* Timing Belt Function: The timing belt synchronizes the rotation of the crankshaft (which drives the pistons) and the camshaft (which controls the valves).
* Valve Interference: In most V6 Toyota Highlanders, the valves and pistons are designed to be extremely close to each other.
* Collision: When the timing belt breaks, the camshaft stops, but the crankshaft continues turning. This can cause the pistons to collide with the open valves, bending or breaking them.
* Severe Damage: The damage from this collision can be extensive, including:
* Bent or broken valves
* Damaged pistons
* Scratched cylinder walls
* Damaged head gasket
In short, a broken timing belt on a 2003 V6 Toyota Highlander is a major mechanical failure that will likely require a costly engine rebuild or replacement.
It's crucial to follow the manufacturer's recommended timing belt replacement schedule to prevent this issue.
