PISTON RING CLEARANCE INSPECTION [WLT-1, WLT-2, WL-3]
id011097502300
1. Measure the piston ring-to-ring land clearance around the entire circumference.
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• If it exceeds the maximum specification, replace the piston and piston ring.
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Standard piston ring clearance
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Top: 0.06—0.10 mm {0.0024—0.0039 in}
Second: 0.04—0.08 mm {0.0016—0.0031 in}
Oil: 0.03—0.07 mm {0.0012—0.0027 in}
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Maximum piston ring clearance
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0.15 mm {0.0059 in}
2. Insert the piston ring into the cylinder by hand and use the piston to push it to the bottom of the ring travel.
3. Measure each piston ring end gap with a feeler gauge.
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• If it exceeds the maximum specification, replace the piston ring.
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Standard piston ring end gap
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Top: 0.22—0.32 mm {0.0087—0.0125 in}
Second: 0.32—0.47 mm {0.0126—0.0185 in}
Oil: 0.22—0.37 mm {0.0087—0.0145 in}
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Maximum piston ring end gap
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1.0 mm {0.039 in}
