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 , Camshaft Timing Drive Chain Alignment Diagram , mark the timing chain and sprockets in order to ensure proper reassembly.

  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 .