goal is to choose an auto machine shop that will deliver high customer satisfaction and quality, you’ll feel confident in choosing a Diamond Certified auto machine shop. Each has been rated Highest in Quality in the most accurate ratings process anywhere. And you’re always backed by the Diamond Certified Performance Guarantee. Here’s why the Diamond Certified ratings and certification process will help you find a top rated auto machine shop and is unparalleled in its accuracy, rigor and usefulness:

1) Accuracy: All research is performed by live telephone interviews that verify only real customers are surveyed, so you'll never be fooled by fake reviews.

2) Statistical Reliability: A large random sample of past customers is surveyed on an ongoing basis so the research results you see truly reflect a Diamond Certified company’s top-rated status.

3) Full Disclosure: By clicking the name of a company above you'll see the exact rating results in charts and read verbatim survey responses as well as researched articles on each qualified company.

4) Guaranteed: Your purchase is backed up with mediation and the Diamond Certified Performance Guarantee, so you can choose with confidence.

Click on the name of a Diamond Certified company above to read ratings results, researched articles and verbatim customer survey responses to help you make an informed decision.

More than 200,000 customers of local companies have been interviewed in live telephone calls, and only companies that score Highest in Quality in customer satisfaction–a 90+ on a 100 scale–as well as pass all of the credential-based ratings earn Diamond Certified. By requiring such a high score to qualify, the Diamond Certified program eliminates mediocre and poorly performing companies. Read detailed information about the ratings and certification process.

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SELECTED PHOTOS FROM THESE TOP RATED COMPANIES

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INDUSTRY INFORMATION AND RESEARCHED ARTICLES BY THE DIAMOND CERTIFIED RESOURCE

INDUSTRY INFORMATION - Sonoma County – Auto Machine Shop

These associations and agencies may have more information about auto machine shops in your area, choosing an auto machine shop or auto machinist, and getting the best service from local automotive machine shops.

Engine Builders Association (AERA) (http://www.aera.org)
Automotive Parts Remanufacturers Association (APRA) (www.apra.org)
International Federation of Engine Remanufactures and Rebuilders (FIRM) (http://www.firm-org.eu)
Automotive Aftermarket Industry Association (AAIA) (http://www.aftermarket.org)
Automatic Transmission Rebuilders Association (ATRA) (http://www.atra.com)
Automatic Transmission Service Group (ATSG) (http://www.atsgmiami.com)
Be Car Care Aware (http://www.carcare.org)
The Engine Repower Council (ERC) (http://enginerepower.org)
Global Automotive Aftermarket Symposium (GAAS) (http://www.globalsymposium.org/index.shtml)
National Institute for Automotive Service Excellence (ASE) (http://www.ase.com)
The Remanufacturing Institute (TRI) (http://www.reman.org)
Society of Automotive Engineers (SAE) (http://www.sae.org)
Specialty Equipment Market Association (SEMA) (http://www.sema.org)
California Department of Consumer Affairs (DCA) (www.dca.ca.gov)

Know What You Want
What to Ask Yourself Before Hiring a Local Auto Machine Shop

What are you looking for in an auto engine machine shop? The answers are different for every consumer, but your answer to that question will help guide you to the best Sonoma County machining shop for your needs.

Start by writing down your wants and needs so that you have a clear picture of what you're looking for in a good shop. Then, when it comes time to interview local machining shops, you'll better know what questions to ask.

A sample list of questions is below.

