Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSACURA1998NSX V6-3.2L DOHC (VTEC)REPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYPISTON RING, ENGINE
1998 Acura NSX V6-3.2L DOHC (VTEC)
Piston Ring, Engine
1998 Acura NSX V6-3.2L DOHC (VTEC)SECTION Piston Ring, Engine
Piston Ring End-Gap:
Top Ring
M/T:
Standard (New): 0.20 - 0.30 mm (0.008 - 0.012 inch)
Service Limit: 0.50 mm (0.020 inch)
A/T:
Standard (New): 0.25 - 0.40 mm (0.010 - 0.016 inch)
Service Limit: 0.60 mm (0.024 inch)
Second Ring
Standard (New): 0.35 - 0.50 mm (0.014 - 0.020 inch)
Service Limit: 0.75 mm (0.03 inch)
Oil Ring
Standard (New): 0.20 - 0.70 mm (0.008 - 0.028 inch)
Service Limit: 0.80 mm (0.031 inch)
Ring To Groove Clearance:
Top Ring Clearance
M/T:
Standard (New): 0.035 - 0.065 mm (0.0014 - 0.0026 inch)
Service Limit: 0.13 mm (0.005 inch)
A/T:
Standard (New): 0.030 - 0.055 mm (0.0012 - 0.0022 inch)
Service Limit: 0.13 mm (0.005 inch)
Second Ring Clearance
M/T:
Standard (New): 0.030 - 0.060 mm (0.0012 - 0.0024 inch)
Service Limit: 0.13 mm t0.005 inch)
A/T:
Standard (New): 0.030 - 0.055 mm (0.0012 - 0.0022 inch)
Service Limit: 0.13 mm (0.005 inch)
Top Ring Clearance
M/T:
Standard (New): 0.035 - 0.065 mm (0.0014 - 0.0026 inch)
Service Limit: 0.13 mm (0.005 inch)
A/T:
Standard (New): 0.030 - 0.055 mm (0.0012 - 0.0022 inch)
Service Limit: 0.13 mm (0.005 inch)
Second Ring Clearance
M/T:
Standard (New): 0.030 - 0.060 mm (0.0012 - 0.0024 inch)
Service Limit: 0.13 mm t0.005 inch)
A/T:
Standard (New): 0.030 - 0.055 mm (0.0012 - 0.0022 inch)
Service Limit: 0.13 mm (0.005 inch)
Piston Ring Dimensions:
Top Ring (Standard):
A: *1: 3.6 mm (0.14 inch)
*2: 3.3 mm (0.13 inch)
B: 1.2 mm (0.05 inch)
Second Ring (Standard):
A: *1: 3.75 mm (0.148 inch)
*2: 3.8 mm (0.15 inch)
B: 1.2 mm (0.05 inch)
*1: M/T
*2: A/T
Top Ring
M/T:
Standard (New): 0.20 - 0.30 mm (0.008 - 0.012 inch)
Service Limit: 0.50 mm (0.020 inch)
A/T:
Standard (New): 0.25 - 0.40 mm (0.010 - 0.016 inch)
Service Limit: 0.60 mm (0.024 inch)
Second Ring
Standard (New): 0.35 - 0.50 mm (0.014 - 0.020 inch)
Service Limit: 0.75 mm (0.03 inch)
Oil Ring
Standard (New): 0.20 - 0.70 mm (0.008 - 0.028 inch)
Service Limit: 0.80 mm (0.031 inch)
Ring To Groove Clearance:
Top Ring Clearance
M/T:
Standard (New): 0.035 - 0.065 mm (0.0014 - 0.0026 inch)
Service Limit: 0.13 mm (0.005 inch)
A/T:
Standard (New): 0.030 - 0.055 mm (0.0012 - 0.0022 inch)
Service Limit: 0.13 mm (0.005 inch)
Second Ring Clearance
M/T:
Standard (New): 0.030 - 0.060 mm (0.0012 - 0.0024 inch)
Service Limit: 0.13 mm t0.005 inch)
A/T:
Standard (New): 0.030 - 0.055 mm (0.0012 - 0.0022 inch)
Service Limit: 0.13 mm (0.005 inch)
Top Ring Clearance
M/T:
Standard (New): 0.035 - 0.065 mm (0.0014 - 0.0026 inch)
Service Limit: 0.13 mm (0.005 inch)
A/T:
Standard (New): 0.030 - 0.055 mm (0.0012 - 0.0022 inch)
Service Limit: 0.13 mm (0.005 inch)
Second Ring Clearance
M/T:
Standard (New): 0.030 - 0.060 mm (0.0012 - 0.0024 inch)
Service Limit: 0.13 mm t0.005 inch)
A/T:
Standard (New): 0.030 - 0.055 mm (0.0012 - 0.0022 inch)
Service Limit: 0.13 mm (0.005 inch)
Piston Ring Dimensions:
Top Ring (Standard):
A: *1: 3.6 mm (0.14 inch)
*2: 3.3 mm (0.13 inch)
B: 1.2 mm (0.05 inch)
Second Ring (Standard):
A: *1: 3.75 mm (0.148 inch)
*2: 3.8 mm (0.15 inch)
B: 1.2 mm (0.05 inch)
*1: M/T
*2: A/T
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.