Why Replace Your Timing Belt?

The purpose of a timing belt is to provide a quiet, flexible connection between the camshaft and crankshaft to keep the valves opening and closing in phase with the movement of the pistons.
NOTE: Timing belts are used in two types of engines designated "interference" and "non-interference". If the timing belt breaks on a non-interference design, there is enough clearance between the pistons and valves to prevent damaging contact. An interference design does not have sufficient clearance between those parts and engine damage would result from a broken timing belt. Generally, I recommend replacement at 60,000-mile intervals. Breakage is not the only reason to replace your timing belt. Looseness and wear will allow the timing belt to slip and change valve timing resulting in very poor performance, a no-start condition, or engine damage.