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Welcome to Promar Engines

Your Trusted Partner for Engine Remanufacturing

Promar Precision Engines, based in Paterson, New Jersey, has over 45 years of experience as engine rebuilders and is committed to the highest quality products and services offered in the industry.

Promar Precision Engines is a professional engine remanufacturing company serving customers worldwide with a complete line of rebuilt engines / remanufactured engines, cylinder heads, crankshafts, engine restoration services and engine components for Automobile & Light Truck, Classic Automobile, Diesel (Light Duty), High Performance and Marine (Boats)

Promar stands apart by offering unparalleled expertise in remanufacturing. Our team combines cutting edge technology with meticulous craftsmanship to ensure every engine meets or exceeds original performance standards. Whether you're restoring a classic car or need reliable marine engine repair, we’re here to deliver results you can trust.

At Promar we take pride in serving a diverse range of clients, from enthusiasts preserving vintage vehicles to professionals seeking performance upgrades. Our attention to detail and commitment to excellence have earned us a loyal customer base across multiple industries.

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BBB Accredited & Flexible Payment Options

Shop Securely with PayPal For Peace Of Mind

Promar Engines is proud to be BBB Accredited with an A+ rating, reflecting our commitment to trust and integrity. We offer flexible payment options including PayPal, allowing you to buy now and pay later with confidence. Your satisfaction and convenience are our top priorities!

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PayPal Accepted

Shop securely with PayPal and enjoy safe, convenient transactions every time.

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BBB Accredited

We meet the highest standards for trust ensuring peace of mind for every customer.

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Buy Now Pay Later

Enjoy flexible financing options with payment plans that will fit your budget.

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REMANUFACTURING PROCESS

Enabling Engine Excellence Through Precision

Our remanufacturing process ensures that each component meets the highest standards. From thorough inspections and precision machining to rigorous testing, we restore engine blocks, cylinder heads, and crankshafts to like new condition for dependable performance

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Engine Blocks
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Engine Blocks

Our remanufacturing process for engine blocks includes detailed inspections, precision machining, and rigorous testing. Each block is restored to like-new condition, meeting or exceeding OEM standards for reliability.

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Cylinder Heads
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Cylinder Heads

Our remanufacturing of cylinder heads includes comprehensive cleaning, crack detection, and machining. We install plugs, check spring pressure, and add seals, ensuring each head performs reliably and efficiently.

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Crankshafts
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Crankshafts

Our crankshaft remanufacturing process includes detailed inspections, grinding, and polishing to restore the crankshafts to precise specifications. This ensures a smooth and efficient engine operation with maximum durability.

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CUSTOMER SERVICE QUICK REFERENCE

Customer Service Information

For your convenience, here's a quick reference to important customer service details. Learn more about our payment options, sales tax policies, business hours, and other essential information to help guide your experience with Promar Engines.

PAYMENT

We accept Business Checks, Certified Bank Checks, Cash, Money Orders, Paypal, Zelle, Apple Pay, Google Pay, Venmo, Wire Transfers and All Major Credit Cards. All funds must be in United States currency (US Dollars).

SHIPPING & DELIVERY

Please use the form below to calculate shipping cost for your area.

Delivery of the engine by truck equipped with a lift gate is $75 each way and residential delivery is an additional $100 each way. Those services are free for New Jersey customers.

Additionally, if your delivery address is a farm it's considered a residential property and will require Residential Delivery.

Shipping options are also available for customers outside of the United States. Please email sales@promarengine.com for more details.

SHIPPING COST

Select your destination to get shipping cost.

STATE SALES TAX

All orders shipped within New Jersey will have 6.625% New Jersey state sales tax added.

All orders shipped within New York, Pennsylvania, Florida, North Carolina, South Carolina, Michigan or Illinois will have your current county sales tax added. We do not we collect sales tax in the other states.

BUSINESS HOURS

Our normal business hours are Monday-Friday 7am-4pm EST. We can be reached by phone @ 1-800-422-6022 or by email info@promarengine.com

CORE POLICY

All engines, cylinder heads, and crankshafts are sold on an exchange basis. While there is no core deposit required, all cores must be returned. By purchasing our product you agree to have the appropriate, rebuildable core ready for pickup or paid for in full within 30 days. After 30 days your warranty will be voided and you will be charged market value for your core. Please call for immediate pickup.

For more information please feel free to call toll free Monday-Friday 7am-4pm EST@ 1-800-422-6022 or email us info@promarengine.com

LATEST GOOGLE REVIEWS

What Our Customers Say

Discover the difference with Promar Engines. We take pride in delivering top notch services to our customers. Don't just take our word for it hear what they have to say about their experiences with us! Our commitment to quality and customer satisfaction speaks through their success stories.

Bought the famous 5.4 triton

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Earl Preston

4 days ago

Promar Precision Engines was very easy to deal with, also had the lowest priced remanufactured 6.2L motor and delivered to residential address. The engine came on a pallet bolted down and was in pristine condit...

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Nick Utterback

5 days ago

Once paid for the engine was delivered very quick... It was in new like condition, The mechanics were very impressed with the work and asked for the contact information for Precision for possible future use..

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Dr Dan

1 week ago

ProMar Engine Rocks! My 2018 Chevy Tahoe LT 5.3L is now running on full V8 paired with Diablo Predator X. ProMar's AFM/DOD Delete is The One.

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George Abella

1 week ago

We were able to discuss the issues with the motor and settle on a resolution that works for everyone. Happy ending

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Laura Soto

2 months ago

The motor was delivered in less time than I expected considering I ordered it between storms during late winter. The motor has been in for seven days and I already have 560 miles on it. It starts before 1/4 rev...

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Allen Thiel

2 months ago

We have been a supplier to Promar since 2009. They are a great business partner - clear orders, fast payment and quick to share important information that benefits both of us as well as all of our combined cust...

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Scott Blood

3 months ago

Needed an engine at the last minute and nobody had the 6.2. Emailed these guys and within a hour someone contacted me and pulled one of the shelf for me till payday. Got the engine really fast and was very sati...

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Danny Pettigrew

4 months ago

These guys were such a breath of fresh, honest customer service, thank you gentlemen for your time and advice.

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Robert La Touche

4 months ago

Just had a 7.3 IDI international long block completed with ARP head studs and main bolts. This truck runs amazing now. Great customer service and support.

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Joe Watson

4 months ago

2026 UPDATE: I have put 20,000 miles on my 2.3L Ford Engine since PROMAR rebuild. Want to share the longevity of this rebuild with zero issues nor codes. Key to follow all PROMAR instructions with no shortcuts ...

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Michael Kirk

4 months ago

Top notch business and the prices are unbeatable!!!

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Thomas Brockett Ii

5 months ago

Great job you met my expectations dod delete true v8 now

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Jose Ruiz

5 months ago

I am extremely impressed with how fast they had my motor shipped to me. I believe it took 6 days from the time I ordered it to the time it was in my shop. So far, I have almost 1,000 miles on the new motor with...

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Patrick Allis

5 months ago

great motor pentastar v6 jeep wrangler

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Ed Geleski

5 months ago

Put a Promar 4.6 liter 2 valve engine in my 2001 Mustang rebuild. Was able to customize with a ProComp cam & polished headed. Promar engine runs great and car has more horsepower that the old engine. Further...

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Jeffrey Olah

6 months ago

From TNT AUTO CENTER Pompano Beach Florida Thank You For a great job rebuilding hour 1960 390 cadillac motor. Also for cleaning valve covers ,oil pan , intake, no extra charge. Thanks Tom

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Thomas Delgiudice

7 months ago

Great job!!! Kevin was very helpful form start to finish..

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Sumner Dilworth

9 months ago

Excellent experience start to finish with Promar! Purchased a rare, very hard to find, rebuilt 3.7l Mercruiser motor which I received in within a week. Installed the motor and it is running like a brand new mot...

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Tbj11

9 months ago

Great product. Received it quickly. Second engine that I have purchased from promar. Very pleased.

