Honda Civic. Manual — part 566

2006-08 ENGINE

Engine Block - Civic GX

COMPONENT LOCATION INDEX

Fig. 1: Identifying Engine Block Component (1 Of 2)

NOTE:

Refer to the ENGINE BLOCK (EXCEPT HYBRID) article for
items not shown in this section.

2008 Honda Civic GX

2006-08 ENGINE Engine Block - Civic GX

2008 Honda Civic GX

2006-08 ENGINE Engine Block - Civic GX

Fig. 2: Identifying Engine Block Component (2 Of 2)

PISTON RING REPLACEMENT

1. Remove the piston from the engine block, refer to the CRANKSHAFT AND

PISTON REMOVAL .

2. Using a ring expander (A), remove the old piston rings (B).

2008 Honda Civic GX

2006-08 ENGINE Engine Block - Civic GX

Fig. 3: Removing Piston Rings

3. Clean all the ring grooves thoroughly with a squared-off broken ring, or a ring

groove cleaner with a blade to fit the piston grooves. File down a blade if
necessary. The top ring and second ring grooves are 1.2 mm (0.05 in.) wide,
and the oil ring groove is 2.0 mm (0.08 in.) wide. Do not use a wire brush to
clean the ring grooves, or cut the ring grooves deeper with the cleaning tools.

4. Using a piston, push a new ring (A) into the cylinder bore 15-20 mm (0.6-0.8

in.) from the bottom.

Fig. 4: Pushing Piston Rings

NOTE:

If the piston is to be separated from the connecting rod,
do not install new rings yet.

2008 Honda Civic GX

2006-08 ENGINE Engine Block - Civic GX

5. Measure the piston ring end-gap (B) with a feeler gauge:

If the gap is too small, check to see if you have the proper rings for your
engine.

If the gap is too large, recheck the cylinder bore diameter against the wear
limits, refer to the BLOCK AND PISTON INSPECTION . If the bore is
beyond the service limit, the engine block must be rebored.

Piston Ring End-Gap

Top Ring:

Standard (New): 0.20-0.35 mm (0.008-0.014 in.)

Service Limit: 0.60 mm (0.024 in.)

Second Ring:

Standard (New): 0.40-0.55 mm (0.016-0.022 in.)

Service Limit: 0.70 mm (0.028 in.)

Oil Ring:

Standard (New): 0.20-0.50 mm (0.008-0.020 in.)

Service Limit: 0.70 mm (0.028 in.)

6. Install the rings as shown. The top ring (A) has a 1R mark, and the second ring

(B) has a 2A or 2R mark. The manufacturing marks (C) must be facing
upward.

2008 Honda Civic GX

2006-08 ENGINE Engine Block - Civic GX