Volvo Penta D65A MS Workshop Manual page 100

Group 21 Engine Body
100
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Piston Rings
Measuring piston ring gaps
Place the rings in the new or master cylinder liner.
Measure the gap of each ring. If the service limit is
exceeded, replace all the rings on that piston.
NOTE! Use a piston to place the piston ring in the lin-
er by pushing it squarely.
Piston ring gap, Top ring, mm [in]
Standard clearance ... 0.6–0.8 [0.024–0.031]
Service limit .............. 2.0 [0.079]
Piston ring gap, Second ring, mm [in]
Standard clearance ... 0.6–0.8 [0.024–0.031]
Service limit .............. 2.0
Piston ring gap, Oil ring, mm [in]
Standard clearance ... 0.3–0.45 [0.012 –0.018]
Service limit .............. 2.0
[0.079]
[0.079]