Cookies and audience measurement
We use Google Analytics to measure how the site is used and to improve our content. It only loads with your consent: you can decline at no cost and change your mind at any time. Privacy policy
This post contains affiliate links. As an Amazon Associate we earn from qualifying purchases.
Our picks are based on Amazon bestseller rankings, Amazon customer ratings, and product availability. We update our recommendations regularly to ensure accuracy.
A reliable rear main seal set is crucial for preventing oil leaks from the engine's crankshaft. A failing seal can lead to significant oil loss, engine damage, and costly repairs. Ensuring you select a high-quality replacement set will protect your vehicle's performance and longevity.
【OE/Interchange Part number】:Replacement for GM 89060436 12639249, Replacement for BS 40640.
【Compatible with the following vehicles 】: Rear Mail Seal Gasket compatible with 4.8L 5.3L 5.7L 6.0L 6.2L GM Vortec engine, including Compatible with Chevrolet Silverado Suburban Tahoe Avalanche Colorado Camaro Express Trailblazer Caprice Impala GMC...
【High quality & durable 】 :Main Seal Gasket Set Meets or exceeds equipment specifications.It is highly durable and less prone to breakage. to provide exceptional service life and reliability. Gasket systems can withstand high pressures, high...
【What You'll get】: 1 Set of Rear Mail Gasket Seal & 1pair free installation gloves and 1 cleaning brush &12 Months Warranty. If you have any problems or concerns, please kindly send us mail any time, we are always here to provide you 100% satisfied...
[Fitment] This Rear Main Seal Cover designed for LS Based LS1 LS2 LS3 LS6 LM7 LQ4 LQ9 4.8L 5.3L 5.7L 6.0L 6.2L Engines 1997-2013, Replace 12639250 12633579 635-518. Compatible with Chevy, GMC, and Cadillac models, such as Silverado 1500, Avalanche...
[Prevent Oil Leaks] Precision-crafted from cast aluminum for durability and heat resistance, this ls rear cover features wear-resistant construction to protect your engine long-term. The complete kit includes all necessary gaskets and bolts for a...
[Package Include] 1x Rear Main Seal Cover, 1x Gasket, 12x Bolts
[Easy Installation] Meet OE specifications for great fitment, our rear main seal cover and gaskets ensures quick and hassle-free installation.
OEM Replacement Accuracy: Engineered for Exact Fit and Seal Integrity Replaces OEM numbers 12612350, 12637683, OS30693R, PG3165, 12558760, OS32241, OS21006, OS6315P, 16792, 2005-481851, 343885, 257778, OS6315, B32790, and 635-518 (Rear Main Seal...
Broad Vehicle Compatibility: 635-518 Rear Main Seal Kit fits for GM 4.8L–6.2L V8 Engines from 1999–2020 Perfect fit for Chevy Silverado, Suburban, Tahoe, Avalanche, Trailblazer, Camaro, Express, Impala; GMC Sierra, Yukon, Envoy, Savana, Canyon...
Comprehensive Upgrade: 635-518 Rear Main Seal Kit includes the rear main seal assembly, providing a complete lower engine sealing solution. Ideal for rebuilds, oil leak repair, or preventive maintenance
Premium Materials: Durable, Heat-Resistant, and Oil-Tight Construction, Crafted from high-grade nitrile rubber and metal-reinforced materials to withstand extreme heat, pressure, and oil exposure. Delivers long-lasting durability and leak-proof protection
OEM Replacement Accuracy: Engineered for Exact Fit and Seal Integrity Replaces OEM numbers 12612350, 12637683, OS30693R, PG3165, 12558760, OS32241, OS21006, OS6315P, 16792, 2005-481851, 343885, 257778, OS6315, B32790;635-518 (Rear Main Seal), TCS...
Broad Vehicle Compatibility: This LS Engine Oil Leak Repair Kit fits for GM 4.8L–6.2L V8 Engines from 1999–2020 Perfect fit for Chevy Silverado, Suburban, Tahoe, Avalanche, Trailblazer, Camaro, Express, Impala; GMC Sierra, Yukon, Envoy, Savana...
