GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 902847  Size: SH
  1. Remove the spark plugs in order to ease crankshaft/engine rotation. Refer to Spark Plug Replacement.
  2. Remove the engine front cover. Refer to Engine Front Cover Replacement.
  3. Important: If the entire camshaft timing system is not in Stage 2, mark the timing chain and sprockets in order to ensure proper reassembly. Refer to Camshaft Timing Drive Chain Alignment Diagram.

  4. Remove the primary camshaft drive chain tensioner. Refer to Primary Camshaft Drive Chain Tensioner Removal.

Installation Procedure


    Object Number: 902847  Size: SH
  1. Install the primary camshaft drive chain tensioner. Refer to Primary Camshaft Drive Chain Tensioner Installation.
  2. Install the spark plugs. Refer to Spark Plug Replacement.
  3. Install the engine front cover. Refer to Engine Front Cover Replacement.