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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 429 (Engine Mechanical - 1.8L (LNK)) >> Repair Instructions >> On-Vehicle Repair Instructions >> Valve Lash Adjustment >> Valve Clearance Adjustment

Valve Clearance Adjustment

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn the crankshaft so the related rocker arm, where the valve clearance is to be adjusted, is fully pushed down.
  2. Install J 45785-1  onto the spark plug tube.
    Fig 1: Installing J45785-1
    G01546342Courtesy of GENERAL MOTORS CORP.

    Important:  To avoid unlocking the valve spring keeper, do not allow clearance between the valve retainer and J 45785-1  .

  3. Operate the lever on J 45785  so the tool seat surface comes to contact with the valve retainer and lock them with the set screw.
  4. Lock the set screw on the spark plug tube side of J 45785  .
    Fig 2: Locking Set Screws On J45785
    G01546343Courtesy of GENERAL MOTORS CORP.
  5. Rotate the crankshaft so the camshaft is positioned as shown.
    Fig 3: Positioning Camshaft
    G01546344Courtesy of GENERAL MOTORS CORP.
  6. Using J 45785  , remove the valve adjusting shim as follows:
  7. Lift the rocker arm and remove the valve adjusting shim.
    Fig 4: Removing Valve Adjusting Shim
    G01546345Courtesy of GENERAL MOTORS CORP.
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