Keep engine oil sealed at the back of the block with the Timken Engine Crankshaft Seal (P/N 5291). This rear crankshaft seal is a direct-fit replacement for a wide range of GM cars, including the 1982-1988 Buick Century, 1991-2005 Buick LeSabre, 1977-1990 Oldsmobile Delta 88, 1978-1987 Pontiac Grand Prix, and 1991-2005 Pontiac Bonneville — see the Buyer's Guide tab for the full 48-application list.
- Rear position: seals the rear of the crankshaft where it passes out of the engine block toward the transmission.
- Stationary seal: the seal body stays fixed while its sealing lip rides against the rotating crankshaft.
- Oil-side seal: helps retain engine oil and keep dirt and debris out of the seal area.
A worn rear crankshaft seal commonly shows up as engine oil seeping from the back of the engine, near the transmission bellhousing. If a failed rear seal is the source of the leak, replacing it with this Timken unit re-establishes the oil seal at that location; diagnose the cause first, since oil at the rear of the engine can also originate from other gaskets or seals.
Manufacturer part number 5291.
Frequently Asked Questions
What is the Timken 5291?
It's a rear engine crankshaft seal (rear main seal) that seals the rear of the crankshaft where it exits the engine block, helping keep engine oil contained.
Where is this seal located?
At the rear of the engine, sealing the crankshaft where it passes out of the block toward the transmission.
What are the signs my rear crankshaft seal may need replacing?
Engine oil seeping or dripping from the back of the engine near the bellhousing is a common sign the rear crankshaft seal may need replacing.
Does this seal rotate with the crankshaft?
No. The seal body stays stationary while its lip rides against the rotating crankshaft to contain the oil.
Will this fit my vehicle?
It fits 48 GM applications such as the 1982-1988 Buick Century, 1991-2005 Buick LeSabre, and 1977-1990 Oldsmobile Delta 88. Check the Buyer's Guide tab for the complete list.
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