  1. Do I want a Diamond Certified automotive machine shop that is rated best in quality and backed by the Diamond Certified Performance Guarantee?
  2. How do I use my vehicle most of the time (normal driving, autocross, drag racing, high-performance, street racing, etc.)?
  3. What is the final outcome I'm hoping for? (This may be a rebuilt engine, a faster vehicle, a vehicle with better performance, engine repairs, etc.)
  4. Do I have a preference of working with a one-person auto machine shop, or do I want a large shop with potentially larger capabilities?
  5. Do I want a shop that's close to my home or work (located in Cotati, Windsor, Petaluma, Santa Rosa, Rohnert Park, Guerneville and Healdsburg, Cazadero, Camp Meeker, Bloomfield, Temelec, Stewarts Point Rancheria, Schellville, Two Rock, Jenner, Eldridge, Fetters Hot Springs or another area), or am I willing to travel a certain distance to a great auto machine shop?
  6. What is my budget for auto engine machining services?
  7. What personal and professional characteristics am I looking for from my Sonoma County auto machine shop and machinists?
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What To Ask In Person
Talk with Machine Shop Personnel Before Making Your Decision

The next step is to visit some of the Sonoma County machine shops you're choosing among to get a feel for their shop, their employees, and the way they treat their customers.

As always when dealing with a business, it's polite to make an appointment so that you know there will be someone available with whom you can talk and that the timing is convenient for the shop. Some days and times are busier than others at Sonoma County automotive machine shops, and you want to make sure you get the attention you deserve.

Visit the shop at the appointed time and look for some common-sense signs that it's a good shop for you. Is it clean? Obviously, auto machine shops won't be spotless, but you can expect them to be tidy, well-lit and organized. Is the shop packed with parts, or does it look organized? Does the machining equipment look like it's cared for? Again, you will see some wear and tear, but you should also see signs of care and respect for the materials and equipment. Is the staff friendly and welcoming? Do they obviously care about your needs?

You may also want to ask some questions of the staff or representatives at this point. Here are some sample questions:

  1. How busy is your shop?
  2. How quick is your turn-around time?
  3. How do you price your work (time and materials or by the job)?
  4. Who will be working on my engine or transmission?
  5. What expertise and experience do they have on vehicles like mine?
  6. What will you need from me to start and complete my engine machining work?
  7. What is your approach to customer service?
  8. Will you contact me right away if my job is more complicated than you originally thought or you need additional work authorizations?
  9. Do you provide written warranties?
  10. What do they cover and how long are they in effect? Are they prorated, or do they expire on a specific day or mileage?
  11. Do you provide courtesy vehicles for customers in Guerneville, Santa Rosa, Sebastopol, Cotati, and Cloverdale or Agua Caliente, Asti, Bodega Bay, Duncans Mills, Glen Ellen, Monte Rio, Penngrove, Rio Nido, Roseland, Sheridan, the Geysers, Villa Grande? (Courtesy vehicles are less likely at auto machine shops than general auto repair shops, it may be harder to secure this service. You may need to plan for your own alternative transportation, but it can't hurt to ask.)
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  • What To Ask References
    Find Out More About Sonoma County Auto Machine Shops from Previous Customers

    It’s best to choose among Diamond Certified auto machine shops because all certified companies have passed an in-depth ratings process that most other companies can’t pass. If you want quality from a auto machine shop in Sonoma County and the greater Bay Area, you can have confidence choosing a Diamond Certified company. Diamond Certified reports are available online for all certified companies.

    And you’ll never be fooled by fake reviews. That’s because all research of Sonoma County auto machine shops and other Diamond Certified companies is performed in live telephone interviews of actual customers.

    If you can’t find Diamond Certified auto machine shop in Petaluma, Windsor, Healdsburg, Santa Rosa, Sonoma, Cloverdale, Sebastopol, Cotati, Guerneville and Rohnert Park or within reach, you’ll have to do some research on your own. If you do, it’s wise to call some references provided by your auto machine shop.

    Keep in mind, though, that references provided to you by auto machine shop are not equal in value to the large random sample of customers surveyed during the Diamond Certified ratings process. That’s because references given to customers by companies are usually cherry-picked instead of randomly selected. So the machinists will likely give you a few customers to call that they know are satisfied, which means you may not get a complete picture of what you can expect.

    If you do call references on your own, specifically ask for a list of the engine machine shop's 10 most recent customers or the most recent customers for whom they provided services similar to those you're seeking. This will help avoid them giving you the names of only customers they know were satisfied.

    Then, call those references and use the following questions alongside some of your own to get the answers you need to make an educated decision.

