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Valve Lash Adjustment

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Aligning Crankshaft Sprocket Mark With Pointer On Oil pump Housing
    GM897052Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Adjust the valves only when the cylinder head temperature is less than 38°C (100°F).
  1. Rotate the crankshaft to align the mark (2) on the sprocket (237) with the pointer (1) on the oil pump housing.
    2. Fig 2: Aligning Mark On The Crankshaft Balancer With Pointer On Front Cover
    GM897035Courtesy of GENERAL MOTORS CORP.
  2. Rotate the crankshaft balancer and align the white mark (1) on the balancer with the locating tab (2) on the front cover.
    3. Fig 3: Aligning The Upper Cover Mark With Mark On Camshaft (Number 1 Cylinder)
    GM897041Courtesy of GENERAL MOTORS CORP.
  3. Inspect cylinder number 1 for top dead center (TDC) position. The mark (2) on the front cover should be aligned with the mark (1) on the sprocket.
    4. Fig 4: View Of Valve Rocker Arm Cover
    GM897124Courtesy of GENERAL MOTORS CORP.
  4. Identify the adjusting bolt (216) and nut (217) locations.
    5. Fig 5: View Of Feeler Gage Between The Adjusting Screws & The Ends Of The Valve Stems
    GM897277Courtesy of GENERAL MOTORS CORP.
  5. Select the proper thickness feeler gage.

    Specification: 

    • Intake valve adjustment: 0.2-0.24 mm (0.008-0.009 in)
    • Exhaust valve adjustment: 0.28-0.32 mm (0.011-0.013 in)

  6. Insert a feeler gage (1) between the adjusting screws (216) and the ends of the valve stems for cylinder number 1. Slide the feeler gage back and forth, adjusting the screws, until you feel a slight amount of drag. If you feel too much drag, loosen the locknut and turn the adjusting screw (216) until the drag on the feeler gage is correct.
  7. Tighten the locknut and inspect the clearance again. Repeat the adjustment, if necessary.
    8. Fig 6: View Of The Adjusting Cylinder Number 4 Valve Clearance
    GM897280Courtesy of GENERAL MOTORS CORP.
  8. Rotate the engine clockwise and position number 4 piston at TDC. Align the mark (2) on the front cover with the TDC mark (1) on the sprocket.
  9. Inspect and adjust cylinder number 4 valve clearance, as required.
    10. Fig 7: View Of The Adjusting Cylinder Number 2 Valve Clearance
    GM897278Courtesy of GENERAL MOTORS CORP.
  10. Rotate the engine and position number 2 piston at TDC. Align the mark (2) on the front cover with the TDC mark (1) on the sprocket.
  11. Inspect and adjust cylinder number 2 valve clearance, as required.
    12. Fig 8: View Of The Adjusting Cylinder Number 5 Valve Clearance
    GM897281Courtesy of GENERAL MOTORS CORP.
  12. Rotate the engine and position number 5 piston at TDC. Align the mark (2) on the front cover with the TDC mark (1) on the sprocket.
  13. Inspect and adjust cylinder number 5 valve clearance, as required.
    14. Fig 9: View Of The Adjusting Cylinder Number 3 Valve Clearance
    GM897279Courtesy of GENERAL MOTORS CORP.
  14. Rotate the engine and position number 3 piston at TDC. Align the mark (2) on the front cover with the TDC mark (1) on the sprocket.
  15. Inspect and adjust cylinder number 3 valve clearance, as required.
    16. Fig 10: View Of The Adjusting Cylinder Number 6 Valve Clearance
    GM897282Courtesy of GENERAL MOTORS CORP.
  16. Rotate the engine and position number 6 piston at TDC. Align the mark (2) on the front cover with the TDC mark (1) on the sprocket.
  17. Inspect and adjust cylinder number 6 valve clearance, as required.
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