单选题If clearance between a piston and the cylinder wall is excessive, piston slap will occurThe slap itself is caused by （）Aalternation of side thrustBa breakdown of the lube oil film on the cylinder wallCworn piston boss piston pin bearingsDfluctuating gas pressure in the combustion space
单选题
If clearance between a piston and the cylinder wall is excessive, piston slap will occurThe slap itself is caused by （）
A
alternation of side thrust
B
a breakdown of the lube oil film on the cylinder wall
C
worn piston boss piston pin bearings
D
fluctuating gas pressure in the combustion space
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