Rear Crankshaft Oil Seal
- Remove oil pan and oil pump. See OIL PAN. Remove rear main bearing cap. Remove lower half of seal from cap. Tap end of upper half of seal with a small drift punch to remove seal from block. Clean block surface and seal grooves.
- Lubricate new crankshaft seal lips with engine oil. Carefully insert end of one half of new seal into block seal groove. Push this piece into the groove until one end of seal extends 1/2" (13 mm) from block.
- Insert other half of seal into block seal groove. The contact ends of the seal halves will be at 4 and 10 o'clock, or 8 and 2 o'clock positions. This provides proper alignment of main cap with seal lips. Lightly coat seal groove of main bearing cap with Loctite (414).
- Apply a thin film of anaerobic sealant to bearing cap in specified areas. See Fig 1. Lightly oil the cap bolt threads. Tap main bearing cap into place with brass or leather mallet. Install cap bolts and tighten to specification. See TORQUE SPECIFICATIONS table. To install remaining components, reverse removal procedure.
Courtesy of GENERAL MOTORS CORP.