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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 257 (Engine Mechanical - 4.0L (On-Vehicle)) >> Repair Instructions >> Secondary Camshaft Drive Chain Guide Replacement - Left >> Installation Procedure

Installation 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. Position the left secondary camshaft drive chain guide in through the top of the cylinder head.
    Fig 1: Positioning Left Secondary Camshaft Drive Chain Guide In Through Top Of Cylinder Head
    G01819390Courtesy of GENERAL MOTORS CORP.
  2. Loosely install the lower left secondary camshaft drive chain guide bolt.
    Fig 2: Installing Lower Left Secondary Camshaft Drive Chain Guide Bolt
    G01819391Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer toFASTENER NOTICE .
  3. Install the upper left secondary camshaft drive chain guide bolt.

    Tighten 

    Tighten the secondary camshaft drive chain guide bolts to 25 N.m (18 ft lbs).

    Fig 3: Install Upper Left Secondary Camshaft Drive Chain Guide Bolt
    G01819392Courtesy of GENERAL MOTORS CORP.
  4. Install the left secondary camshaft drive chain guide access plug (4) located in the cylinder head. Ensure the O-ring seal is attached to the access plug.

    Tighten 

    Tighten the secondary camshaft drive chain guide access plug to 4.5 N.m (40 in lbs).

    Fig 4: Installing Left Secondary Camshaft Drive Chain Guide Access Plug
    G01819393Courtesy of GENERAL MOTORS CORP.
  5. Install the left exhaust camshaft sprocket into the left secondary camshaft drive chain.
  6. Install the left exhaust camshaft sprocket onto the camshaft. The camshaft sprocket notch marked LE (left exhaust) engages the exhaust camshaft pin.
    Fig 5: Install Left Exhaust Camshaft Sprocket
    G01819394Courtesy of GENERAL MOTORS CORP.
  7. Use an open end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when tightening the camshaft sprocket bolt.
    Fig 6: Using Open End Wrench On Hex Cast
    G01819395Courtesy of GENERAL MOTORS CORP.
  8. Install the left exhaust camshaft sprocket bolt.

    Tighten 

    Tighten the camshaft sprocket bolt to 120 N.m (89 ft lbs).

    Fig 7: Install Left Exhaust Camshaft Sprocket Bolt
    G01819396Courtesy of GENERAL MOTORS CORP.
  9. Remove the J 44212  from the camshafts.
    10. Fig 8: Removing J 44212
    G01819397Courtesy of GENERAL MOTORS CORP.
  10. Install the left camshaft cover. Refer to Camshaft Cover Replacement - Left .
  11. Install the left secondary camshaft drive chain tensioner. Refer to Secondary Camshaft Drive Chain Tensioner Replacement - Left .
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