Dorman Rear Main Seal Cover kit for engines — 635-518 die-cast aluminum, gasket & hardware

When an engine’s rear main seal or its cover fails, oil leaks can lead to messy garages and costly repairs. The Dorman 635-518 kit provides the components needed to replace the rear main seal cover with a part engineered to match original equipment fit and function. It combines a robust die-cast aluminum cover with updated sealing components and installation hardware to simplify the job and reduce the chance of recurring leaks.

How does this rear main seal cover kit match my vehicle’s original parts?

The kit is made to align with factory dimensions so bolt holes, sealing surfaces, and mounting points replicate the OEM cover. Dorman performs dimensional and performance checks to ensure the part installs properly and works with your engine’s original components.

• Die-cast aluminum cover sized to OEM specifications
• Included gasket precisely matches sealing flange layout
• Installation hardware aligned to original mounting arrangement

What components come in the Dorman 635-518 kit and why do they matter?

This kit supplies everything required to complete the rear main seal cover replacement in one package. Having the cover, a redesigned seal, a fresh gasket, and the fasteners reduces the risk of missing parts mid-repair and helps ensure consistent sealing performance after installation.

• Updated seal design to improve leak resistance
• New gasket to replace the original compressed or damaged seal surface
• Installation hardware to restore correct clamping and alignment

Will the Dorman cover hold up under normal driving and service conditions?

The cover is constructed from die-cast aluminum for durability and to maintain a stable sealing surface over time. Dorman subjects the part to testing procedures to verify fit and functionality, helping ensure the cover withstands typical engine heat cycles and vibration without premature failure.

• Die-cast aluminum resists warping and provides a consistent sealing face
• Validated through quality testing for reliable service life
• Hardware and gasket replacement reduce leak-prone wear points

How do I confirm this part fits my exact vehicle before buying?

Use the vehicle fitment tool on the product page to enter make, model, year, and trim so you can verify compatibility. Also check any fitment notes displayed (for example, the Amazon Confirmed Fit indicator) to review specific vehicle exceptions or installation details.

• Input full vehicle details into the garage/fitment tool
• Read fitment notes or information icons for exceptions or special instructions
• Consult vehicle service manual for removal and torque specifications

Who is this for: The Dorman 635-518 rear main seal cover kit is aimed at DIY mechanics, professional technicians, and anyone replacing a leaking rear main seal who wants a complete replacement assembly that mirrors factory fit. It’s ideal for repairs where the original cover or gasket has failed, offering a single-purchase solution with the cover, upgraded seal, gasket, and fasteners to streamline installation and help prevent repeat leaks.