Nissan 100NX N14 silhouetteN14

Cylinder Block - Disassembly (Cont'd) / Inspection

EM-145prose procedure

Oil jets are SR20DET only.

Continued from EM-144

Disassembly (Cont'd)

  1. 9
    Remove baffle plate.
    Cutaway view of the cylinder block showing the baffle plate and oil jets locations. An arrow at top-left labeled 'Engine front' indicates orientation. Callouts point to 'Baffle plate' at top and 'Oil jets (SR20DET only)' at the four cylinder bores.
    SEM810D
  2. 10
    Remove oil jets. (SR20DET only)

Inspection

Piston and Piston Pin Clearance

  1. 1
    Measure inner diameter of piston pin hole "dp".
    Standard diameter "dp": 21.987 - 21.999 mm (0.8656 - 0.8661 in)
    Illustration of a dial bore gauge measuring the inner diameter of the piston pin hole 'dp' in a piston.
    SEM149B
  2. 2
    Measure outer diameter of piston pin "Dp".
    Standard diameter "Dp": 21.989 - 22.001 mm (0.8657 - 0.8662 in)
    Illustration of a micrometer measuring the outer diameter 'Dp' of a piston pin. The micrometer is labeled 'Micrometer'.
    SEM821B
  3. 3
    Calculate piston pin clearance. dp - Dp = -0.004 to 0 mm (-0.0002 to 0 in). If it exceeds the above value, replace piston assembly with pin.

PISTON RING SIDE CLEARANCE

Side clearance: Top ring
0.045 - 0.080mm (0.0018 - 0.0031 in)
Side clearance: 2nd ring
0.030 - 0.065mm (0.0012 - 0.0026 in)
Max. limit of side clearance
0.2mm (0.008 in)
If out of specification, replace piston and/or piston ring assembly.
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