Fit L4-1.5L (2008)
Piston Ring: Service and Repair
Piston Ring Replacement
1. Remove the piston from the engine block.
2. Using a ring expander (A), remove the old piston rings (B).
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 the
blade, if necessary. The top ring grooves are 1.0 mm (0.04 in.) wide, the second ring groove is 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 tool.
NOTE: If the piston is to be separated from the connecting rod, do not install new rings yet.
4. Using a piston, push anew ring (A) into the cylinder bore 15-20 mm (0.6-0.8 in.) from the bottom.
5. Measure the piston ring end-gap (B) with a feeler gauge:
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If the gap is too small, check to see if you have the proper rings for your engine.
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If the gap is too large, recheck the cylinder bore diameter against the wear limits. If the bore is over the service limit, the engine block must be
rebored.
Piston Ring End-Gap
Top Ring:
Standard (New): 0.15-0.30 mm (0.006-0.012 in.)
Service Limit: 0.60 mm (0.024 in.)
Second Ring:
Standard (New): 0.35-0.50 mm (0.014-0.020 in.)
Service Limit: 0.65 mm (0.026 in.)
Oil Ring:
Standard (New): 0.20-0.70 mm (0.008-0.028 in.)
