Best Rear Main Seal Repairs: Stop Leaks Fast

Are you looking for the best rear main seal repairs to fix your car’s oil leaks? We’ve compiled a list of 10 top solutions, from easy additives to durable replacements, to help you tackle leaks efficiently and keep your engine running smoothly.

Oil leaks can be a headache for any car owner. They’re messy, costly, and can damage your engine. But don’t worry—we’ve got you covered with the best rear main seal repairs to fix those leaks fast.

From easy-to-use additives to durable replacement seals, there’s a solution for every problem. Whether you’re a DIY enthusiast or prefer professional help, we’ve found the top options to save you time and money. Say goodbye to leaks and hello to a smooth-running engine.

Ready to tackle that leak? Let’s dive into the best rear main seal repairs that will keep your car running like new.

List of Top 10 Rear Main Seal Repairs

Title	Best For	Price
Bar’s Leaks Rear Main Seal Repair, 16.9 oz	This product is perfect for drivers with oil leaks. It stops hard-to-fix leaks fast and easily.	View on Amazon (paid link)
Bar’s Leaks Rear Main Seal Repair (Pack of 6)	This product is perfect for anyone with an oil leak. Whether you drive a car, truck, or motorcycle, Bar’s Leaks Rear Main Seal Repair can stop leaks fast.	View on Amazon (paid link)
DNJ RM422 Rear Main Seal for 1986-2011 Ford, Land Rover, Mazda, Mercury Aerostar, B4000, Bronco II 2.9L-4.0L V6 12V SOHC 245cid	This DNJ RM422 Rear Main Seal is perfect for car owners who need a reliable replacement part for their 1986-2011 Ford, Land Rover, Mazda, or Mercury vehicles. It’s ideal for those with 2.9L-4.0L V6 engines looking for a trusted, brand-new solution backed by a 1-year warranty.	View on Amazon (paid link)
DNJ RM1120 Rear Main Seal for 1981-2000 Jeep Cherokee, CJ7, Comanche 4.0L-4.2L L6 12V OHV 242cid	This DNJ RM1120 Rear Main Seal is perfect for Jeep owners who need a reliable replacement part. It’s ideal for 1981-2000 Jeep Cherokee, CJ7, and Comanche models with 4.0L-4.2L engines.	View on Amazon (paid link)
Dorman 635-518 Engine Rear Main Seal Cover Compatible with Select Models	This Dorman 635-518 Engine Rear Main Seal Cover is perfect for car owners who need a reliable and durable fix for their vehicle’s rear main seal. It’s ideal for those seeking a direct replacement that prevents leaks and ensures a long-lasting repair.	View on Amazon (paid link)
FEL-PRO BS 40712-1 Rear Main Seal Set	The FEL-PRO BS 40712-1 Rear Main Seal Set is perfect for car owners who need a reliable engine crankshaft seal kit. It’s ideal for Volkswagen Atlas and other compatible vehicles, ensuring a perfect fit and trusted quality.	View on Amazon (paid link)
FEL-PRO BS 40765 Rear Main Seal Set	The FEL-PRO BS 40765 Rear Main Seal Set is perfect for owners of Chevrolet Silverado 1500 and other compatible vehicles. It’s ideal for those needing a reliable, high-quality seal kit that fits perfectly and meets original equipment standards.	View on Amazon (paid link)
DNJ RM4200 Rear Main Seal for 1994-2003 Ford E-350 Club Wagon, E-350 Econoline, E-350 Econoline Club Wagon 7.3L V8 16V OHV 445cid	This DNJ RM4200 Rear Main Seal is perfect for Ford owners who need a reliable replacement part. It’s ideal for 1994-2003 Ford E-350 models with a 7.3L V8 engine.	View on Amazon (paid link)
FEL-PRO BS 40674 Rear Main Seal Set	The FEL-PRO BS 40674 Rear Main Seal Set is perfect for Toyota and Lexus owners who need a reliable replacement part. It’s ideal for those with older models like the Toyota 4Runner, Camry, Tundra, or Lexus ES250/ES300.	View on Amazon (paid link)
FEL-PRO BS 30138 Rear Main Seal Set	The FEL-PRO BS 30138 Rear Main Seal Set is perfect for classic car owners who want a reliable and precise fit. It’s ideal for Ford Thunderbird and Shelby Cobra enthusiasts looking to restore or maintain their vehicles with top-quality parts.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 Rear Main Seal Repairs carefully selected for performance and value. Each product is expert-reviewed and backed by customer feedback, ensuring you get the best solution for your vehicle. Whether you need affordability or durability, this guide has you covered. Read on to find the perfect fit and drive with confidence!

