Honda Civic. Manual — part 586

remove it with a ridge reamer (A). Follow the reamer manufacturer's
instructions. If the ridge is not removed, it may damage the pistons as they are
pushed out.

Fig. 99: Identifying Hard Carbon Around Top Of Each Cylinder
Courtesy of AMERICAN HONDA MOTOR CO., INC.

15. Use the wooden handle of a hammer (A) to drive out the piston/connecting rod

assembly (B).

Fig. 100: Driving Out Piston/Connecting Rod Assembly
Courtesy of AMERICAN HONDA MOTOR CO., INC.

16. Reinstall the lower block and bearings on the engine in the proper order.
17. Reinstall the connecting rod bearings and caps after removing each

piston/connecting rod assembly.

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

2008 Honda Civic GX

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

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 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. 101: Identifying Crankshaft Journal Out-Of-Round
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 engine block.
9. Measure runout on all 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

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

Service Limit: 0.04 mm (0.0016 in.)

2008 Honda Civic GX

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

Fig. 102: Measuring Runout On 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 11 mm (0.4 in.) from the bottom of the

skirt. There are two standard-size pistons (No Letter or A, and B). The letter is
stamped on the top of the piston. Letters are also stamped on the block as
cylinder bore sizes.

Piston Diameter

Standard (New):

No Letter (or A): B: 85.980-85.990 mm (3.3850-3.3854 in.)

B: 85.970-85.980 mm (3.3846-3.3850 in.)

Service Limit:

No Letter (or A): 85.930 mm (3.3831 in.) 85.920 mm (3.3827 in.)

Oversize Piston Diameter

2008 Honda Civic GX

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