Best Rear Main Seals

Are you looking for the best rear main seals to keep your engine running smoothly and leak-free? We offer a curated list of top-rated, durable options to make finding the perfect seal for your vehicle an easy and hassle-free experience.

Rear main seals are crucial for keeping your engine leak-free and running smoothly. A failed seal can lead to costly repairs and frustrating oil leaks. Choosing the right replacement ensures your vehicle stays reliable and efficient.

We’ve tested and reviewed the best rear main seals on the market to save you time and hassle. From OEM-quality parts to affordable kits, we’ve got you covered. Whether you drive a Subaru, Chevy, or Ford, there’s a perfect match for your needs.

Discover top-rated options that offer durability, easy installation, and leak prevention. Let’s find the ideal seal to keep your engine protected and performing at its best.

List of Top 10 Rear Main Seals

Title	Best For	Price
Dorman 635-518 Engine Rear Main Seal Cover	This complete repair kit is perfect for car owners seeking a reliable fix. It offers a simple solution for engine leaks.	View on Amazon (paid link)
A-Premium Engine Rear Main Seal Cover Kit [OHV 4.8 5.3 5.7 6.0 6.2 7.0L]	This A-Premium Engine Rear Main Seal Cover Kit is perfect for anyone with a Chevrolet, GMC, Hummer, Isuzu, Pontiac, Saab, Buick, or Cadillac vehicle. It fits many models from 1997 to 2020, so it’s great for keeping your engine running smoothly.	View on Amazon (paid link)
LS Rear Main Seal Cover & Gasket Bolts For 1997-2013 V8 Engines	This product is perfect for car owners with 1997-2013 V8 engines who want to prevent oil leaks and ensure a smooth engine rebuild. It’s ideal for those seeking easy installation and reliable performance.	View on Amazon (paid link)
LABLT 635-518 Rear Main Seal Kit 4.8 5.3 6.0 6.2 Replacement for 12633579 12639250	This rear main seal kit is perfect for car owners who need a reliable replacement for their engine seal. It’s ideal for those with 4.8, 5.3, 6.0, or 6.2 engines looking for a durable, leak-free solution.	View on Amazon (paid link)
Engine Rear Main Seal Cover Kit with Gasket & Bolt Compatible with Cadillac Escalade, GMC Yukon Sierra, Chevy Suburban Silverado Tahoe Express 4.8 5.3 6.0 6.2L Replace# 635-518 12633579 12639250	This item is for car owners with old trucks and SUVs who need a strong repair. It fits many GM models like the Chevy, GMC, and Cadillac very well.	View on Amazon (paid link)
marddpair Rear Main Seal Kit 635-518 Replacement for Chevy Silverado Camaro Replacement for Savana 4.8L 5.3L 6.0L	This marddpair Rear Main Seal Kit is perfect for car owners who need a reliable replacement for their Chevy, GMC, or Buick vehicles. It’s ideal for those with 4.8L, 5.3L, or 6.0L engines looking for a durable fix.	View on Amazon (paid link)
Bar’s Leaks Rear Main Seal Repair, 16.9 oz	This product is perfect for anyone with an oil leak. It’s easy to use and works fast to stop leaks in your engine.	View on Amazon (paid link)
Subaru Rear Main Seal for WRX STI Legacy Forester Impreza Outback Baja – 806786040 – Genuine OEM	This Genuine Subaru Rear Main Seal is perfect for Subaru owners who want reliable, long-lasting performance. It fits popular models like the WRX STI, Legacy, Forester, Impreza, Outback, Baja, SVX, and Tribeca, ensuring a perfect fit for your vehicle.	View on Amazon (paid link)
FEL-PRO BS 40619 Engine Crankshaft Seal Kit for 1995-2010 Ford Explorer	This FEL-PRO BS 40619 Engine Crankshaft Seal Kit is perfect for Ford Explorer owners who need a reliable replacement part. It’s also great for DIY mechanics working on compatible Ford, Land Rover, or Mercury vehicles.	View on Amazon (paid link)
FEL-PRO BS 40737 Engine Crankshaft Seal Kit	The FEL-PRO BS 40737 Engine Crankshaft Seal Kit is perfect for Ram and Chrysler owners who need a reliable, high-quality repair solution. It’s designed to fit specific models and meets all original equipment standards, ensuring a perfect fit and trusted performance.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 Rear Main Seals handpicked for quality, durability, and value. Each product is expert-reviewed and backed by customer feedback to ensure reliable performance. Whether you need a leak-free repair or a perfect fit, this guide has you covered. Find the best seal to keep your engine running smoothly and save time and money.

