Special Tools

J 39946 Crankshaft Socket - 4.0 L and 4.6 L

For equivalent regional tools, refer to Special Tools

1. Ensure the crankshaft is in the TDC position for the number one cylinder using the J 39946 socket .

Caution: Refer to Valve Lifter Priming Caution in the Preface section.




2. Fill the stationary hydraulic lash adjuster (SHLA) with clean engine oil GM P/N 12378006 or equivalent. Take precautions to prevent scratching the pivot sphere area (1) of the SHLA.
3. Lubricate the SHLA bores of the cylinder head with clean engine oil GM P/N 12378006 or equivalent.



4. Install the SHLAs.
5. Apply a liberal amount of lubricant GM P/N 12345001 or equivalent to the SHLA sphere.