D21 Hardbody XE 4WD L4-2389cc 2.4L SOHC MFI (KA24E) (1997)
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Piston Ring: Testing and Inspection
SIDE CLEARANCE
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Side clearance for the top ring is 0.04 - 0.08 mm (0.0016 - 0.0031 inch), 0.03 - 0.07 mm (0.0012 - 0.0028 inch) for the 2nd ring and 0.065 -
0.135 mm (0.0026 - 0.0053 inch) for the oil ring.
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The maximum limit of side clearance for all rings is 0.1 mm (0.004 inch).
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If out of specification, replace piston rings, as necessary.
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If clearance exceeds maximum limit with new ring, replace piston.
END GAP
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Top ring end gap is 0.28 - 0.52 mm (0.0110 - 0.0205 inch), 2nd ring end gap is 0.45 - 0.69 mm (0.0177 - 0.0272 inch) (with R or T punched on
the ring) and 0.55 - 0.70 mm (0.0217- 0.0276 inch) (when an N is punched on the ring). The oil ring gap is 0.20 - 0.69 mm (0.0079 - 0.0272
inch).
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The maximum limit of ring gap is 0.5 mm (0.020 inch).
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If out of specification, replace piston ring. If gap exceeds maximum limit with a new ring, rebore cylinder and use oversized piston and piston
rings.
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When replacing the piston, check cylinder block surface for scratches or seizure. If scratches or seizure are found, hone or replace the cylinder
block.
