Problems

Ive had my timing belt changed a few months ago because of a noise coming from the guard (plastic) the whole unit was changed and it turned out the be an engine mounting screw gone a stray but with in two weeks the noise returned. there was no damage to the belt nor sprockets but still i insised they sort the problem out. That was 2 months ago after 4 trips to the same garage and a lot of money later still no joy . There is still no damage bein cause on the belt because the guard only hits the tensioner. the engine mountings are secure and the noise only happens when the car is moving. :confused:

Any suggestions??

Dan