NSX-T V6-3.2L DOHC (VTEC) (1997)
Piston Ring: Testing and Inspection
End Gap
1. Using a piston, push a new ring into the cylinder bore 15 - 20 mm (0.6 - 0.8 inch) from the bottom.
2. Measure the piston ring end-gap with a feeler gauge:
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If the gap is too small, check to see if you have the proper rings for your engine.
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If the gap is too large, recheck the cylinder bore diameter against the wear limits. If the bore is over limit, the cylinder block must be rebored.
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Piston Ring End-Gap:
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Top Ring
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Standard (New): 0.20 - 0.30 mm (0.008- 0.012 inch)
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Service Limit: 0.50 mm (0.020 inch)
Second Ring
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Standard (New): 0.35 - 0.50 mm (0.014- 0.020 inch)
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Service Limit: 0.75 mm (0.03 inch)
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Oil Ring
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Standard (New): 0.20 - 0.70 mm (0.008 - 0.028 inch)
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Service Limit: 0.80 mm (0.031 inch)