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Valve Clearance: Checking

WARNING: This page is about a different car, the 2005 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

Perform inspection as follows after removal, installation or replacement of camshaft or valve related parts, or if there is unusual engine conditions regarding valve clearance.

NOTE: Check valve clearance while engine is cold and not running.
  1. Remove the intake manifold collectors. Refer to REMOVAL .
  2. Remove the ignition coils. Refer to REMOVAL AND INSTALLATION .
  3. Remove the rocker covers. Refer to REMOVAL AND INSTALLATION .
    Fig 1: Identifying Cylinder Locations
    G02475019Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Set No. 1 cylinder at TDC on its compression stroke.
    • Align pointer with TDC mark on crankshaft pulley.
      Fig 2: Aligning Pointer With TDC Mark On Crankshaft Pulley
      G02475020Courtesy of NISSAN MOTOR CO., U.S.A.
    • Check that the valve lifters on No. 1 cylinder are loose and valve lifters on No. 4 are tight. If not, turn the crankshaft one full revolution (360°) and align as shown.
      Fig 3: Checking For Proper Valve Lifter Alignment
      G02475021Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Check only the valves as shown.
    CRANK POSITION AND VALVE REFERENCE

    Crank Position Valve No. 1 Valve No. 2 Valve No. 3 Valve No. 6
    No. 1 TDC Intake Exhaust Exhaust Intake
    Fig 4: Identifying Cam Positions
    G02475022Courtesy of NISSAN MOTOR CO., U.S.A.
    • Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
    • Record any valve clearance measurements which are out of specification. They will be used later to determine the required replacement lifter size.
      • Valve Clearance for Checking (cold) 
      • Intake: 0.26 - 0.34 mm (0.010 - 0.013 in) 
      • Exhaust: 0.29 - 0.37 mm (0.011 - 0.015 in) 
      Fig 5: Measuring Clearance Between Valve Lifter & Camshaft
      G02475023Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Turn crankshaft 240°.
  7. Set No. 3 cylinder at TDC on its compression stroke.
  8. Check only those valves as shown.
    CRANK POSITION AND VALVE REFERENCE

    Crank Position Valve No. 2 Valve No. 3 Valve No. 4 Valve No. 5
    No. 3 TDC Intake Intake Exhaust Exhaust
    Fig 6: Identifying Cam Positions
    G02475024Courtesy of NISSAN MOTOR CO., U.S.A.
  9. Turn the crankshaft 240° and align as above.
  10. Set No. 5 cylinder at TDC on its compression stroke.
  11. Check only those valves as shown.
    CRANK POSITION AND VALVE REFERENCE

    Crank Position Valve No. 1 Valve No. 4 Valve No. 5 Valve No. 6
    No. 5 TDC Exhaust Intake Intake Exhaust
  12. If all valve clearances are within specification, installation of the remaining components is in the reverse order of removal. If the valve clearances are out of specification, adjust the valve clearances. Refer to "VALVE ADJUSTING ".
    Fig 7: Identifying Cam Positions
    G02475025Courtesy of NISSAN MOTOR CO., U.S.A.
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