1. Dorman 635-518 Engine Rear Main Seal Cover

The Dorman 635-518 Engine Rear Main Seal Cover is a direct replacement for your vehicle. It matches the factory design and includes everything you need for a leak-free repair. The updated seal design ensures superior leak prevention.

This kit features a durable die-cast aluminum timing cover and comes with a new gasket and installation hardware. It’s quality tested for a long service life and easy fit.

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.	No tools included, so you’ll need your own for installation. Not universal, must check fit carefully before buying. Aluminum cover may dent or damage if handled roughly.

Perfect For:

This complete repair kit is perfect for car owners seeking a reliable fix. It offers a simple solution for engine leaks.

Ready to Purchase?

View Price on Amazon (paid link)

Best Oversize Piston Sets: Boost Power and Engine Efficiency

2. A-Premium Engine Rear Main Seal Cover Kit [OHV 4.8 5.3 5.7 6.0 6.2 7.0L]

The A-Premium Engine Rear Main Seal Cover Kit is perfect for OHV engines in sizes 4.8 to 7.0L. It fits many popular vehicles, including Chevrolet, GMC, Hummer, and more.

This kit is built to last and easy to install. It meets high standards for quality and performance. Buy with confidence thanks to a one-year unlimited-mileage guarantee.

Key specs include a 2.7-inch inside diameter, 10-inch length, and 6-inch width. A-Premium ensures peace of mind for all your automotive needs.

Pros	Cons
Fits many Chevy and GMC trucks and SUVs Works on big 4.8 to 7.0L engines Comes with a 1-year warranty for peace of mind Matches your car with exact reference numbers Durable seal cover for long lasting use	No tools included, adding extra cost for installation. One-year warranty may not cover long-term use. Limited vehicle compatibility despite extensive fitment list.

Perfect For:

This A-Premium Engine Rear Main Seal Cover Kit is perfect for anyone with a Chevrolet, GMC, Hummer, Isuzu, Pontiac, Saab, Buick, or Cadillac vehicle. It fits many models from 1997 to 2020, so it’s great for keeping your engine running smoothly.

Ready to Purchase?

View Price on Amazon (paid link)

3. LS Rear Main Seal Cover & Gasket Bolts For 1997-2013 V8 Engines

Stop oil leaks and protect your engine with this rear main seal cover kit. It’s made for LS engines from 1997 to 2013.

Crafted from cast aluminum, this cover resists heat and wear. The kit includes gaskets and bolts for a tight, leak-free seal.

Easy to install, it fits perfectly like the original. ARMKER’s team is ready to help with any questions.

Pros	Cons
Fits 1997-2013 V8 engines, prevents oil leaks. Durable cast aluminum, wear-resistant for long-term protection. Complete kit with gaskets and bolts for leak-proof seal. Easy installation, meets OE specifications for perfect fit.	No tools included, so you’ll need your own for installation. Not compatible with non-LS engines, limiting vehicle options. Aluminum material may dent or damage if handled roughly.

Perfect For:

This product is perfect for car owners with 1997-2013 V8 engines who want to prevent oil leaks and ensure a smooth engine rebuild. It’s ideal for those seeking easy installation and reliable performance.

Ready to Purchase?

View Price on Amazon (paid link)

4. LABLT 635-518 Rear Main Seal Kit 4.8 5.3 6.0 6.2 Replacement for 12633579 12639250

The LABLT 635-518 Rear Main Seal Kit is a reliable replacement for your vehicle. It fits 4.8, 5.3, 6.0, and 6.2 engines. This kit replaces 12633579 and 12639250 parts.

Made of die-cast aluminum, it ensures no leakage and a long service life. The quality is tested to meet high standards.

The package includes 1 rear main seal kit. Double-check your part number before buying to ensure a perfect fit.

Pros	Cons
No leaks, long-lasting performance with die-cast aluminum construction. Extensively tested for top-notch quality and reliability. Easy fit for 4.8, 5.3, 6.0, 6.2 engines—perfect replacement. Complete kit includes everything needed for a quick install.	Not universal, check compatibility before buying. No installation tools included in the package. Aluminum material may not suit all engine types.

