What moves the timing belt?
What moves the timing belt? There are sprockets at the end of the crankshaft and camshaft, and the timing chain or belt is attached to them. As the crankshaft turns, the belt/chain turns the camshaft at precisely the right speed. What happens when a timing belt goes slack? Basic Failure. Timing belt failure comes in three flavors: stretching, worn teeth and snapping, generally in that order. All timing belts stretch, and most of that stretch occurs about 15 minutes after installation. A spring-loaded tensioner keeps the belt tight, but after a while the tensioner will run out of travel and...