    1. What car engine repairs or machining services did _(auto machine shop name_) do for your vehicle?
    2. Were you satisfied with the automotive machining services from this Sonoma County engine machine shop?
    3. Was this Sonoma County engine machine shop willing to tow your vehicle to their auto repair garage if you had it stored at another auto repair shop, at your home or other location, or live out of town or in a smaller town such as Salmon Creek, Rio Nido, Occidental, Russian River Meadows, Graton, Gulton, Forestville, Cazadero, El Verano, Alexander Valley, Freestone?
    4. Were you pleased with this shop's turn-around time? Was it close to the original time estimate?
    5. Did the machinists and service writers listen to you and communicate with you?
    6. Did they keep you informed about the status of your job or let you know if the work or charges would be different than originally promised?
    7. Was the price was fair for the engine machining, repairs or rebuild you had done here?
    8. Did the final cost reflect the original estimate this machine shop initially provided you?
    9. What did you like best about this Sonoma County auto machine shop?
    10. Would you go back to this engine machining shop?
    11. Would you recommend this Sonoma County auto machine shop to friends and family?
    12. What was the best part about working with this shop?
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  • Review Your Options
    Narrow Your Choices to the Best Automotive Machine Shops Near You

    The Diamond Certified symbol has been awarded to companies that scored Highest in Quality in an accurate ratings process.

    Engine rebuilds and repairs can seem intimidating at first, but hiring the right Sonoma County auto engine machine shop to perform your engine machining services can relieve that stress and make you feel comfortable with your decision and the work you need to have done.

    That's why it’s important to consider the following questions before deciding on the best auto machine shop in Sonoma County for you in Guerneville, Santa Rosa, Sebastopol, Cotati, and Cloverdale or beyond:

    1. Is one of the Sonoma County engine machining shops you interviewed and researched able to meet your needs in terms of services, equipment, expertise, repairs or rebuilds, part preferences, scheduling and customer service?
    2. Does the shop you're considering communicate clearly with you regarding the repairs or engine rebuild services your vehicle needs, and what materials, services and options are best for you and your vehicle?
    3. Do your goals and those of the auto engine machining shop align?
    4. Do you feel comfortable making an appointment with the Sonoma County auto machine shop you've chosen? (You should, otherwise, go back to your notes or revisit other local shops until you find one that can help you and that makes you feel comfortable with your choice.)
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  • How To Work With
    What to Know Before You Choose Among Sonoma County Auto Machinists

    Not all Sonoma County automotive machine shops operate with the same integrity and focus on customer service. Some may provide excellent work, but may not be timely or professional in providing it. Others have good ethics and customer service, but don't have the updated tools and equipment needed to perform the work.

    That's where careful research comes in.

    In order to find the best local machine shops—the ones that provide timely service, good customer care, and have all of the tools and expertise to do the job right the first time—you 'll need to do some interviews of shops in Santa Rosa, Petaluma, Sebastopol, Cotati, Cloverdale and Rohnert Park and beyond, and their recent customers.

    Make sure that the local engine machine shop you're considering specializes in the type of work you need to have done and the vehicle on which you require work. Some shops work mainly on performance vehicles while others spend most of their time on stock repair work. You'll want to make sure the Sonoma County machining shop you choose has the expertise, equipment and ability to repair your type of engine. Then, it's as simple as performing some interviews to narrow down your choices.

    The steps above and the previous articles should have gotten you started and given you the tips you need to make a smart decision.

    Now, it's up to you to follow through by making an appointment for the automotive engine repairs, rebuilding and machining services your vehicle needs.

    What To Do Once You've Found the Engine Machine Shop You Want to Work With
    The first step is to explain the problem or desired upgrades to the service writer. (With smaller shops, you may be dealing directly with the machinist rather than a service writer.) Use your notes so you can completely and accurately describe the problems and goals.

    This is your chance to explain your needs and get input and advice from the service writer or auto machinist. Don't be in a rush and don't let them rush you. You deserve to be heard and understand the work they're recommending and planning to provide for your vehicle.

