This procedure is intended to give information on inspecting piston ring grove. Refer to the Specifications Manual for specifications for this procedure.
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- Check the piston for wear and other damage.
- Check that the piston rings are free to move in the grooves and that the rings are not broken.
- Remove the piston rings and clean the grooves and the piston rings.
- Fit new piston rings (2) in the piston grooves (3) .
(1) Feeler gauge
(2) Piston ring
(3) Piston grooves
- Check the clearance for the piston ring by placing the 8H-8581 Feeler Gauge (1) between piston groove (3) and the top of piston ring (2) . Refer to Specifications, "Piston and Rings" for the dimensions.
Note: Some pistons have a tapered top groove and the piston ring is wedged. The clearance for the top piston ring cannot be checked by the above method when this occurs.
- Clean all carbon from the top of the cylinder bores.
(1) Piston ring
(2) Cylinder ring ridge
(3) Feeler gauge
- Place each piston ring (1) in the cylinder bore just below the cylinder ring ridge (2) .
- Use the 8H-8581 Feeler Gauge (3) to measure piston ring end gap. Refer to Specifications, "Piston and Rings" for the dimensions.
Note: The coil spring must be removed from the oil control ring before the gap of the oil control ring is measured.