Isuzu Axiom 2002-05

Valve Lash (Clearance) Adjustment

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NOTE
Measure valve clearance with the engine cold.

  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Remove the valve covers.
  4.  
  5. Check the valve clearance with the camshafts positioned as shown. Intake valve clearance should be 0.0091-0.0130 inches. Exhaust valve clearance should be 0.0098-0.0138 inches.

    Click image to see an enlarged view

    Fig. Cross section of the 3.5L cylinder head. Note the position of the camshaft lobe (1), adjustment shim (2) and the tappet (3)

  6.  
  7. If adjustment is required, replace the shims as follows:
    1. Step 1: Position special tool J-42689 on the edge of the tappet.
    2.  
    3. Step 2: Rotate the crankshaft until the maximum lift portion of the camshaft lobe contacts the upper edge of the special tool and presses the tappet down to create enough clearance between the adjustment shim and the camshaft for the shim to be removed.
    4.  
    5. Step 3: Replace shims as necessary to achieve correct valve clearance.
    6.  
    7. Step 4: Repeat for each valve to be adjusted.

      Click image to see an enlarged view

      Fig. Valve clearance adjusting tool J-42689 (1)



      Click image to see an enlarged view

      Fig. Using the valve clearance adjusting tool to hold the tappet for shim replacement

    8.  

  8.  
  9. Replace the valve covers. Tighten the bolts to 80 inch lbs. (9 Nm).
  10.  

 
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