    Ask for an explanation if you are unclear about their terms or plan. Automotive engine machining is complicated, so it isn't uncommon for car owners to need some detailed explanations or terms defined. You should completely understand the problem and the solutions before you sign an agreement or leave the shop.

    By law, all auto repair estimates in Cotati, Windsor, Petaluma, Santa Rosa, Rohnert Park, Guerneville and Healdsburg and the rest of Sonoma County and the Bay Area must be provided in writing before the work begins. Complete estimates must include the total cost for parts and labor, an itemized list of all parts needed and a description of the repair method. Never sign a blank work order or incomplete estimate.

    Sometimes a diagnosis or tear-down is needed before a machine shop can give you an accurate estimate. If this is the case with your vehicle, the estimate you sign may include just the cost of the diagnosis and estimated labor cost for tear-down or disassembly. If the actual engine repair service end up being more expensive than the original estimate, the Sonoma County auto machine shop must contact you before they move ahead with the repairs and get your authorization on further work and costs.

    Signing a Contract or Estimate for Auto Machine Shop Services
    Once you're comfortable with the agreement and plan of action, it's time to sign the estimate or contract that authorizes the work to commence. Again, carefully review the estimate to ensure that it covers the cost of materials/parts and labor, quality or brand specifications (if any were promised or requested), and other details of pricing and service.

    The shop is still required to call you with any changes to the original estimate if the work exceeds the original estimate or if changes are made to the brands, quality, parts or materials installed in your vehicle. For this reason, verify that the estimate has your correct contact information listed, including a phone number where you can be reached at all times while your vehicle is in their care.

    You are also legally allowed to request to see or have returned to you any old parts removed or repaired by auto machine shops in Santa Rosa, Petaluma, Rohnert Park, Windsor, Healdsburg, Sonoma and Cloverdale and your area. However, you must make this request before the work begins. If you want to see the old or damaged parts or you expect to be able to take them home with you after the repairs, you must make this request while the service request is being written. It's wise to write it into the contract or on the estimate to avoid any miscommunication. (In some cases, especially warranty repairs in which the parts may need to be returned to the manufacturer, you may not be able to take the old parts home with you. But it is always within your rights to at least see the damaged parts.)

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  • Be a Good Customer
    How Can You Be a Good Auto Engine Machine Shop Customer?

    Here are a few simple steps you can take to be a good customer when working with Sonoma County auto machine shops near you.

    • Be clear and upfront about your expectations, wants, long-term goals and other details.
    • Remember, a friendly smile goes a long way in creating and maintaining a good working relationship, especially if problems or misunderstandings come up.
    • Restate your expectations and goals, and reiterate to the auto machinist your understanding of the agreement. Most problems with local auto machine shops occur because of a breakdown in communication. Being clear about your expectations and theirs can help you avoid most conflicts.
    • Ask your auto machine shop if you should call to check on the progress or if he will call you with updates.
    • Be sure your Sonoma County auto engine machinist has a phone number where they can reach you at all times while they're working on your vehicle. The work will move along more smoothly if they can reach you with updates, questions or for work authorizations.
    • When your auto engine machine shop contacts you, return calls promptly to keep the work on schedule.
    • Pay for the auto machine shop services, engine machining, engine repairs, and engine rebuilding work promptly.

    You might be surprised to learn that taking the few simple steps above can reap big benefits. So how does being a good customer work in your favor?

    Auto machine shops in Petaluma, Windsor, Healdsburg, Santa Rosa, Sonoma, Cloverdale, Sebastopol, Cotati, Guerneville and Rohnert Park and throughout Sonoma County appreciate customers who are straightforward, honest and easy to work with. Your good customer behavior sets the tone from your end and creates an environment conducive to a good relationship. Things may very well go smoother and any problems may be more easily resolved.

