Cylinder Block
A U T IO N !C
Cylinder Block Plug Installation
Installation Procedure Tools Required • J 41712 Oil Pressure Switch Socket
2. Apply sealant MCF P/N 2I4256 GM P/N 12346004 or equivalent to the outside diameter of the new front engine oil gallery plugs. 3. Install the new front engine block oil gallery plugs. A properly installed front engine oil gallery plug must be installed slightly below flush with the front face of the engine block.
Caution: Wear safety glasses in order to avoid eye damage. 1. Install a new oil filter bypass valve. a. Install the oil filter bypass valve into the oil gallery bore until slightly below flush with the surface of the engine block. b. Using a pointed punch, stake the engine block area around the oil filter bypass valve. Stake in 3 locations 120 degrees apart.
4. Install the spring type S pin (crankshaft rear oil seal housing locator) (if required).
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