1. Bar’s Leaks Rear Main Seal Repair, 16.9 oz

Tired of those pesky oil drips under your car? Bar’s Leaks Rear Main Seal Repair is your secret weapon against stubborn oil leaks. This powerful formula is designed to tackle even the most challenging leaks, giving you peace of mind.

Just add the entire bottle to your engine oil. It works on timing covers, cam seals, and rear main seals. Get back on the road with confidence.

Most leaks disappear within 100 miles or 2 days. It’s a simple solution for a common problem. Drive worry-free!

Pros	Cons
Stops hard-to-fix oil leaks fast. Easy to use—just add to engine oil. Works better than regular stop leaks. Seals multiple leaks, not just the rear main. Quick results—leaks stop in 100 miles or 2 days.	Might not fix major leaks. Requires driving to work effectively. Can be messy if overfilled.

Perfect For:

This product is perfect for drivers with oil leaks. It stops hard-to-fix leaks fast and easily.

Ready to Purchase?

View Price on Amazon (paid link)

2. Bar’s Leaks Rear Main Seal Repair (Pack of 6)

Stop oil leaks with Bar’s Leaks Rear Main Seal Repair. It works on all vehicle types, including gasoline, diesel, and turbocharged engines. This powerful formula seals common leak points like timing covers and cam seals.

It also restores seals to like-new condition. Special additives even help with severely worn seals and crankshafts. The seal polymer is compatible with all petroleum-based engine oils, including high-mileage and synthetic.

One bottle treats 4 to 6 quarts of oil. It’s a simple solution for a common problem.

Pros	Cons
Stops all oil leaks in any vehicle type, guaranteed. Seals rear main leaks and more, better than stop leaks. Restores seals to like-new condition, even in worn engines. Works with all oils, including synthetic and high-mileage.	Not a permanent fix, may need repeated use. Doesn’t work on all leaks, check compatibility first. May void warranty, consult your mechanic before use.

Perfect For:

This product is perfect for anyone with an oil leak. Whether you drive a car, truck, or motorcycle, Bar’s Leaks Rear Main Seal Repair can stop leaks fast.

Ready to Purchase?

View Price on Amazon (paid link)

3. DNJ RM422 Rear Main Seal for 1986-2011 Ford, Land Rover, Mazda, Mercury Aerostar, B4000, Bronco II 2.9L-4.0L V6 12V SOHC 245cid

The DNJ RM422 Rear Main Seal is brand new and ready to use. It fits 1986-2011 Ford, Land Rover, Mazda, and Mercury vehicles. This seal works with 2.9L-4.0L V6 engines.

It comes with a 1-year or 12,000-mile warranty. DNJ Engine Components is trusted for quality. They have 30+ years of experience.

We chose DNJ for their reliability and trust. This seal helps earn customer loyalty.

Pros	Cons
Brand new for top performance. Fits many Ford, Mazda, Land Rover vehicles. Comes with a 1-year warranty. Trusted brand with 30+ years of quality. Reliable engine component for your truck.	Limited vehicle compatibility – only fits specific Ford, Mazda, and Land Rover models. No installation tools included – requires additional purchases for setup. Warranty restrictions – only covers 1 year or 12,000 miles.

Perfect For:

This DNJ RM422 Rear Main Seal is perfect for car owners who need a reliable replacement part for their 1986-2011 Ford, Land Rover, Mazda, or Mercury vehicles. It’s ideal for those with 2.9L-4.0L V6 engines looking for a trusted, brand-new solution backed by a 1-year warranty.

Ready to Purchase?

View Price on Amazon (paid link)

4. DNJ RM1120 Rear Main Seal for 1981-2000 Jeep Cherokee, CJ7, Comanche 4.0L-4.2L L6 12V OHV 242cid

The DNJ RM1120 Rear Main Seal is brand new and ready to use. It fits 1981-2000 Jeep models like the Cherokee, CJ7, and Comanche. This seal works with 4.0L-4.2L L6 engines.

It comes with a 1-year or 12,000-mile warranty. DNJ Engine Components is a trusted provider of engine parts. They have 30+ years of quality and experience.

