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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 615 (Engine Mechanical) >> Periodic Maintenance >> Camshaft Valve Clearance >> Valve Clearance >> Checking

Valve Clearance: Checking

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Check valve clearance while engine is cold and not running.
NOTE: Perform valve clearance inspection after removal, installation or replacement of camshaft or valve parts, or as necessary.
  1. Remove the rocker cover (bank 1) and rocker cover (bank 2). Refer to Removal and Installation (Bank 1)  (Bank 1) and Removal and Installation (Bank 2) (Bank 2).
  2. Set No. 1 cylinder at TDC on its compression stroke.
    G04073027Courtesy of NISSAN NORTH AMERICA, INC.
    • Align pointer (A) with TDC mark (0 deg.) on crankshaft pulley.
      G08768737Courtesy of NISSAN NORTH AMERICA, INC.
    • 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 deg.) and align as shown, below.
      G04072918Courtesy of NISSAN NORTH AMERICA, INC.
  3. Check only the valves as shown, below.
    G04159788Courtesy of NISSAN NORTH AMERICA, INC.

    Crank Position

    Valve No. 1

    Valve No. 2

    Valve No. 3

    Valve No. 6

    No. 1 TDC

    Intake

    Exhaust

    Exhaust

    Intake
    • Using suitable tool, measure the clearance between the valve lifter and camshaft.
      G04073030Courtesy of NISSAN NORTH AMERICA, INC.

      Valve clearance

      : Refer to Camshaft .
    • Record any valve clearance measurements which are out of specification. They will be used later to determine the required replacement lifter size.
      G04132280Courtesy of NISSAN NORTH AMERICA, INC.
  4. Turn crankshaft 240 deg..
  5. Set No. 3 cylinder at TDC on its compression stroke.
  6. Check only those valves as shown, below.
    G04159791Courtesy of NISSAN NORTH AMERICA, INC.

    Crank Position

    Valve No. 2

    Valve No. 3

    Valve No. 4

    Valve No. 5

    No. 3 TDC

    Intake

    Intake

    Exhaust

    Exhaust
  7. Turn the crankshaft 240 deg. and align as above.
  8. Set No. 5 cylinder at TDC on its compression stroke.
  9. Check only those valves as shown, below.
    G04159792Courtesy of NISSAN NORTH AMERICA, INC.

    Crank Position

    Valve No. 1

    Valve No. 4

    Valve No. 5

    Valve No. 6

    No. 5 TDC

    Exhaust

    Intake

    Intake

    Exhaust
  10. Perform adjustment if the measured values are out of the specification range.
  11. Installation of components is in the reverse order of removal.
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