ACDelco 12587621 Rear Crankshaft Oil Seal

The ACDelco 12587621 is a Genuine GM rear crankshaft oil seal designed to prevent oil leaks from the back of the engine crankshaft. This critical seal maintains proper engine lubrication by keeping oil contained within the engine block while allowing the crankshaft to rotate freely.

Key Features:

• Genuine GM part ensuring exact fit and optimal performance
• Precision-engineered seal prevents oil leakage at the rear main bearing
• Durable construction withstands high temperatures and continuous crankshaft rotation
• Direct replacement for worn or damaged original seal
• Helps maintain proper engine oil pressure and cleanliness

This rear main seal is a common wear item that may require replacement during transmission removal, clutch service, or when oil leaks are detected at the rear of the engine. ACDelco Genuine Parts meet or exceed GM's original equipment specifications for quality and reliability.