Ensuring your vehicle runs smoothly relies on every component performing optimally, and the main seal is no exception. A properly functioning main seal prevents vital fluids from leaking out, protecting your engine and transmission from damage. Choosing the right replacement seal is crucial for long-term reliability and performance.
- Direct replacement - this rear main seal cover kit matches the factory design, and includes a new gasket, installation hardware, and an updated seal design for superior leak prevention
- Durable construction - the timing cover in this kit is made of die-cast aluminum for a leak-free fit and durability
- Convenient solution - this kit includes a new gasket and installation hardware for a complete repair
- Quality tested - this part has undergone extensive testing to ensure a quality fit and long service life
- Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
- Please check the “Amazon Confirmed Fit” bar at the top of this page before buying product to ensure this product works for your vehicle. If the “Amazon Confirmed Fit” bar has an “i” in a blue circle, this product has additional notes. Please...
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![A-Premium Engine Rear Main Seal Cover Kit [OHV 4.8 5.3 5.7 6.0 6.2 7.0L]](https://m.media-amazon.com/images/I/41gRkRB2CrL._SL160_.jpg "The Best Automotive Replacement Main Seals 5")
- [Vehicle Fitment-1]: ①Compatible with Chevrolet Avalanche 02-13 // Camaro 98-15 // Caprice 11-12 // Colorado 09-12 // Corvette 97-12 // Express 1500 Van 03-14 // Express 2500 Van 03-20 // Express 3500 Van 03-20 // Express 4500 Van 09-20 // Impala...
- [Vehicle Fitment-2]: ②fits for Chevy Silverado 2500 99-04, Silverado 2500 HD 0120-, Silverado 2500 HD Classic 07 // Silverado 3500 01-06, Silverado 3500 Classic 2007, Silverado 3500 HD 07-20 // SSR 03-06 // Suburban 18-20 // Suburban...
- [Vehicle Fitment-3]: ④fits for GMC Savana 1500 Van 03-14 // Savana 2500 Van 03-20 // Savana 3500 Van 03- // Savana 4500 09- // Sierra 150 99-13 // Sierra 1500 Classic 2007 // Sierra 1500 HD 01-06 // Sierra 1500 HD Classic 07 // Sierra...
- [Vehicle Fitment-4]: ⑤fits for Hummer H2 2003-2009 // H3 2008-2010 // H3T 2009-2010 ⑥fits for Isuzu NPR 2003-2016 // NPR-HD 2003-2016 ⑦fits for Pontiac Pontiac 1998-2002 // G8 2008-2009 // Grand Prix 2005-2008 // GTO 2004-2006 ⑧fits for Saab 9-7X...
- [Specifications]: Reference Number: 635-518, 12633579, 12639250, 12615666, 12598301, 500323RSH, SK635518, 8-12572-014-0, 8-12598-301-0, 8-12614-813-0, 8-12633-579-0, 8-12639-250-0 ①Inside Diameter (in): 2.7 in; ②Length (In): 10 in; ③Width (in...
- Manufacturer part number: 635-518
- Made of die-cast aluminum, no leakage, long service life
- The part has been extensively tested to ensure quality
- Note: Please double-check that it is the part you need before purchasing
- Package Includes: 1 x rear main seal kit
- Direct replacement - this rear main seal cover matches the fit and function of the original equipment cover for a trouble-free installation
- Durable construction - this rear main seal cover is made of quality materials for a reliable fit and enduring service life
- Convenient solution - get a quality repair solution without the hassle of buying original equipment
- Quality tested - this part has undergone extensive testing to ensure a quality fit and long service life
- Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
- [FITMENT] Compatible with 2012-2013 Chevy Tahoe, 2012-2013 Chevy Suburban 1500, 2013 Chevy Silverado 1500, 2012 Chevy Express 1500, 2014 Chevy Silverado 2500 HD, 2014 Chevy Express 2500, 2012 2013 2014 2018 Chevy Express 3500, 2012 Chevy Avalanche...
- [REPLACE PART NUMBER] 635-518, 12633579, 12639250.Please check the part number and fitment before placing order.
- [DURABLE CONSTRUCTION] The rear main seal cover kit is made of die-cast aluminum for a leak-free fit and durability.
- [FEATURE] The rear main seal cover kit includes a new gasket, installation hardware, and an updated seal design to ensures leak-free.