We chose DNJ for their reliability and trust. This seal helps earn customer loyalty over time.

Pros	Cons
Brand-new DNJ® Rear Main Seal for reliable performance. Fits 1981-2000 Jeep models with 4.0L-4.2L engines. 1-year warranty or 12,000 miles for peace of mind. Trusted DNJ® quality with 30+ years of experience.	Limited to specific Jeep models. Warranty is one year only.

Perfect For:

This DNJ RM1120 Rear Main Seal is perfect for Jeep owners who need a reliable replacement part. It’s ideal for 1981-2000 Jeep Cherokee, CJ7, and Comanche models with 4.0L-4.2L engines.

Ready to Purchase?

View Price on Amazon (paid link)

5. Dorman 635-518 Engine Rear Main Seal Cover Compatible with Select Models

Stop leaks with the Dorman 635-518 Engine Rear Main Seal Cover. This is a direct replacement for your vehicle. It’s designed for a perfect fit.

This kit includes everything you need for a complete repair. You get a new gasket and all the installation hardware.

Made from strong die-cast aluminum, this cover is built to last. It’s tested for quality to ensure it works great and lasts a long time.

Pros	Cons
Direct replacement matches factory design for perfect fit. Durable aluminum ensures leak-free and long-lasting performance. Complete kit includes gasket and hardware for easy repair. Quality tested for reliable and long service life.	Not universal – only fits select models, check compatibility first. No installation guide – might need professional help to install. Pricey option – could be more expensive than other brands.

Perfect For:

This Dorman 635-518 Engine Rear Main Seal Cover is perfect for car owners who need a reliable and durable fix for their vehicle’s rear main seal. It’s ideal for those seeking a direct replacement that prevents leaks and ensures a long-lasting repair.

Ready to Purchase?

View Price on Amazon (paid link)

6. FEL-PRO BS 40712-1 Rear Main Seal Set

The FEL-PRO BS 40712-1 Rear Main Seal Set is a reliable engine crankshaft seal kit. It’s designed for Volkswagen Atlas and other high-performance vehicles.

This kit fits multiple models, including Porsche Cayenne and Audi A7 Quattro. Always check compatibility before buying to ensure a perfect fit.

Application-specific design meets original equipment standards. Trust the quality for lasting performance.

Pros	Cons
Perfect fit for your vehicle. Meets or beats original quality. Trusted quality you can rely on. Designed for specific applications.	Limited vehicle compatibility – Not universal, check before buying. No installation tools included – Extra cost possible. Specific design – May not fit all engine types.

Perfect For:

The FEL-PRO BS 40712-1 Rear Main Seal Set is perfect for car owners who need a reliable engine crankshaft seal kit. It’s ideal for Volkswagen Atlas and other compatible vehicles, ensuring a perfect fit and trusted quality.

Ready to Purchase?

View Price on Amazon (paid link)

7. FEL-PRO BS 40765 Rear Main Seal Set

Keep your Chevrolet Silverado 1500 running smoothly with the FEL-PRO BS 40765 Rear Main Seal Set. This essential engine part ensures a tight seal to prevent leaks. It’s designed for unmatched quality and a perfect fit.
This durable seal kit meets or exceeds original equipment standards. Trust FEL-PRO for reliable performance and long-lasting protection for your vehicle.

Pros	Cons
Perfect fit for your vehicle with application-specific design. Meets or exceeds all original equipment specifications. Unsurpassed quality you can trust for long-lasting performance. Wide compatibility with Chevrolet and Cadillac models.	Limited vehicle compatibility – Not universal, check before buying. No installation tools included – Extra cost possible. Specific design – May not fit all engines.

Perfect For:

The FEL-PRO BS 40765 Rear Main Seal Set is perfect for owners of Chevrolet Silverado 1500 and other compatible vehicles. It’s ideal for those needing a reliable, high-quality seal kit that fits perfectly and meets original equipment standards.

Ready to Purchase?

View Price on Amazon (paid link)

8. DNJ RM4200 Rear Main Seal for 1994-2003 Ford E-350 Club Wagon, E-350 Econoline, E-350 Econoline Club Wagon 7.3L V8 16V OHV 445cid

The DNJ RM4200 Rear Main Seal is brand new and ready to install. It’s designed for specific Ford models from 1994 to 2003.

This seal fits Ford E-350 Club Wagon, E-350 Econoline, and E-350 Econoline Club Wagon. It works with the 7.3L V8 OHV Turbocharged engine. The part is reliable and built to last.

