there is a knock in her engine at idle speed on 1999 Volkswagen Beetle

when my girlfriend starts her car there is a knock in her engine that sounds like it is coming from the right side of engine (where serp. belt is) timing belt was just changed about 3 or 4 thousand miles ago. when she turns it off it sounds like metal scraping. iwas wandering if it might be bad crank or cam bearings she thinks its just bad gas.

1 answer 1 comment
COULD BE A BAD TIMING BELT TENSIONER, OR DRIVE BELT TENSIONER..
thanks for your answer i will check that out this weakend