If clearance between a piston and the...

Question 1 / 270705eccefa1bacbc34ba4d4751f

Question 1 of 270705eccefa1bacbc34ba4d4751f

If clearance between a piston and the cylinder wall is excessive, piston slap will occur. The slap itself is caused by __________.

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Question 1 of 27070

If clearance between a piston and the cylinder wall is excessive, piston slap will occur. The slap itself is caused by __________.

🔍 Key Concepts

• piston motion at the top and bottom of the stroke in a worn cylinder • how side thrust from the connecting rod acts on the piston skirt • difference between root cause (mechanical geometry) vs. secondary effects (lubrication, wear, pressure changes)

💭 Think About

• When clearance is excessive, what happens to the piston’s alignment as it changes direction at top dead center and bottom dead center? • Which choice directly describes how the piston physically hits or rocks against the cylinder wall, rather than a condition that might only lead to wear or noise indirectly? • How does the angle of the connecting rod relative to the crankshaft create a side force on the piston during each half of the stroke?

✅ Before You Answer

• Identify which option deals with reversing side forces on the piston due to connecting rod angle. • Eliminate answers that mainly describe lubrication failure or bearing wear rather than the immediate mechanical action that creates the “slap” noise. • Ask: which option best describes the rocking or tilting motion of the piston in an oversized cylinder rather than a general engine problem?

Question 1 of 27070

If clearance between a piston and the cylinder wall is excessive, piston slap will occur. The slap itself is caused by __________.

alternation of side thrust

a breakdown of the lube oil film on the cylinder wall

worn piston boss piston pin bearings

fluctuating gas pressure in the combustion space

Question 1 / 270705eccefa1bacbc34ba4d4751f

Question 1 of 270705eccefa1bacbc34ba4d4751f

If clearance between a piston and the cylinder wall is excessive, piston slap will occur. The slap itself is caused by __________.

Back

Question 1 of 27070

If clearance between a piston and the cylinder wall is excessive, piston slap will occur. The slap itself is caused by __________.