It comes with a 1-year or 12,000-mile warranty. DNJ Engine Components is trusted for over 30 years. We chose them for their quality and experience.

Pros	Cons
Brand new DNJ® Rear Main Seal for reliable performance. Fits perfectly on 94-03 Ford 7.3L V8 engines. 1-year warranty or 12,000 miles for peace of mind. Trusted brand with 30+ years of quality and experience.	Limited vehicle compatibility: Only fits specific Ford models. No installation tools included: Requires extra purchase. Warranty restrictions: Only covers 1 year or 12,000 miles.

Perfect For:

This DNJ RM4200 Rear Main Seal is perfect for Ford owners who need a reliable replacement part. It’s ideal for 1994-2003 Ford E-350 models with a 7.3L V8 engine.

Ready to Purchase?

View Price on Amazon (paid link)

9. FEL-PRO BS 40674 Rear Main Seal Set

The FEL-PRO BS 40674 Rear Main Seal Set is a reliable engine crankshaft seal kit. It’s designed for Toyota and Lexus vehicles.

This kit fits multiple models from 1988 to 2004. Check your vehicle’s year, make, and model for a perfect fit.

The application-specific design ensures easy installation. It meets or exceeds original equipment quality standards. Trust this durable and dependable product.

Pros	Cons
Perfect fit for many Toyota and Lexus models. Meets or exceeds original equipment specs for top quality. Easy to verify compatibility with your vehicle details. Trusted brand with unsurpassed quality you can rely on.	Compatibility might need a double-check. Research is key before you buy.

Perfect For:

The FEL-PRO BS 40674 Rear Main Seal Set is perfect for Toyota and Lexus owners who need a reliable replacement part. It’s ideal for those with older models like the Toyota 4Runner, Camry, Tundra, or Lexus ES250/ES300.

Ready to Purchase?

View Price on Amazon (paid link)

10. FEL-PRO BS 30138 Rear Main Seal Set

The FEL-PRO BS 30138 Rear Main Seal Set is a reliable engine crankshaft seal kit designed for Ford Thunderbird and other classic vehicles. It ensures a perfect fit for specific models, keeping your engine running smoothly.

This kit meets or exceeds original equipment specifications, so you can trust its quality. It’s application-specific, meaning it’s made just for your car’s needs.

Before buying, check compatibility with your vehicle’s year, make, model, engine, and trim. This easy-to-install set is built to last and keeps your engine leak-free.

Pros	Cons
Perfect fit for your vehicle. Meets original quality standards. Trusted, unsurpassed quality guaranteed. Application-specific design ensures fit.	Limited compatibility with newer vehicles, check before buying. No installation tools included, extra purchase needed. Specific design may not fit all engine types.

Perfect For:

The FEL-PRO BS 30138 Rear Main Seal Set is perfect for classic car owners who want a reliable and precise fit. It’s ideal for Ford Thunderbird and Shelby Cobra enthusiasts looking to restore or maintain their vehicles with top-quality parts.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Fixing a rear main seal leak is important for your car. It stops messy oil drips and protects your engine. Getting the right repair means a smoother ride.

Buying Guide: Best Rear Main Seal Repairs

Experiencing an oil leak can be a real pain. Fortunately, there are many great options to fix your rear main seal. We’ve looked at the best products to help you choose.

Here are the factors to consider when buying:

Type of Repair: You can choose between sealants or replacement seals. Sealants are easy to add to your oil and can fix minor leaks. Replacement seals are a more permanent fix but require more work to install.
Vehicle Compatibility: Always check if the repair product fits your specific car. Look at the year, make, model, and engine size. This ensures a perfect fit and effective repair.
Ease of Installation: Some products are DIY-friendly and can be added directly to your engine oil. Others, like replacement seals, might need professional installation. Consider your comfort level with car repairs.
Brand Reputation: Trusted brands often mean better quality and reliability. Companies with a long history in automotive parts usually offer dependable products.
Warranty: A warranty provides peace of mind. It shows the manufacturer stands behind their product. Look for at least a 1-year or 12,000-mile warranty.
Price and Value: Compare prices to find the best deal. Remember that a slightly higher cost might mean a longer-lasting and more effective repair.

Choosing the right rear main seal repair will save you money and keep your car running well.

What other car maintenance topics are you curious about?