K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Crankshaft Main Bearing Seal: Service and Repair
The production rear crankshaft oil seal is a rope type seal. The rope seal can be replaced with a two piece type seal, if desired. The CDR and
crankcase ventilation system should be thoroughly inspected and crankcase pressure should be checked before a new seal is installed.
1.
Remove oil pan and oil pump.
2.
Remove rear main bearing cap.
3.
Remove old rope seal from main bearing cap. Do not discard.
Fig. 14 Packing Upper Rear Crankshaft Rope Seal
Fig. 15 Cutting Rope Seal
Fig. 16 Installing Rope Seal Piece
4.
To install seal onto upper seal groove, proceed as follows:
a. Using rear oil seal packer tool No. J-33154-2 or equivalent, gently drive upper seal into groove approximately 1/4 inch. Do this on both side,
Fig. 14.
b. Measure the amount the seal was driven up on one side. Add 1/16 inch. Cut this length from the old seal removed from the old seal removed
from the main bearing cap. Use the main bearing cap as a holding tool when cutting the seal, Fig. 15. Use a sharp tool, repeat this procedure
for the other side.
c. Install rear oil seal packer tool No. J-33154-2 or equivalent, onto the cylinder block as shown in Fig. 16.
d. Use rear oil seal packer tool No. J-33154-2 or equivalent, to work the short pieces of the seal cut previously onto the guide tool and into the
