Crankshaft Front Oil Seal Installation (LS3 with Z52 Option, LS7, LS9)
Special Tools
- EN-47812: Installer Bolt
- J 41478: Crankshaft Front Oil Seal Installer - for models without a keyed crankshaft
- J 41478-1A:
Crankshaft Front Oil Seal Installer Cone - for models with or without a keyed crankshaft
For equivalent regional tools, refer to Special Tools
- Do not lubricate the oil seal sealing surface.
- Do not use the crankshaft front oil seal again.
- Lubricate the outer edge of the oil seal (140) with clean engine oil.
- Lubricate the front cover oil seal bore with clean engine oil.
- For models with a keyed crankshaft, install the crankshaft front oil seal (140) using the following procedure:
- Assemble the EN-47812: bolt (1), nut, washer, the J 41478-1A: installer cone (2), and oil seal, and install into the end of the crankshaft.
- Use a wrench and hold the hex on the installer bolt.
- Use a second wrench and rotate the installer nut clockwise until the seal bottoms in the cover bore.
- Remove the tool and inspect the oil seal for proper installation. The oil seal should be installed evenly and completely into the front cover bore.
- For models without a keyed crankshaft, install the crankshaft front oil seal (140) using the following procedure:
- Assemble the EN-47812: bolt (1), nut, washer, the J 41478: installer guide (2) or the J 41478-1A: installer cone (2), and oil seal, and install into the end of the crankshaft.
- Use a wrench and hold the hex on the installer bolt.
- Use a second wrench and rotate the installer nut clockwise until the seal bottoms in the cover bore.
- Remove the tool and inspect the oil seal for proper installation. The oil seal should be installed evenly and completely into the front cover bore.
NOTE: Either J 41478: installer guide or J 41478-1A: installer cone will install the seal on models without a keyed crankshaft.
NOTE: