In a large, low－speed diesel engine the clearance between the piston crown and cylinder he

In a large, low-speed diesel engine the clearance between the piston crown and cylinder head is found to be excessiveIn order to correct for this, you should_________.

A.build up the piston crown by metal spraying

B.build up the cylinder head by metal spraying

C.insert shims between the crankpin bearing box and the connecting rod foot

D.install a thinner head gasket

请帮忙给出正确答案和分析，谢谢！

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