Dorman 635-557 Engine Rear Main Seal Cover

Engine Rear Main Seal Cover for Ford and Lincoln

Dorman 635-557 is a direct replacement engine rear main seal cover built to match the fit and function of the original equipment part. It is engineered for a reliable repair on a wide range of Ford, Lincoln, and Mercury applications, including Ford Escape, Explorer, Fusion, Focus, Mustang, Ranger, and Transit Connect models.

• Direct replacement rear main seal cover for OE-style fit and function
• Plastic construction with metallic gray finish
• Measures 8.3 in. long, 4 in. wide, and 0.125 in. thick
• Inside diameter: 3.6 in.
• Features 7 mounting holes with 0.2 in. hole diameter
• Compatible with a broad range of Ford, Lincoln, and Mercury vehicles

Detailed Product Information

This Dorman rear main seal cover is designed for engine rear main seal service where the original cover has worn, cracked, or no longer seals properly. The plastic construction and precise dimensions help support a proper seal at the rear of the engine block, while the metallic gray finish matches the appearance of the original component. Part number 635-557 is a practical OE-style replacement for vehicles such as Ford Escape, Ford Explorer, Ford Fusion, Ford Focus, Ford Mustang, and Lincoln MKZ.

Part number 635-557 also cross-references Bosch 67756 for the same application. If you are searching for a rear main seal cover for Ford Ranger, Ford Bronco Sport, or Lincoln Corsair applications, this part number is a relevant match to verify against your vehicle’s engine configuration.

What This Part Helps Address

• Rear main seal cover damage or cracking
• Oil leakage at the rear of the engine block
• Improper sealing after rear main seal service
• Fitment issues caused by a worn original cover
• Replacement needs on Ford, Lincoln, and Mercury rear main seal applications

Installation Notes and Tips

Confirm engine application and rear main seal cover dimensions before installation. Inspect the sealing surface, mounting holes, and surrounding engine components for wear or contamination before fitting the new cover. Because this part is a direct replacement, it should be installed in the same location and orientation as the original equipment cover on the applicable Ford, Lincoln, or Mercury engine.

Quality Assurance

Dorman states that this rear main seal cover has undergone extensive testing to meet precise design standards and to match original equipment fit and function. That testing supports consistent repair quality for compatible Ford, Lincoln, and Mercury applications.