Honda Civic. Manual — part 588

immediately to prevent rusting. Never use solvent, it will only redistribute the
grit on the cylinder walls.

4. If scoring or scratches are still present in the cylinder bores after honing the

engine block to the service limit, rebore the engine block. Some light vertical
scoring and scratching is acceptable if it is not deep enough to catch your
fingernail, and does not run the full length of the bore.

PISTON, PIN, AND CONNECTING ROD REPLACEMENT

Disassembly

1. Remove the piston from the engine block (see CRANKSHAFT AND

PISTON REMOVAL ).

2. Apply new engine oil to the piston pin snap rings (A), and turn them in the ring

grooves until the end gaps are lined up with the cutouts in the piston pin bores
(B).

Fig. 108: Identifying Piston Pin Snap Rings And Piston Pin Bores
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. Remove both snap rings (A). Start at the cutout in the piston pin bore. Remove

the snap rings carefully so they do not go flying or get lost. Wear eye
protection.

NOTE:

Take care not to damage the ring grooves.

2008 Honda Civic GX

2006-08 ENGINE Engine Block - Civic (Except Hybrid)

Fig. 109: Identifying Snap Rings
Courtesy of AMERICAN HONDA MOTOR CO., INC.

4. Heat the piston and connecting rod assembly to about 158°F (70°C), then

remove the piston pin.

Fig. 110: Heating Piston And Connecting Rod Assembly
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Inspection

1. Measure the diameter of the piston pin.

Piston Pin Diameter

Standard (New): 21.961-21.965 mm (0.8646-0.8648 in.)

NOTE:

Inspect the piston, piston pin, and connecting rod when
they are at room temperature.

2008 Honda Civic GX

2006-08 ENGINE Engine Block - Civic (Except Hybrid)

Service Limit: 21.953 mm (0.8643 in.)

Fig. 111: Measuring Diameter Of Piston Pin
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2. Zero the dial indicator to the piston pin diameter.

Fig. 112: Seating Dial Indicator To Piston Pin Diameter
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. Check the difference between the piston pin diameter and piston pin hole

diameter in the piston.

Piston Pin-to-Piston Clearance

Standard (New): -0.005 to +0.002 mm (-0.00020 to +0.00008 in.)

2008 Honda Civic GX

2006-08 ENGINE Engine Block - Civic (Except Hybrid)

Service Limit: 0.005 mm (0.0002 in.)

Fig. 113: Checking Difference Between Piston Pin Diameter And Piston
Pin Hole Diameter In Piston
Courtesy of AMERICAN HONDA MOTOR CO., INC.

4. Measure the piston pin-to-connecting rod clearance.

Piston Pin-to-Connecting Rod Clearance

Standard (New): 0.005-0.015 mm (0.0002-0.0006 in.)

Service Limit: 0.02 mm (0.0008 in.)

Fig. 114: Measuring Piston Pin-To-Connecting Rod Clearance
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Reassembly

2008 Honda Civic GX

2006-08 ENGINE Engine Block - Civic (Except Hybrid)