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Home >> Pontiac >> 2009 >> G3 Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 67 (Engine Mechanical - 1.6L (LDE, LLU, And LXV) Or 1.8L (2H0) - Repair Instructions - On Vehicle) >> Valve Clearance Adjustment >> Measurement

Valve Clearance Adjustment: Measurement

WARNING: This page is about a different car, the 2010 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .
    2. Fig 1: Aligning Crankshaft Pulley & Cover
    GM2049370Courtesy of GENERAL MOTORS CORP.
  2. Rotate the crankshaft pulley clockwise, aligning the notches (1) between the pulley and the cover.
    3. Fig 2: Identifying Valve Clearance Positions
    GM2049546Courtesy of GENERAL MOTORS CORP.
  3. Measure the valve clearance at positions (2) and (6). Rotate the crankshaft pulley clockwise 180 degrees.
  4. Measure the valve clearance at positions (3) and (7). Rotate the crankshaft pulley clockwise 180 degrees.
  5. Measure the valve clearance at positions (4) and (8). Rotate the crankshaft pulley clockwise 180 degrees.
  6. Measure the valve clearance at positions (1) and (5). Rotate the crankshaft pulley clockwise 180 degrees.
  7. If the measured values are not within specifications, replace the valve tappets.

    Specifications: 

    • Intake Side: 0.21-0.29 mm (Nominal Value: 0.25 mm)
    • Exhaust Side: 0.27-0.35 mm (Nominal Value: 0.30 mm)

  8. Determine the tappet size. Refer to Determining Replacement Tappet Size.
  9. Replace the valve tappets if necessary. Refer to Cylinder Head Disassemble .
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