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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 >> Secondary Camshaft Timing Sprocket Replacement - Left Exhaust >> 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 left camshaft cover. Refer to Camshaft Cover Replacement - Left .
  2. Rotate the crankshaft to TDC of the # 1 cylinder compression stroke using the J 43032  the flats machined into the rear of the camshafts should be parallel and facing the cylinder head.
  3. Use an open end wrench on the hex cast into the camshaft to aid in the installation of the J 42038. 
    Fig 1: Using Open End Wrench On Hex Cast Into Camshaft
    G01816778Courtesy of GENERAL MOTORS CORP.
    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
  4. Install the J 42038  to the rear of the camshafts on the left cylinder head.
    Fig 2: Installing J 42038
    G01816779Courtesy of GENERAL MOTORS CORP.
  5. Compress the left secondary drive chain tensioner shoes with your hand.
  6. Lock the left secondary drive chain tensioner by inserting a piece of wire (2) into the access hole in the side of the tensioner (1).
  7. Slowly release the pressure from the left secondary drive chain tensioner shoes. The tensioner should remain closed.
    Fig 3: Inserting Wire Into Tensioner Side Access Hole
    G01816780Courtesy of GENERAL MOTORS CORP.
  8. Remove the exhaust camshaft sprocket bolt.
  9. Remove the left exhaust secondary camshaft timing sprocket from the camshaft.
    Fig 4: Removing Exhaust Camshaft Sprocket Bolt
    G01816781Courtesy of GENERAL MOTORS CORP.
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