Complete Engine Sealing Kit:Includes rear main seal (635-518), oil pan gasket (12612350), timing cover gasket set, and camshaft retainer plate gasket. Designed to address multiple common oil leak points in one repair.
Premium Materials: Durable, Heat-Resistant, and Oil-Tight Construction.Crafted from high-grade nitrile rubber and metal-reinforced materials to withstand extreme heat, pressure, and oil exposure. Delivers long-lasting durability and leak-proof protection.
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
All in One Set Design: OE number CS5975A CS9284, this package includes 1x Oil Pan Gasket Set OS30693R, 1x Gen III Valley Cover Gasket 12558178, 2x Water Pump Gasket ES73010, 1x Oil Pan Cover Gasket 12611384, 1x Front Cover Seal 12585673, 1x Rear Cover...
Compatibility: this set is compatible with 4.8L 5.3L 5.7L 6.0L LS1 LS2 LS3 LS4 LS5 LS6 V8 Engine for Chevrolet Silverado, Suburban, Tahoe, Avalanche, Colorado, Camaro, Express, Trailblazer, Caprice, for GMC Sierra, Yukon, Savana, Envoy, Canyon, for...
The design of the complete gasket set aims to ensure sealing between engine components, preventing leaks of lubricating oil, coolant, and fuel while maintaining compression gases within the combustion chamber, thus ensuring the normal operation and...
High durability: It is highly durable and not easily damaged. Advanced manufacturing technology ensures durability and optimal performance at both high and low temperatures. Brand New Product 100% Factory Tested.
SEALED WELL: It securely seals the oil pan so that oil leaks will be prevented each time it pools lubricant oil as it goes to the cylinder head's drain back opening. Aside from oil, this gasket also helps prevent the entry of other harmful materials to...
LONG-SERVICE: It is less prone to breakage. to provide exceptional service life.
WITHSTAND HARSH CONDITIONS: Advanced manufacturing technology ensures durability and optimum operation in higher or lower temperatures.
PROFESSIONAL CUSTOMER SERVICE: Vincos has the professional production technology.We inspected every product before sending out,to ensure you have the best quality product,and the best value.If you have any problem please contact us.For more effectively...
Last update on 2026-10-16 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Automotive Replacement Rear Main Gasket Sets
Material Quality
Look for sets made from durable materials like high-grade rubber or silicone. These materials offer better resistance to heat, oil, and wear, ensuring a longer lifespan and a more effective seal.
Avoid materials that are known to degrade quickly or become brittle over time, as this will lead to premature failure.
Vehicle Compatibility
Always verify that the rear main seal set is specifically designed for your vehicle's make, model, and year. Using an incompatible part can result in poor fitment and ineffective sealing.
Check the product description carefully for compatibility information, including engine type and specific part numbers.
Some sets include additional components like wear sleeves or installation tools, which can be beneficial depending on the condition of your crankshaft.
Frequently Asked Questions
What are the signs of a failing rear main seal?
Common indicators include oil leaks originating from the rear of the engine, often visible on the transmission bellhousing. You might also notice a burning oil smell due to oil dripping onto hot exhaust components.
Can I replace the rear main seal myself?
Replacing a rear main seal is a complex job that typically requires removing the transmission and flywheel. It demands specialized tools and mechanical expertise, so it's often best left to experienced mechanics.
How long does a rear main seal typically last?
The lifespan of a rear main seal can vary depending on driving conditions, oil quality, and material. However, they are generally designed to last for the life of the vehicle, often exceeding 100,000 miles.
Are there different types of rear main seals?
Yes, the most common types are one-piece and two-piece seals. One-piece seals are integrated into a single unit, while two-piece seals consist of two halves that fit around the crankshaft. Compatibility with your specific engine is key.
As an Amazon Associate, we earn from qualifying purchases. Product prices and availability are accurate as of the date/time indicated and are subject to change.
Before You Go!
Get the latest deals and product comparisons delivered to your inbox.