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Jim Sloan

9 months ago

LATEST NEWS

Company Updates & Announcements

Get the inside scoop on the latest developments at Promar Engines. From groundbreaking innovations to important announcements, we keep you updated on everything happening within our company and the engine remanufacturing industry.

WHY MANY CUSTOMERS CHOOSE 5.3L L84 & 6.2L L87 DFM DELETE

Posted on December 11, 2025 by promarengine

The GM L84 (5.3L) and L87 (6.2L) engines are part of GM’s modern L+ series found in late model Silverado, Sierra, Tahoe, Yukon, and similar platforms. These engines use Dynamic Fuel Management (DFM) GM’s updated evolution of Active Fuel Management (AFM) Continue reading →

EXCITING NEWS: WE NOW ACCEPT ZELLE FOR PHONE AND ONLINE PAYMENTS!

Posted on March 17, 2025 by promarengine

We’re always looking for ways to make shopping with us easier and more convenient. That’s why we’re thrilled to announce that we now accept Zelle as a payment method—both for purchases made over the phone and through our online shopping cart! Continue reading →

NOW OFFERING GM 4.3L ECOTEC3 LV3 ENGINES WITH AFM DELETED

Posted on February 26, 2025 by promarengine

If you’re in the market for a GM 4.3L EcoTec3 V6 engine and want to avoid the common problems associated with Active Fuel Management (AFM), we’ve got great news! We are now offering GM 4.3L EcoTec3 LV3 engines with AFM deleted, giving you a more reliable and Continue reading →

INTRODUCING PROMAR ENGINES 6.4 ENGINE FOR RAM TRUCKS: A GAME CHANGER WITHOUT MDS

Posted on August 13, 2024 by promarengine

For Ram truck enthusiasts and owners, the search for a powerful, reliable engine upgrade just got easier. Promar Engines has recently expanded its lineup to include a 6.4-liter engine specifically designed for Ram trucks from 2014 to 2020. But what makes this engine truly stand out? It’s a non-MDS (Multi-Displacement System) engine that doesn’t require any reprogramming of the trucks computer. Continue reading →

INTRODUCING NON-AFM GM 5.3 L83 AND 6.2 L86 ENGINES

Posted on May 21, 2024 by promarengine

We’re excited to announce that we now offer non-AFM (Active Fuel Management) versions of the highly acclaimed GM 5.3 L83 and GM 6.2 L86 engines. This upgrade comes in response to the preferences of Continue reading →

MEMBERSHIPS

Our Industry Affiliations

Promar Engines is proud to be a member of esteemed organizations that set the standards for quality and excellence in the industry. Our memberships reflect our commitment to staying at the forefront of engine remanufacturing and adhering to the highest professional standards.

Frequently Asked Questions
Can you remanufacture my original engine?

Yes. We can remanufacture your original engine back to factory specifications.

Besides remanufacturing engines do you also offer machining services?

Yes. We provide machining services for engine blocks, cylinder heads, crankshafts and connecting rods.

Can I pick up an engine from your facility?

Yes. All customers picking up at our New Jersey facility must pay New Jersey sales tax.

I'm experiencing engine problems. Can I bring my vehicle to you?

Sorry, we can't help with vehicle repairs we are not mechanics. You may want to contact a licensed auto repair shop for assistance.

Do you remove and install engines?

No. We are strictly a machine shop that specializes in remanufacturing engines. We do not remove or install engines.

Do you offer or remanufacture engines for BMW, Mercedes-Benz, Porsche, Range Rover or Jaguar vehicles?

No. We do not offer or remanufacture engines for these brands.

Do you offer financing?

We do not offer in-house financing. However, we accept PayPal, which provides options such as Buy Now, Pay Later.

Contact Info

10 Peach St, Paterson, NJ 07503 sales@promarengine.com (800) 422-6022 (973) 684-1500 (973) 684-1212

Our Hours

Mon - Friday:

7:00 am to 4:00 pm

Saturday & Sunday:

Closed

Services

Align Honing Crankshaft Grinding Cylinder Boring Cylinder Honing Resurfacing (Block & Head)

Credit Cards

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2010-2026, Promar Precision Engines, All right reserved.