ive got a knocing sound, coming fron the pass side of the engine, but it sounds like plastic, but it doesnt sound like a connecting rod or bearing, or any thing like that(ive had the expierence in other cars, with v8s, but never in any thing like this). im lost, and dont want to take everything apart just to find out i was wrong, so i was wondering if any one has ever herd of a timing belt tensioner going out, and what does that sound like