Honda Civic. Manual — part 587

0.25: 86.230-86.240 mm (3.3949-3.3953 in.)

Fig. 103: Measuring Piston Diameter Point From Bottom Of Skirt
Courtesy of AMERICAN HONDA MOTOR CO., INC.

4. Measure the wear and taper in direction X and Y at three levels in each

cylinder as shown. If the measurements in any cylinder are beyond the
Oversize Bore Service Limit, replace the engine block. If the engine block is
being rebored, refer to step 7 after reboring.

Cylinder Bore Size

Standard (New):

A or I: 86.010-86.020 mm (3.3862-3.3866 in.)

B or II: 86.000-86.010 mm (3.3858-3.3862 in.)

Service Limit: 86.070 mm (3.3886 in.

2008 Honda Civic GX

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

Oversize

0.25: 86.250-86.260 mm (3.3957-3.3961 in.)

Reboring Limit: 0.25 mm (0.01 in.) max.

Bore Taper

Limit: (Difference between first and third measurement) 0.05 mm (0.002
in.)

Fig. 104: Identifying Wear And Taper Direction X And Y Three Levels In
Each Cylinder
Courtesy of AMERICAN HONDA MOTOR CO., INC.

5. Scored or scratched cylinder bores must be honed.
6. Check the top of the engine block for warpage. Measure along the edges, and

across the center as shown.

Engine Block Warpage

2008 Honda Civic GX

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

Standard (New): 0.07 mm (0.003 in.) max.

Service Limit: 0.10 mm (0.004 in.)

Fig. 105: Identifying Top Of Engine Block For Warpage
Courtesy of AMERICAN HONDA MOTOR CO., INC.

7. Calculate the difference between the cylinder bore diameter and the piston

diameter. If the clearance is near or exceeds the service limit, inspect the piston
and cylinder bore for excessive wear.

Piston-to-Cylinder Bore Clearance

Standard (New): 0.020-0.040 mm (0.0008-0.0016 in.)

Service Limit: 0.05 mm (0.002 in.)

2008 Honda Civic GX

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

Fig. 106: Identifying Difference Between Cylinder Bore Diameter And
Piston Diameter
Courtesy of AMERICAN HONDA MOTOR CO., INC.

CYLINDER BORE HONING

Only a scored or scratched cylinder bore must be honed.

1. Measure the cylinder bores (see BLOCK AND PISTON INSPECTION ). If

the engine block is to be reused, hone the cylinders, and remeasure the bores.

2. Hone the cylinder bores with honing oil and a fine (400 grit) stone in a 60

degree cross-hatch pattern (A). Use only a rigid hone with 400 grit or finer
stone such as Sunnen, Ammco, or equivalent. Do not use stones that are worn
or broken.

Fig. 107: Identifying Cross-Hatch Pattern
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. When honing is complete, thoroughly clean the engine block of all metal

particles. Wash the cylinder bores with hot soapy water, then dry and oil them

2008 Honda Civic GX

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