Block and Piston Inspection

Piston Diameter 

1. Standard (New): 88.975-88.985 mm (3.5029-3.5033 in.)
2. Service Limit: 88.965 mm (3.5026 in.)

Oversize Piston Diameter 

1. 0.25: 89.225-89.235 mm (3.5128-3.5132 in.)
2. 0.50: 89.475-89.485 mm (3.52263.5230 in.)

Fig 1: Measuring Piston Diameter At Point 16.0 mm (0.63 in.) From Bottom Of Skirt

Courtesy of AMERICAN HONDA MOTOR CO., INC.

• If the measurements in any cylinder are beyond the oversize bore service limit, replace the cylinder block.
• If the block is to be rebored, refer to step  1 after reboring.

Fig 2: Measuring Wear & Taper In Directions X & Y At Three Levels In Each Cylinder

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Cylinder Bore Size 

1. Standard (New): 89.000 89.015 mm (3.5039 3.5045 in.)
2. Service Limit: 89.065 mm (3.5065 in.)

Oversize 

1. 0.25: 89.250 89.265 mm (3.5138-3.5144 in.)
2. 0.50: 89.500 89.515 mm (3.5236 3.5242 in.)

Bore Taper 

1. Limit: (Difference between first and third measurement) 0.05 mm (0.002 in.)
2. Reboring Limit: 0.5 mm (0.02 in.)

Cylinder Block Warpage 

1. Standard (New): 0.07 mm (0.003 in.) max.
2. Service Limit: 0.10 mm (0.004 in.)

Fig 3: Checking Tope Of Cylinder Block For Warpage

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 4: Measuring Edges & Across Center Of Cylinder Block

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Piston-to-Block Clearance 

1. Standard (New): 0.015 0.040 mm (0.0006-0.0016 in.)
2. Service Limit: 0.08 mm (0.003 in.)

Fig 5: Calculating Difference Between Cylinder Bore Diameter & Piston Diameter

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Oversize Piston Diameter 

1. 0.25: 89.225 89.235 mm (3.5128 3.5132 in.)
2. 0.50: 89.475-89.485 mm (3.5226 3.5230 in.)