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Valve Clearance: Inspection

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. 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. arm up the engine. Then stop the engine.
  2. Remove the air cleaner and resonator assembly. Refer to "EXPLODED VIEW ".
  3. Remove the RH bank and LH 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: Identifying Crankshaft Pulley, TDC Identification Notch, Timing Indicator And White Paint Mark
    G04899696Courtesy of NISSAN NORTH AMERICA, INC.
  5. At this time, make sure both the intake and exhaust cam noses of No. 1 cylinder (top front on LH bank) face outside.
    • If they do not face outside, turn crankshaft pulley once more.
      Fig 2: Locating Intake And Exhaust Cam Noses Of No. 1 Cylinder
      G04899697Courtesy of NISSAN NORTH AMERICA, INC.
  6. Measure valve clearances at the locations marked "x" as shown in the table below (locations indicated with black arrow).
    • <=: Engine front
    • <= (black): Measurable at No. 1 cylinder compression top dead center
    • <= (white): Measurable at No. 3 cylinder compression top dead center
    • A: RH
    • B: LH
    • C: Exhaust
    • D: Intake
    NOTE: Firing order 1-8-7-3-6-5-4-2
    • No. 1 cylinder compression TDC
      Measuring position (RH bank) No. 2 cyl (E) No. 4 cyl (F) No. 6 cyl (G) No. 8 cyl (H)
      No. 1 cylinder at TDC EXH       x
      INT x x    
      Measuring position (LH bank) No. 1 cyl (J) No. 3 cyl (K) No. 5 cyl (L) No. 7 cyl (M)
      No. 1 cylinder at TDC INT x   x  
      EXH x     x
      Fig 3: Identifying Intake And Exhaust Valve Clearances Measuring Locations
      G04899754Courtesy of NISSAN NORTH AMERICA, INC.
    • Measure valve clearance using suitable tool. Refer to "STANDARD AND LIMIT ".
    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.
  7. Turn the crankshaft pulley clockwise 270° from the position of No. 1 cylinder compression TDC to obtain No. 3 cylinder compression TDC.
    Fig 4: Checking Clearance Between Valve Lifter And Camshaft Using Feeler Gauge
    G04899755Courtesy of NISSAN NORTH AMERICA, INC.
  8. Measure valve clearances at the locations marked "x" as shown in the table below (locations indicated with white arrow).
    • <=: Engine front
    • <= (black): Measurable at No. 1 cylinder compression top dead center
    • <= (white): Measurable at No. 3 cylinder compression top dead center
    • A: RH
    • B: LH
    • C: Exhaust
    • D: Intake
    NOTE: Firing order 1-8-7-3-6-5-4-2
    • No. 3 cylinder compression TDC
      Measuring position (RH bank) No. 2 cyl (E) No. 4 cyl (F) No. 6 cyl (G) No. 8 cyl (H)
      No. 3 cylinder at TDC EXH   x    
      INT       x
      Measuring position (LH bank) No. 1 cyl (J) No. 3 cyl (K) No. 5 cyl (L) No. 7 cyl (M)
      No. 3 cylinder at TDC INT   x   x
      EXH   x x  
      Fig 5: Identifying Intake And Exhaust Valve Clearances Measuring Locations
      G04899754Courtesy of NISSAN NORTH AMERICA, INC.
    • Measure valve clearance using suitable tool. Refer to "STANDARD AND LIMIT ".
    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 6: Checking Clearance Between Valve Lifter And Camshaft Using Feeler Gauge
    G04899755Courtesy of NISSAN NORTH AMERICA, INC.
  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 (G) and the exhaust valve clearance of No. 2 cylinder (E).
    • <=: Front
    • A: RH
    • B: LH
    • C: Exhaust
    • D: Intake
    • E: No. 2 cylinder
    • F: No. 4 cylinder
    • G: No. 6 cylinder
    • H: No. 8 cylinder
    • J: No. 1 cylinder
    • K: No. 3 cylinder
    • L: No. 5 cylinder
    • M: No. 7 cylinder
      Fig 7: Identifying Intake And Exhaust Valve Clearances Measuring Locations
      G04899754Courtesy of NISSAN NORTH AMERICA, INC.
  10. If out of specifications, adjust as necessary.
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