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Check The Work
Compare the Completed Work with Your Invoice

Along with a written estimate before the work, auto machine shops are required to give you a written invoice that includes the following:

  • The auto machine shop name, physical address and state license number.
  • A complete list of all work performed.
  • An itemized list of all materials and parts used and installed
  • The total cost for the engine machine shop services, including the itemized amount charged for labor.
  • A written explanation of any warranties or guarantees provided by the parts manufacturers and the auto machinists.

It's smart to compare the written estimate you first received with the final invoice to ensure that the parts, services and brands all match up, and that the final invoice amount is the same as what is listed on the estimate or what your machinist reported to you over the phone or in person if the original estimate had to be revised.

You should also feel comfortable asking your Sonoma County auto machine shop staff to show you the work they did. Good machine shops in Petaluma, Windsor, Healdsburg, Santa Rosa, Sonoma, Cloverdale, Sebastopol, Cotati, Guerneville and Rohnert Park and beyond are willing to point out their work and answer any questions you might have about the repairs, rebuild or other services that were provided.

Additionally, if you asked for the old parts to be shown to you or returned, this is the time to make sure your shop lives up to that promise. They should be willing to show you the worn areas and help you understand why a repair or replacement was necessary.

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Written Warranties
Protecting Your Vehicle and New Engine with Written Warranties

The best protection you can get for your vehicle is hiring a qualified auto engine machine shop in Guerneville, Santa Rosa, Sebastopol, Cotati, and Cloverdale or your area to work on your vehicle. But the next best thing you can do is get all guarantees and warranties on parts and labor in writing.

Confirm all warranties and make sure you get them in writing before leaving the Sonoma County auto engine machine shop that provided your work. Warranties can be voided or your ability to get proof of promised warranty coverage can be limited if you don’t confirm warranties before leaving the premises, so it's critical that you do this before you complete the transaction.

Not all shops guarantee their work or install warranted parts, but those that do must give you a written document that details the following:

  • The auto machine shop name, physical address and state license number.
  • A description of exactly what the warranty covers. This should include whether the machine shop will repair or replace any faulty materials or workmanship.
  • Any exclusions must be explicitly stated.
  • Your responsibility in the case of a problem and what you need to do in order to redeem the warranty.
  • How long the warranty is valid, and whether it expires on a specific day or is prorated (meaning, the warranty coverage and amount owed for repair or replacement diminishes over time).
  • If the warranty coverage is transferable to the new owner if you sell the vehicle.
  • Any actions or inaction on your part that may invalidate the warranty.
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Top 10 Requests
Sonoma County Machine Shop Services Available to You

As you know, Sonoma County machine shops offer a variety of services that depend on their specialized abilities, machinist skills, types of machinery, and preferences. Here are some of the machine shop services you an expect to find in Santa Rosa, Petaluma, Sebastopol, Cotati, Cloverdale and Rohnert Park and throughout Sonoma County and the rest of the Bay Area. Because abilities and services vary so greatly, it's smart to verify that the local machinist shop you're considering is skilled at providing the services you need and can work on your particular vehicle.

Stock Rebuilds at Sonoma County Auto Machine Shops
Stock engine rebuilds are the process of rebuilding an engine using stock parts, or factory stock parts that are new and build by the original manufacturer or another engine manufacturer. This is in contrast to custom engine rebuilds or remanufactured or custom engine rebuilds in which parts are manufactured, machined and created by the auto machine shop. Stock engine rebuilds conform to the performance and care specifications of new engines and are covered by the same warranty length as factory-new engines.

Custom Engine Rebuilds
Custom engine rebuilds are those planned and carried out by Sonoma County auto engine machinists in Santa Rosa, Petaluma, Rohnert Park, Windsor, Healdsburg, Sonoma and Cloverdale and other areas. Skilled engine machinists completely customize and build engines to customer preferences and specifications and vehicle needs. These are most often used on racing vehicles, high-performance vehicles and other specialty vehicles.

