Honda Civic. Manual — part 572

21. Reinstall the connecting rod bearings and caps after removing each

piston/connecting rod assembly.

22. Mark each piston/connecting rod assembly with its cylinder number to make

sure they are reused in the original order.

CRANKSHAFT INSPECTION

Out-of-Round and Taper

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

PISTON REMOVAL ).

2. Clean the crankshaft oil passages with pipe cleaners or a suitable brush.
3. Clean the keyway and the threads.
4. Measure the out-of-round at the middle of each rod and main journal in two

places. The difference between measurements on each journal must not be
more than the service limit.

Journal Out-of-Round

Standard (New): 0.005 mm (0.0002 in.) max.

Service Limit: 0.010 mm (0.0004 in.)

NOTE:

The existing number on the connecting rod does not
indicate its position in the engine, it indicates the rod
bore size.

2008 Honda Civic GX

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

Fig. 26: Identifying Crankshaft
Courtesy of AMERICAN HONDA MOTOR CO., INC.

5. Measure the taper at the edges of each rod and main journal. The difference

between measurements on each journal must not be more than the service limit.

Journal Taper

Standard (New): 0.005 mm (0.0002 in.) max.

Service Limit: 0.010 mm (0.0004 in.)

Straightness

6. Place the engine block on the surface plate.
7. Clean and install the bearings on the No. 1 and No. 5 journals of the engine

block.

8. Lower the crankshaft into the block.
9. Measure the runout on all of the main journals. Rotate the crankshaft two

complete revolutions. The difference between measurements on each journal
must not be more than the service limit.

Crankshaft Total Runout

2008 Honda Civic GX

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

Standard (New): 0.03 mm (0.0012 in.) max.

Service Limit: 0.04 mm (0.0016 in.)

Fig. 27: Measuring Runout On Of Main Journals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

BLOCK AND PISTON INSPECTION

1. Remove the crankshaft and pistons (see CRANKSHAFT AND PISTON

REMOVAL ).

2. Check the piston for distortion or cracks.
3. Measure the piston diameter at a point 14 mm (0.55 in.) from the bottom of the

skirt.

Piston Diameter

Standard (New): 80.980-80.990 mm (3.1881-3.1886 in.)

Service Limit: 80.93 mm (3.186 in.)

Oversize Piston Diameter

0.25: 81.230-81.240 mm (3.1980-3.1984 in.)

2008 Honda Civic GX

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

Fig. 28: Measuring Piston Diameter Point From Bottom Of Skirt
Courtesy of AMERICAN HONDA MOTOR CO., INC.

4. Measure the wear and taper Y at three levels inside 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): 81.000-81.015 mm (3.1890-3.1896 in.)

Service Limit: 81.070 mm (3.1917 in.)

Oversize Bore

0.25: 81.250-81.265 mm (3.1988-3.1994 in.)

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

Bore Taper

2008 Honda Civic GX

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