M35x AWD V6-3.5L (VQ35DE) (2007)
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Piston Ring: Specifications
PISTON RING SIDE CLEARANCE
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Measure the side clearance of piston ring and piston ring groove with a feeler gauge.
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 (0.004 in)
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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
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Make sure that the cylinder bore inner diameter is within the specification.
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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 a feeler gauge.
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: 0.54 mm (0.0213 in)
2nd ring: 0.80 mm (0.0315 in)
Oil ring: 0.95 mm (0.0374 in)
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If the measured value exceeds the limit, replace piston ring, and measure again. If it still exceeds the limit, re-bore cylinder and use oversize piston
and piston rings.
