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Valve Clearance: Inspection

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Perform the following inspection after removal, installation or replacement of camshaft or valve-related parts, or if there are unusual engine conditions due to changes in valve clearance over time (starting, idling, and/or noise).
  1. Warm up the engine. Then stop the engine.
  2. Remove the engine cover, battery cover and air duct assembly. Refer to "REMOVAL AND INSTALLATION ", "REMOVAL " and "REMOVAL AND INSTALLATION ".
  3. Remove the right bank and left bank rocker covers using power tool. Refer to "REMOVAL AND INSTALLATION ".
  4. Turn the crankshaft pulley in the normal direction (clockwise when viewed from engine front) to align TDC identification notch (without paint mark) with timing indicator.
    Fig 1: Turning Crankshaft Pulley To Align TDC Identification Notch (No Paint) With Timing Indicator
    G02384493Courtesy of NISSAN MOTOR CO., U.S.A.
  5. At this time, make sure both the intake and exhaust cam noses of No. 1 cylinder (top front on left bank) face outside.
    • If they do not face outside, turn crankshaft pulley once more.
    Fig 2: Verifying Both Intake And Exhaust Cam Noses Of No. 1 Cylinder Face Outside
    G02384494Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Measure valve clearances at the locations marked "X" as shown in the figure below (locations indicated with black arrow).
    NOTE: Firing order 1-8-7-3-6-5-4-2
    • No. 1 cylinder compression TDC
      Fig 3: Valve Clearance Measurement Locations Chart
      G02384495Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 4: Identifying Valve Clearance Measurement Locations (Black Arrow)
      G02384496Courtesy of NISSAN MOTOR CO., U.S.A.
    • Measure valve clearances using suitable tool.
      1. Valve clearance standard: 
        1. Hot* 
          1. Intake: 0.304 - 0.416 mm (0.012 - 0.016 in) 
          2. Exhaust: 0.308 - 0.432 mm (0.012 - 0.017 in) 
        2. Cold 
          1. Intake: 0.26 - 0.34 mm (0.010 - 0.013 in) 
          2. Exhaust: 0.29 - 0.37 mm (0.011 - 0.015 in) 
      2. *: Approximately 80°C (176°F) 
      CAUTION: If the inspection was carried out with a cold engine, make sure the values with a fully warmed up engine are still within specifications.
    Fig 5: Measuring Valve Clearances Using Suitable Tool
    G02384497Courtesy of NISSAN MOTOR CO., U.S.A.
  7. Turn the crankshaft pulley clockwise by 270° from the position of No. 1 cylinder compression TDC to obtain No. 3 cylinder compression TDC.
  8. Measure valve clearances at the locations marked "X" as shown in the figure below (locations indicated with white arrow).
    • No. 3 cylinder compression TDC
    Fig 6: Valve Clearance Measurement Locations Chart
    G02384498Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 7: Identifying Valve Clearance Measurement Locations (White Arrow)
    G02384499Courtesy of NISSAN MOTOR CO., U.S.A.
  9. Turn the crankshaft pulley clockwise 90° from the position of No. 3 cylinder compression TDC (clockwise by 360° from the position of No. 1 cylinder compression TDC) to measure the intake and exhaust valve clearances of No. 6 cylinder and exhaust valve clearance of No. 2 cylinder.
    Fig 8: Identifying Valve Clearance Measurement Locations (White Arrow)
    G02384500Courtesy of NISSAN MOTOR CO., U.S.A.
  10. If out of specifications, adjust as necessary, Refer to "ADJUSTMENT ":
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