In a large low-speed diesel engine,...

Question 1 / 270705eccefa1bacbc34ba4d475ab

Question 1 of 270705eccefa1bacbc34ba4d475ab

In a large low-speed diesel engine, excessive piston clearance from the cylinder head can be restored by __________.

Question 1 of 27070

In a large low-speed diesel engine, excessive piston clearance from the cylinder head can be restored by __________.

🔍 Key Concepts

• Piston clearance / compression height in large low‑speed diesels • How connecting rod length and crank throw geometry affect piston position at TDC (top dead center) • What changing gasket thickness vs. bearing/shim thickness actually moves in the engine

💭 Think About

• Which component change will physically move the piston closer to or farther from the cylinder head when the crank is at TDC? • Does changing the cylinder head gasket thickness move the head, the piston, or both relative to the crankshaft centerline? • What effect does inserting shims at the crankpin bearing/connecting rod joint have on the effective length of the rod and thus on piston travel?

✅ Before You Answer

• Be clear on what “piston clearance from the cylinder head” means and when it is measured (TDC). • Identify which choices alter the effective connecting rod length versus which only affect bearing fit or gasket sealing. • Verify in your mind which actions are standard maintenance practices on large low‑speed marine diesels, and which sound mechanically incorrect or unsafe.

Question 1 of 27070

In a large low-speed diesel engine, excessive piston clearance from the cylinder head can be restored by __________.

decreasing the thickness of the cylinder head gasket

inserting shims between the crankpin bearing box and the connecting rod foot

replacing the complete bearing set

rotating the crankpin bearing until the proper end clearance is obtained

Question 1 / 270705eccefa1bacbc34ba4d475ab

Question 1 of 270705eccefa1bacbc34ba4d475ab

In a large low-speed diesel engine, excessive piston clearance from the cylinder head can be restored by __________.

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Question 1 of 27070

In a large low-speed diesel engine, excessive piston clearance from the cylinder head can be restored by __________.