W 100 Pickup L6-225 3.7L (1984)
Crankshaft Main Bearing Seal: Service and Repair
Fig. 22 Lower oil seal and retainer. 6-225 (3.7L)
6-225 (3.7L)
When necessary to replace rear main bearing oil seal, removal of engine from vehicle or removal of crankshaft from engine block is not necessary.
Remove engine oil pan as described under ``Oil Pan, Replace,'' then the rear main bearing cap. Using oil seal replacement tool No. KD-492 or
equivalent, remove defective upper seal, then, using same tool, install new seal. After installation, trim upper seal to eliminate frayed ends. Install rear
main bearing cap, then the oil pan as described under ``Oil Pan, Replace.''
Replacement seals are of two piece rubber type composition which make possible the replacement of upper rear seal without removing crankshaft.
Both halves must be used. After removing oil pan, rear main bearing cap and seal retainer, pry lower seal from retainer with small screwdriver. On
models with rope type seal, screw a special tool into upper seal and carefully pull to remove seal while rotating crankshaft. On models with rubber
type seal, remove upper seal by pressing with a suitable screwdriver on end of seal, being careful not to damage crankshaft. Wipe crankshaft surface
clean, then oil lightly before installing new upper seal. After oiling seal lip, hold seal with paint stripe to rear tightly against crankshaft with thumb.
Carefully slide seal into groove in block making sure sharp edge does not shave or nick seal. Crankshaft may be rotated to ease seal into groove but
sealing lip must not be damaged. Install other half of seal into lower seal retainer again with paint stripe to rear, then install rear main bearing cap and
torque to specifications. Before installing seal retainer, apply a small amount of gasket sealer to mating surface of retainer but not on seal ends or seal
lip, Fig. 22. Install retainer and torque to 30 ft. lbs.
