Whats the proper procedure for replacing the rear main seal in a 4.0 manual 5 sp.

MICHAELKINNAMON

MEMBER
1999 JEEP WRANGLER
120,000 MILES

Replacing rear main seal (on the ground) of a factory height 1999 wrangler sport 4.0, what would be the proper procedure of execution?

Monday, August 20th, 2012 AT 10:04 PM

1 Reply

KHLOW2008

MECHANIC
41,814 POSTS

REAR CRANKSHAFT OIL SEAL

Removal

Remove transmission inspection cover. Remove oil pan. Remove main
bearing cap brace. Remove rear main bearing cap, and push upper seal from groove. Ensure crankshaft is not damaged. Remove lower half of seal from bearing cap.

Installation

1. Clean surface of crankshaft. Apply thin coat of oil to crankshaft and seal lip. Position upper seal into groove in cylinder block so lip of seal faces front of engine. Place lower half into bearing cap.

2. Coat both ends of lower seal end tabs with sealant. DO NOT apply sealant to lip of seal. Coat outer curved surface of lower seal with soap. Coat lip of seal with engine oil. Position lower seal into bearing cap recess and seat firmly. Coat both chamfered edges of rear main bearing cap with sealant. DO NOT apply sealant to mating surfaces of bearing cap or cylinder block.

3. Install rear main cap in original position. Tighten bolts in 3 stages to specification. To install remaining components, reverse removal procedure.