- [QUALITY ASSURANCE] High quality and rigorous testing. Our rear main seal cover kit has undergone rigorous testing and inspecting to ensure all performance parameters meet the standard.
- Design type: springless; multi-lip
- Temperature range: -100°F to 450°F / -73°C to 232°
- Excellent dry running capabilities
- Low coefficient of friction
- Delivers quality and reliable performance for every type of repair
- Material: Polytetrafluoroethylene
- Design type: Spring loaded; multi-lip
- Temperature range: Minus 100 degree Fahrenheit to 450 degree Fahrenheit
- Provides excellent dry running capabilities, low coefficient of friction, and excellent resistance to chemicals
- Resistant to hydrocarbon/oxygenate blends and provides superior performance
- Genuine Subaru Rear Main Seal for your 1990 and newer Subaru 806786040
- 1993-2011 Subaru Impreza 2002-2014 Subaru WRX 2004-2017 Subaru WRX STi
- 1998-2013 Subaru Forester
- 1990-2012 Subaru Legacy 2000-2012 Subaru Outback
- 2003-2006 Subaru Baja 1992-1997 Subaru SVX 2006-2008 Tribeca
- Direct replacement - this rear main seal cover matches the fit and function of the original equipment cover for a trouble-free installation
- Durable construction - this rear main seal cover is made of quality materials for a reliable fit and enduring service life
- Convenient solution - get a quality repair solution without the hassle of buying original equipment
- Quality tested - this part has undergone extensive testing to ensure a quality fit and long service life
- Ensure fit - Input your vehicle into the garage tool and check Confirmed Fit bar at the top of the page. If there is an “i” in a blue circle, additional verification is needed. Please hover over the "i" to verify fitment notes match your vehicle
- THIS IS BRAND NEW: DNJ® Rear Main Seal
- FITS: 86-11 Ford, Mercury, Mazda, Land Rover 2.9L-4.0L V6 SOHC, OHV Naturally Aspirated
- WARRANTY TYPE: 1 year or 12,000-mile DNJ® limited warranty.
- DNJ Engine Components is a full line provider of Domestic & Japanese engine parts for cars and trucks.
- We carefully selected DNJ Engine Components as the sole provider. DNJ has a 30+ year track record of quality, experience, and trust. It makes sense for us to carry a brand that would help us earn customer loyalty in the long run
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Last update on 2026-09-01 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Automotive Replacement Main Seals
Understanding Main Seals
The main seal, often referred to as the rear main seal or front main seal depending on its location, is a critical component designed to prevent oil from leaking out of the engine or transmission at the crankshaft. When these seals wear out, oil can leak onto the clutch, flywheel, or exhaust system, leading to potential damage and safety hazards. Replacement is necessary when leaks are detected or as part of a preventative maintenance schedule.
Types of Main Seals
Main seals are typically made from materials like rubber (nitrile, viton) or PTFE (polytetrafluoroethylene). Rubber seals are common and cost-effective but can degrade over time due to heat and oil exposure. PTFE seals, often seen in one-piece designs, offer superior heat and chemical resistance and can provide a more durable seal, especially in high-performance applications. The original equipment manufacturer (OEM) often specifies a particular type, but aftermarket options may offer enhanced durability.
Key Features to Consider
When selecting a replacement seal, consider the material composition for durability and resistance to engine oil and heat. The seal's design, whether it's a traditional two-piece rubber seal or a modern one-piece lip seal, can impact installation and sealing effectiveness. Ensure the seal is compatible with your vehicle's specific make, model, and year. Some seals may come with installation tools or helpful guides, which can be beneficial for DIY repairs.
Installation and Maintenance Tips
Replacing a main seal is often a labor-intensive job, typically requiring the engine or transmission to be removed. It's advisable to have this repair performed by a qualified mechanic unless you have significant automotive repair experience. After installation, monitor for any signs of leaks and check your oil levels regularly. Using the correct type and amount of engine oil, as specified by your vehicle manufacturer, will also help prolong the life of the new seal.
Comparison Tips
- Material: Compare seals made from nitrile for general use versus Viton or PTFE for higher heat and oil resistance.
- Design: Evaluate one-piece lip seals against traditional two-piece seals for potential differences in sealing performance and ease of installation.
- Brand Reputation: Research brands known for producing reliable automotive components. Look for seals with good reviews regarding longevity and fitment.
- Vehicle Specificity: Always confirm that the seal is designed for your exact vehicle's year, make, and model to ensure proper fit and function.
