Crankshaft Front Oil Seal Replacement for GMC Truck TopKick C-Series (Conventional) C4/C5 2003

Tools Required

J 42851 Front Cover Oil Seal Installer

1. Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement .

Important: Use care as not to damage the engine front cover or the crankshaft sealing area when removing the crankshaft front cover oil seal.

2. Remove the crankshaft front cover oil seal.

1. Coat the crankshaft front cover oil seal with clean engine oil.
2. Using J 42851 install the oil seal.
3. Remove the J 42851 .
4. Install the crankshaft balancer. Refer to Crankshaft Balancer Replacement .