Nissan 100NX N14 silhouetteN14

CYLINDER HEAD — Inspection (Using plastigage)

EM-225prose procedure

CD engine (CD20). Section tab marked 'CD' in top-right corner.

Using plastigage

  1. 1
    Wipe off oil from camshaft journal bracket caps and brackets.
  2. 2
    Install camshaft in journal bracket caps and put plastigage on each camshaft journal.
    Illustration of a camshaft journal area with cam bracket caps installed and studs/nuts visible. A strip of Plastigage is laid across the camshaft journal, labeled 'Plastigage' with a leader line pointing to it.
    SEM879
  3. 3
    Install cam bracket caps and tighten cam bracket cap nuts in the correct order to the specified torque.
    Tightening torque: 18 - 22 N·m (1.8 - 2.2 kg-m, 13 - 16 ft-lb)
  4. 4
    Remove cam bracket caps and measure maximum width of plastigage.
    Camshaft bearing clearance: Limit 0.1 mm (0.004 in)
    Illustration of a hand holding the Plastigage measurement scale/envelope against a cam bracket cap to measure the crushed Plastigage width against the printed gauge scale.
    SEM880
  5. 5
    If clearance appears to exceed the limit, replace camshaft or cylinder head.
    Which parts to be replaced should be decided upon after measuring the diameters of the parts concerned.
Cam bracket cap nut
18 - 22N·m
Camshaft bearing clearance limit(0.004 in)
0.1mm
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