Quote:
Originally Posted by socalr53
Thanks for the suggestion! Will try that if nothing else makes sense. I forgot to mention that it doesn't happen on cold start, but only when the engine reaches normal operating temperature, which lead me to replace the thermostat. I thought it comes on when the thermostat opens up and the coolant start to circulate.
If it is the belt tensioner, it should start the rattling on cold start also correct ?
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Not necessarily, the bearings inside the tensioner could start talking once it warms up.