Performance Engine Rebuilding and Customization
High performance engines and engines are used for racing, drag racing, competition auto sports, high-performance street cars, muscle cars, racing motorcycles, performance boats, racing ATVs, dirt bikes and other vehicles. Some local auto machine shops specialize in high-performance engine rebuilds and customized performance engines. These shops are especially skilled at meeting customer requests and preferences for speed, performance and other factors.

Marine Engine Machining Services
Boat engines and personal watercraft engines for racing, high-performance and simply leisure and recreation are available at marine engine machine shops throughout Sonoma County. These shops have the tools and experience to work on boats, diesel engines, inboard, outboard, and gas engines and propulsion systems. This may include engine repowers, engine repairs, engine rebuilds, engine fuel conversions and other services for boats, Sea-Doo watercraft, water scooters, personal watercraft, Jetskis, and more.

Engine Assembling
Engine assembling or engine assembly services are full or partial assembly services for automotive engines. These are popular with vehicle owners who need help assembling their engines, including bottom end assembly, full assembly, partial assembly, custom engine assembly and more. This allows for customized engine rebuilds, including correct tolerances, clearances, compression ratio in cylinders, and a complete performance package.

Automotive Engine Cleaning in Sonoma County
Engines that are dirty, very old, in need of restoration, or have been damaged may need auto engine cleaning services. While some detailing centers offer engine cleaning and exterior engine cleaning is something you can do at home with the correct materials, auto machine shops can offer much more detailed and thorough services. This may include partial disassembly, removal and replacement of seals or other worn or cracked pieces, degreasing and more.

Cylinder Head Services
Cylinder head services can include degreasing, magnaflux services, pressure tests, cam bearing installation, valve seat replacement, crack repairs, valve guide replacement, cylinder head replacement, cylinder head machining, resurfacing head gaskets, regrinding and more.

Crankshaft Services
Machine shops in Cotati, Windsor, Petaluma, Santa Rosa, Rohnert Park, Guerneville and Healdsburg and beyond can usually service crankshafts, including degreasing, crankshaft inspection, crankshaft welding, thread repair, grinding and regrinding, and crankshaft polishing.

Engine Block Cleaning and Repair
Sonoma County automotive machine shops provide engine block services including degreasing, magnaflux services, boring, honing, line honing, block decking, bolt hole repair, bolt thread repairs, cam bearing replacement, cylinder installation, cylinder sleeve installation, engine block crack repair, engine block welding, six-cylinder engine block repairs, eight-cylinder engine block repairs, and more.

Engine Fabrication at Sonoma County Auto Machine Shops
The act of building (or fabricating) a new engine from scratch is known as “engine fabrication”. This is a very skilled service that can only be provided by the better auto machinists in Sonoma County and the Bay Area. This includes planning, creating and assembling a new engine or new engine parts to create customized engines built to customer specifications and needs.

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Glossary Of Terms
Glossary of Auto Machining Terms

The following words and definitions may help demystify the auto machining industry and help you and your auto engine machinist better understand each other.

automotive engine cleaning
Engines that are dirty, very old, in need of restoration, or have been damaged may need auto engine cleaning services. While some detailing centers offer engine cleaning and exterior engine cleaning is something you can do at home with the correct materials, auto machine shops can offer much more detailed and thorough services. This may include partial disassembly, removal and replacement of seals or other worn or cracked pieces, degreasing and more.

Also known as: engine cleaning, auto engine cleaning, car engine cleaning, engine degreasing, deep engine cleaning services

crankshaft services
Machine shops can usually service auto crankshafts, including degreasing, crankshaft inspection, crankshaft welding, thread repair, grinding and regrinding, and crankshaft polishing.

Also known as: crankshaft repairs, crankshaft degreasing, crankshaft grinding

custom engine rebuilds
Custom engine rebuilds are those planned and carried out by auto engine machinists. Skilled engine machinists completely customize and build engines to customer preferences and specifications and vehicle needs. These are most often used on racing vehicles, high-performance vehicles and other specialty vehicles.

