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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1353 (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 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Adjusting Valve Clearance
    GM859948Courtesy of GENERAL MOTORS CORP.
  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. See Special Tools and Equipment .
    3. IMPORTANT: To avoid unlocking the valve spring keeper, do not allow clearance between the valve retainer and J 45785-1  . See Special Tools and Equipment .
    Fig 2: Locking Valve Retainer With Screws
    GM859957Courtesy of GENERAL MOTORS CORP.
  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. See Special Tools and Equipment .
  4. Lock the set screw on the spark plug tube side of J 45785  . See Special Tools and Equipment .
    5. Fig 3: Rotating Crankshaft
    GM860014Courtesy of GENERAL MOTORS CORP.
  5. Rotate the crankshaft so the camshaft is positioned as shown.
    6. Fig 4: Lifting Rocker Arm And Valve Adjusting Shim
    GM860275Courtesy of GENERAL MOTORS CORP.
  6. Using J 45785-2  , lift the rocker arm and remove the valve adjusting shim. See Special Tools and Equipment .
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