Perfect For:

This rear main seal kit is perfect for car owners who need a reliable replacement for their engine seal. It’s ideal for those with 4.8, 5.3, 6.0, or 6.2 engines looking for a durable, leak-free solution.

Ready to Purchase?

View Price on Amazon (paid link)

5. Engine Rear Main Seal Cover Kit with Gasket & Bolt Compatible with Cadillac Escalade, GMC Yukon Sierra, Chevy Suburban Silverado Tahoe Express 4.8 5.3 6.0 6.2L Replace# 635-518 12633579 12639250

Engine Rear Main Seal Cover Kit with Gasket & Bolt Compatible with Cadillac Escalade, GMC Yukon Sierra, Chevy Suburban Silverado Tahoe Express 4.8 5.3 6.0 6.2L Replace# 635-518 12633579 12639250

This engine seal cover kit protects your motor. It stops costly leaks. You enjoy a perfect fit.

It fits many GM trucks and cars. The strong aluminum fights rust. You get great durability.

It replaces parts like 635-518. Check your fitment for a safe install.

Pros	Cons
Fits many Chevy, GMC, Cadillac models, ensuring compatibility. High-quality aluminum for long-lasting durability and corrosion resistance. OEM specifications guarantee a perfect fit every time. Easy installation with included gasket and bolt.	No installation tools included, so you’ll need to buy them separately. Not compatible with all vehicle models, check before buying. May require professional installation, adding to the overall cost.

Perfect For:

This item is for car owners with old trucks and SUVs who need a strong repair. It fits many GM models like the Chevy, GMC, and Cadillac very well.

Ready to Purchase?

View Price on Amazon (paid link)

6. marddpair Rear Main Seal Kit 635-518 Replacement for Chevy Silverado Camaro Replacement for Savana 4.8L 5.3L 6.0L

The marddpair Rear Main Seal Kit is a reliable replacement for many popular vehicles. It fits models like the Chevy Silverado, Camaro, and Tahoe, as well as others. This kit ensures a tight seal for your engine.

It has the part number 635-518 and works with engines like 4.8L, 5.3L, and 6.0L. The size is 2.7 inches inside and 10 inches long. Always check compatibility before buying.

Easy to install, but follow the warning. Center the parts before fixing screws. Compare old parts to ensure a match.

Pros	Cons
Perfect fit for Chevy, GMC, and Buick models. Exact replacement with part numbers 635-518, 12633579, 12639250. Easy installation with clear warning for precise alignment. Durable and reliable for long-lasting performance.	No installation tools included, so you’ll need to buy them separately. Requires precise alignment for proper fit, which can be tricky. Compatibility check is your responsibility, so double-check before buying.

Perfect For:

This marddpair Rear Main Seal Kit is perfect for car owners who need a reliable replacement for their Chevy, GMC, or Buick vehicles. It’s ideal for those with 4.8L, 5.3L, or 6.0L engines looking for a durable fix.

Ready to Purchase?

View Price on Amazon (paid link)

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

Bar’s Leaks Rear Main Seal Repair is a powerful solution for stubborn oil leaks. It seals multiple areas, including the rear main, timing cover, and cam seal. Just add it to your engine oil for quick results.

This 16.9 oz bottle is easy to use. Pour the entire contents into your engine crankcase during or between oil changes. Avoid overfilling for best results.

Most leaks stop within 100 miles or 2 days of driving. It’s specifically designed for rear main leaks but works great on all leaks. Save time and money with this reliable fix.

Pros	Cons
Stops hard-to-fix oil leaks fast and easy. Works better than regular stop leaks. Just add to engine oil, no hassle. Seals rear main and other leaks quickly.	Takes driving time to stop leaks. Won’t fix severely broken parts. Requires careful oil level checks.

Perfect For:

This product is perfect for anyone with an oil leak. It’s easy to use and works fast to stop leaks in your engine.

Ready to Purchase?

View Price on Amazon (paid link)

8. Subaru Rear Main Seal for WRX STI Legacy Forester Impreza Outback Baja – 806786040 – Genuine OEM

Keep your Subaru running smoothly with this genuine rear main seal. It’s designed to fit 1990 and newer models, ensuring a perfect match. Trust this OEM part for lasting performance.

This seal works for Impreza, WRX, Forester, Legacy, Outback, Baja, SVX, and Tribeca. It’s easy to install and built to last. Choose this part for reliable engine protection.

