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What causes a small ticking sound to come from inside the engine block?
Zachreniger
To someone who is in-experienced, the sound may seem to come from within the engine "block" but may be coming from any part of the engine. A few things can cause this, and only an experienced mechanic can tell them apart by the way they sound. The possibilties are a loose connecting rod because of a worn rod bearing where it connects to the crankshaft, a loose wrist pin (connects the connecting rod to the piston), A poorly adjusted valve or rocker arm, and some engines (chevy small block for example) use a push rod between the fuel pump and the camshaft which can make a tapping noise if the return spring in the fuel pump is weak. If the rod bearing or wristpin are the cause, you are in for an engine rebuild. The valves can be re-adjusted, and the fuel pump can be replaced. Carl King http://www.classiccarauto.com
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∙ 18y ago
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