Also known as: engine rebuilds, rebuilt engine, engine rebuilding services, custom engines

cylinder head services
Cylinder head services are any machining services for engine cylinders and cylinder heads, including degreasing, magnaflux services, pressure tests, cam bearing installation, valve seat replacement, crack repairs, valve guide replacement, cylinder head replacement, cylinder head machining, resurfacing head gaskets, regrinding and more.

Also known as: cylinder head repairs, cylinder installations, cylinder replacement, machining services for car cylinders

cylinder honing
Cylinder honing sizes the cylinder bore to the size that is needed for proper clearance between the piston and the cylinder wall, and it creates a pattern of light scratches on the cylinder walls to catch tiny beads of oil to allow for continuous lubrication.

Also known as: cylinder shaft honing, cylinder sizing

engine assembly
Engine assembling or engine assembly services are full or partial assembly services for automotive engines. These are popular with vehicle owners who need help assembling their engines, including bottom end assembly, full assembly, partial assembly, custom engine assembly and more. This allows for customized engine rebuilds, including correct tolerances, clearances, compression ratio in cylinders, and a complete performance package.

Also known as: engine assembling services, custom engine assembly, partial engine assembly

engine block services
Automotive machine shops provide engine block services including degreasing, magnaflux services, boring, honing, line honing, block decking, bolt hole repair, bolt thread repairs, cam bearing replacement, cylinder installation, cylinder sleeve installation, engine block crack repair, engine block welding, six-cylinder engine block repairs, eight-cylinder engine block repairs, and more.

Also known as: engine block repairs, engine block cleaning, engine block care

engine fabrication
The act of building a new engine from scratch is known as engine fabrication. This is a very skilled service that can only be provided by skilled auto machinists. Engine fabrication includes planning, creating and assembling a new engine or new engine parts to create customized engines built to customer specifications and needs.

Also known as: custom engine fabrication, custom auto engine fabrication, engine part fabrication

engine degreasing
Like engine cleaning, engine degreasing is the complete or partial cleaning of a vehicle's engine by a skilled auto machinist. It may include engine disassembly and reassembly, degreasing, cleaning of the internal and external parts, and replacing worn or damaged parts.

Also known as: engine cleaning, degreasing auto engine

engine rebuilding
Engine rebuilding is the act of restoring and rebuilding a failed automotive engine so that it functions like a new engine. Rebuilt engines can be less expensive than buying a new engine and, if built by a skilled auto machinist, can have long warranties to protect their integrity.

Also known as: rebuilding auto engines, rebuilt engines

machining diagnosis
The act of diagnosing which engine parts need machining, repairs, rebuilding or restoration.

Also known as: diagnostics, engine machining diagnostics

marine engine machining services
Boat engines and personal watercraft engines for racing, high-performance and simply leisure and recreation are available at marine engine machine shops throughout Sonoma County. These shops have the tools and experience to work on boats, diesel engines, inboard, outboard, and gas engines and propulsion systems. This may include engine repowers, engine repairs, engine rebuilds, engine fuel conversions and other services for boats, Sea-Doo watercraft, water scooters, personal watercraft, Jetskis, and more.

Also known as: boat engine machining, Sea-Doo engine overhauls, jet ski engine rebuilding, custom watercraft engines

performance engine rebuilding and customization
High performance engines and engines are used for racing, drag racing, competition auto sports, high-performance street cars, muscle cars, racing motorcycles, performance boats, racing ATVs, dirt bikes and other vehicles. Some local auto machine shops specialize in high-performance engine rebuilds and customized performance engines. These shops are especially skilled at meeting customer requests and preferences for speed, performance and other factors.

Also known as: racing engine rebuilding, performance engine customization, performance engine machine shops

stock engine rebuilds
Stock engine rebuilds are the process of rebuilding an engine using stock parts, or factory stock parts that are new and build by the original manufacturer or another engine manufacturer. This is in contrast to custom engine rebuilds or remanufactured or custom engine rebuilds in which parts are manufactured, machined and created by the auto machine shop. Stock engine rebuilds conform to the performance and care specifications of new engines and are covered by the same warranty length as factory-new engines.