Save time and money by using this factory-approved seal. It’s durable and dependable, just like your Subaru. Keep your car in top shape with this essential part.

Pros	Cons
Genuine OEM part for perfect fit and performance. Durable seal prevents leaks and engine damage. Fits multiple Subaru models, 1990 to 2017. Reliable quality for long-lasting engine protection.	Limited to specific Subaru models and years. No installation tools or instructions included. Genuine OEM means higher cost than aftermarket options.

Perfect For:

This Genuine Subaru Rear Main Seal is perfect for Subaru owners who want reliable, long-lasting performance. It fits popular models like the WRX STI, Legacy, Forester, Impreza, Outback, Baja, SVX, and Tribeca, ensuring a perfect fit for your vehicle.

Ready to Purchase?

View Price on Amazon (paid link)

9. FEL-PRO BS 40619 Engine Crankshaft Seal Kit for 1995-2010 Ford Explorer

The FEL-PRO BS 40619 Engine Crankshaft Seal Kit is a reliable solution for your vehicle’s needs. It’s designed to fit specific Ford, Land Rover, Mercury, and Mazda models, ensuring a perfect match.

This kit meets or exceeds original equipment standards. It’s engineered for repairs, offering trusted quality and easy installation.

Pros	Cons
Perfect fit for your Ford Explorer and other compatible vehicles. Meets or exceeds original equipment specs for reliable performance. Engineered specifically for repair applications, ensuring unsurpassed quality. Easy installation with application-specific design for hassle-free repairs.	Must verify vehicle specs before ordering Need to check fit for your car Might not fit specific trim or engines

Perfect For:

This FEL-PRO BS 40619 Engine Crankshaft Seal Kit is perfect for Ford Explorer owners who need a reliable replacement part. It’s also great for DIY mechanics working on compatible Ford, Land Rover, or Mercury vehicles.

Ready to Purchase?

View Price on Amazon (paid link)

10. FEL-PRO BS 40737 Engine Crankshaft Seal Kit

The FEL-PRO BS 40737 Engine Crankshaft Seal Kit is built for specific vehicles. It fits many Ram and Chrysler models. This kit ensures a perfect match.

Its design meets high standards. It works like the original parts. You can trust its quality.

This kit is made for repairs. It is tested for fit and function. Get reliable performance every time.

Pros	Cons
Fits many Ram trucks Fits many Chrysler cars Fits exactly as needed Meets all original specs Quality parts you trust	Limited to specific vehicle models and years. No installation tools or instructions included. Higher cost compared to generic seal kits.

Perfect For:

The FEL-PRO BS 40737 Engine Crankshaft Seal Kit is perfect for Ram and Chrysler owners who need a reliable, high-quality repair solution. It’s designed to fit specific models and meets all original equipment standards, ensuring a perfect fit and trusted performance.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Rear main seals keep your engine leak-free and running smoothly. A failed seal can lead to costly repairs and frustrating oil leaks. Choosing the right replacement ensures your vehicle stays reliable and efficient.

Finding the perfect rear main seal doesn’t have to be hard. We’ve tested and reviewed the best options to save you time and hassle. Whether you drive a Subaru, Chevy, or Ford, there’s a perfect match for your needs. Let’s dive into what makes a great seal and how to pick the right one.

Factors to Consider When Buying Rear Main Seals

Compatibility:
Make sure the seal fits your vehicle’s make and model. Check the engine size and part number for a perfect match.
Material Quality:
Look for durable materials like die-cast aluminum or OEM-grade rubber. These ensure longevity and leak prevention.
Ease of Installation:
Choose a seal that’s easy to install. Kits with included hardware and clear instructions save time and effort.
Leak Prevention:
A reliable seal stops oil leaks. Look for updated designs or factory-approved parts for superior performance.
Brand Reputation:
Trust well-known brands like Dorman, A-Premium, or FEL-PRO. They offer quality-tested products with guarantees.
Price and Value:
Balance cost with quality. Affordable kits are great, but don’t compromise on durability or performance.
Warranty:
A good warranty gives peace of mind. Look for one-year guarantees or unlimited-mileage coverage.
Additional Features:
Some seals come with gaskets, bolts, or repair solutions. These extras can save time and money.

With these factors in mind, you’re ready to find the ideal rear main seal for your vehicle. Keep your engine protected and performing at its best!