Q: There is an awful clunking rattling noise when the engine is running.

asked by on December 20, 2016

The sound is like metal clunking for no reason after I restated my car to go back out

My car has 34000 miles.
My car has a manual transmission.

Hi there. There could be either the engine is having a bearing slap on the rod bearings with too much wear causing the noise or an accessory on the engine is locking up making the belt tensioner pop back and forth. I recommend removing the serpentine or drive belt(s) to the engine and start the engine back up. If the noise is still there, then it may be a bearing issue inside the engine. I recommend seeking out a professional, such as one from Your Mechanic, to help you diagnose the sound you are hearing.

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