Honda Civic. Manual — part 573

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

Fig. 29: Identifying Wear And Taper At Three Levels Inside 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

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

Service Limit: 0.10 mm (0.004 in.)

2008 Honda Civic GX

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

Fig. 30: 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 engine block for excessive wear.

Piston-to-Cylinder Bore Clearance

Standard (New): 0.010-0.035 mm (0.0004-0.0014 in.)

Service Limit: 0.05 mm (0.002 in.)

2008 Honda Civic GX

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

Fig. 31: Identifying Calculate 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. Remove and replace the oil jets (see OIL JET REPLACEMENT ).
3. Hone the cylinder bores with honing oil and a fine (400 grit) stone.

Honing Pattern: Within 30-60 degree cross-hatch pattern (A)

Fig. 32: Identifying Honing Pattern

NOTE:

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.

2008 Honda Civic GX

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

Courtesy of AMERICAN HONDA MOTOR CO., INC.

4. 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
immediately to prevent rusting. Never use solvent, it will only redistribute the
grit on the cylinder walls.

5. 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.

6. Install the new oil jets (see OIL JET REPLACEMENT ).

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. 33: 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

NOTE:

Take care not to damage the ring grooves.

2008 Honda Civic GX

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