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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 406 (Engine Mechanical - 3.5L (On-Vehicle)) >> Repair Instructions >> Primary Camshaft Drive Chain Tensioner Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the camshaft covers. Refer to Camshaft Cover Replacement - Left  and Camshaft Cover Replacement - Right  .
  2. Rotate the crankshaft to TDC of the # 1 cylinders compression stroke using the J 43032,  the flats machined into the rear of the camshafts should be parallel and facing the cylinder head.
    WARNING: The camshaft holding tools must be installed on the camshafts to prevent camshaft rotation. When performing service to the valve train and /or timing components, valve spring pressure can cause the camshafts to rotate unexpectedly and can cause personal injury
  3. Install the J 42038  to the rear of the camshafts on the left and right cylinder heads.
  4. Remove the engine front cover. Refer to Engine Front Cover Replacement .
    Fig 1: Identifying J 42038
    G01816812Courtesy of GENERAL MOTORS CORP.
  5. Loosen both primary timing chain tensioner bolts.
  6. Remove the lower primary timing chain tensioner bolt allowing the tensioner to swing downward and expand. This will release tension on the primary drive chain.
  7. Remove the upper tensioner bolt.
  8. Remove the primary drive chain tensioner (1).
    Fig 2: Removing Primary Drive Chain Tensioner
    G01816813Courtesy of GENERAL MOTORS CORP.
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