2012 Chevy sonic timing belt noise.

  1. Any other symptom? Not sure what market you are in, in the U.S. i believe most if not all have timing chain. Its a metal chain. What might have happened is your drive belt tore off (rubber degrades because of oil) or a pulley is seized and it tore the belt. Timing issues usually have check engine lights accompany it along with rough idle or poor running engine. Drive belts usually have overheating or poor charging (car turns off) due to drive belt not rotating alternator and water pump.

  2. No rough idel, still drives ok. I’m in the USA.. no check engine light. No overheating. It has 158k on the car. It smokes from the top portion of the timing belt cover.

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