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5. Inspection of piston ring end gap
(1) Apply engine oil to the cylinder walls.
(2) Insert the piston rings into the cylinder bore.
(3) Using a piston, push down the piston ring to a point
110 mm from the cylinder block upper surface.
(4) Measure the piston ring end gap, using a thickness
gauge or a feeler gauge.
Piston ring end gap
Compression ring No. 1
Compression ring No. 2
Oil ring
Oil ring spacer shape
Shape A
If the piston ring end gap exceeds the allowable limit, a set of piston rings for that engine should be re-
placed.
With "T" mark
With "N" mark
Shape of spacer A
Shape of spacer B
Specified value mm
0.27 - 0.37
0.27 - 0.40
0.4 - 0.55
0.2 -
0.60
0.15 -
0.60
Shape B
EM–83
Piston ring
JEM00347-00316
JEM00348-00317
Allowable limit mm
0.7
0.8
1.0
JEM00349-00318
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