G 2500 3/4 Ton Van V6-262 4.3L VIN Z (1992)
Crankshaft Main Bearing Seal: Service and Repair
Fig. 35 Rear crankshaft oil seal
Fig. 36 Rear oil seal installation
The rear main seal used on these engines is a one-piece type, and is mounted in a special seal retainer, Fig. 35. Use the following procedure to replace
the rear oil seal on these models.
1.
Raise and support vehicle, then remove transmission and flex plate.
2.
Pry out seal with screwdriver, using notches provided in retainer. Take care not to mar crankshaft sealing surface when removing seal.
3.
Lubricate inner and outer diameter of replacement seal with engine oil, then install seal on tool J-35621, J-38841 or equivalent, Fig. 36.
4.
Thread screws of installation tool into rear of crankshaft, snugly tightening screws to ensure seal is square with crankshaft.
5.
Tighten wing nut on tool until it bottoms.
6.
Remove installation tool, tighten flex plate attaching bolts and bellhousing bolts to specification.
