Question about Volvo S40

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2003 Volvo S40 making a tap. tap, tap, silent (repeated continually) while the engine is running. Noise appears to be coming from the top of the engine. Engine has been recently preplaced but the tap continues. Any ideas?

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  • Volvo Master
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Please check to see if the slapping noise is from the belts, the idler , the water pump or alternator. Also check if this is the tappets or the valves, if so this might require a check up after removing the valve door covers. Check for oil pump pressure and also for settings of the valves.

Posted on Mar 18, 2011

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