Nissan ENGINE - Page 114

EM-114
< UNIT DISASSEMBLY AND ASSEMBLY >
[VQ40DE]
ENGINE UNIT
• Measure side clearance of piston ring and piston ring groove with
feeler gauge.
• If the measured value exceeds the limit, replace piston ring, and measure again. If it still exceeds the limit,
replace piston also.
PISTON RING END GAP
• Make sure that the cylinder bore inner diameter is within the speci-
fication. Follow the "Cylinder Bore Inner Diameter" procedure.
• Lubricate with new engine oil to piston and piston ring, and then
insert piston ring until middle of cylinder with piston, and measure
the piston ring end gap with feeler gauge.
• If the measured value exceeds the limit, replace piston ring, and measure again.
CONNECTING ROD BEND AND TORSION
• Check with connecting rod aligner.
• If it exceeds the limit, replace connecting rod assembly.
CONNECTING ROD DIAMETER (BIG END)
Standard:
Top ring : 0.045 - 0.080 mm (0.0018 - 0.0031 in)
2nd ring : 0.030 - 0.070 mm (0.0012 - 0.0028 in)
Oil ring : 0.065 - 0.135 mm (0.0026 - 0.0053 in)
Limit:
Top ring : 0.11 mm (0.0043 in)
2nd ring : 0.10 mm (0.0039 in)
SEM024AA
Standard:
Top ring : 0.23 - 0.33 mm (0.0091 - 0.0130 in)
2nd ring : 0.33 - 0.48 mm (0.0130 - 0.0189 in)
Oil ring : 0.20 - 0.50 mm (0.0079 - 0.0197 in)
Limit:
Top ring : 0.56 mm (0.0220 in)
2nd ring : 0.68 mm (0.0268 in)
Oil ring : 0.85 mm (0.0335 in)
PBIC0118E
Bend:
Limit: 0.15 mm (0.0059 in) per 100 mm (3.94 in) length
Torsion:
Limit: 0.30 mm (0.0118 in) per 100 mm (3.94 in) length
PBIC2077E
Revision: January 2013 2013 Xterra