Acura (Honda) Workshop Service and Repair Manuals

Piston: Specifications

DIMENSIONS

Piston Diameter [1]:

A (no letter):

Standard (New) .................................................................................................................................  92.990 - 93.003 mm (3.6610 - 3.6615 inch)
Service Limit ...................................................................................................................................................................  92.97 mm (3.6602 inch)

B:

Standard (New) .................................................................................................................................  92.980 - 92.993 mm (3.6606 - 3.6611 inch)
Service Limit ...................................................................................................................................................................  92.96 mm (3.6598 inch)

Piston Ring End-Gap:

Top Ring:

Standard (New) ..............................................................................................................................................  0.20 - 0.30 mm (0.008- 0.012 inch)
Service Limit .......................................................................................................................................................................  0.50 mm (0.020 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)

Piston To Block Clearance:

Standard (New) ...........................................................................................................................................  0.007 - 0.030 mm (0.0002 - 0.0012 inch)
Service Limit .......................................................................................................................................................................  0.0785 mm (0.0031 inch)

Ring-to-groove Clearances:

Top Ring Clearance

Standard (New) .....................................................................................................................................  0.035 - 0.065 mm (0.0014 - 0.0026 inch)
Service Limit .......................................................................................................................................................................  0.13 mm (0.005 inch)

Second Ring Clearance

Standard (New) .....................................................................................................................................  0.030 - 0.060 mm (0.0012 - 0.0024 inch)
Service Limit .......................................................................................................................................................................  0.13 mm (0.005 inch)

[1] Measured at 17 mm (0.67 inch) from the bottom of the skirt.