Also known as: stock engine repairs, stock engine rebuilding services, remanufacturing stock engines

transmission rebuilding
Transmission rebuilding is the act of repairing, restoring and rebuilding damaged and failed transmissions in vehicles.

Also known as: rebuilt transmission, transmission machining services

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Frequently Asked Questions
FAQ About Local Auto Machine Shops and Engine Machining Services

Q: Why choose Diamond Certified auto machine shops?
A: Diamond Certified helps you choose local auto machine shops with confidence by offering a list of top-rated local companies who have passed the country’s most in-depth rating process. Only auto machine shop rated Highest in Quality earn the prestigious Diamond Certified award. Most companies can’t pass the ratings. American Ratings Corporation also monitors every Diamond Certified company with ongoing research and ratings. And your purchase is backed by the Diamond Certified Performance Guarantee. So you’ll feel confident choosing a Diamond Certified auto machine shop.

Q: What do automotive machine shops do?
A: Automotive machine shops are locations where automotive technicians, often engine specialists, use special machines and tools to fabricate, repair and rebuild engines and other automotive parts. Some automotive machine shops are located within auto repair centers, while others are stand-alone shops. These auto machine shops provide custom items ordered by clients and other special-order parts to repair and enhance cars and trucks. Most auto machine shops work on vehicle engines and auto transmissions, either rebuilding or repairing damaged engines and transmissions. This can save customers money by repairing their existing engine or transmission rather then requiring them to purchase a new one.

Q: What services do local automotive machine shops provide?
A: Local automotive machine shops provide a variety of services depending on their employees' skills and abilities. Call before visiting any shop to make sure they can meet your needs. You can expect to find the following services at most local auto machine shops:

  • engine and transmission cleaning and degreasing
  • disassembling and diagnosing/evaluating engine and transmission problems
  • valve work, including valve replacement, valve machining and valve installation
  • diesel vehicle engine and transmission repairs
  • cylinder pressure testing
  • cylinder head machining, including installation, repairs, cylinder head resurfacing, and cleaning
  • manifold resurfacing
  • cylinder block resurfacing and resizing
  • cylinder sleeve installation
  • block operations including installation of cam bearings and block plug installation
  • piston servicing and cutting
  • connecting rod services including diagnostics, alignment, resizing, grinding and installation
  • engine balancing
  • crankshaft services
  • flywheel resurfacing
  • vintage engine machining
  • marine engine machining
  • performance engines and racing engine machining and repair

Q: Can't just any auto shop provide machining services?
A: While some good auto shops have automotive machining capabilities, machine shops have a lot of costs associated with them and can be too expensive for some smaller shops and individuals to own. Automotive machine shop tools and equipment are often very expensive to purchase, making them hard to come by for those that aren't full-scale auto machine shops. Good machine shops will have all of the machines and equipment necessary to provide the services their clients need, which can be hard to find in smaller shops, regular repair shops and other locations.

Q: Can local auto machinists repair, restore or rebuild my boat engine?
A: Many auto machine shops serve a variety of engine types, including marine engines. However, not all machinists have the tools, experience and ability to repair boat engines, jet ski engines, Sea-Doo engines and others, so call around and specifically ask the shops you're interested in working with whether they can work on marine engines of your type and size.

Q: Why should I consider having my faulty engine rebuilt?
A: Engines that have been rebuilt by good auto machine shops using custom fabricated parts or stock engine parts are often as good as and perform as well as stock engines. In fact, if you have customized requests, you may even be able to get a rebuilt engine that functions better for your needs than your vehicle's original engine. Engine rebuilds are also usually less expensive than having a new factory engine placed in your existing vehicle. So if your engine has failed or if you are needing a new engine, talk with a machinist about having your current engine rebuilt rather than replaced.

Q: Can local automotive engine machine shops create custom high-performance engines?
A: Yes. In fact, many engine machine shops specialize in giving customers high-performance engine upgrades. You'll want to interview local machinists and talk with them about your wants and their abilities.

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