* Timing: The timing belt synchronizes the movement of the crankshaft (which rotates the pistons) and the camshaft (which controls the valves). When the belt breaks, the camshaft and crankshaft are no longer synchronized.
* Valve Interference: Many 1.6 Astra engines are "interference" engines. This means that the valves and pistons can collide if the timing is off. When the timing belt snaps, the valves can be forced open at the wrong time, causing the pistons to strike them.
* Damage: Valve-piston contact can bend or break valves, damage the pistons, cylinder head, and potentially even the crankshaft.
Consequences:
* Major Engine Repair: This is a serious issue that requires extensive and expensive repairs.
* Engine Replacement: In severe cases, the engine might be beyond repair and need to be replaced entirely.
Preventing Timing Belt Failure:
* Regular Maintenance: Follow the recommended service schedule for your car. This includes replacing the timing belt at the specified intervals.
* Visual Inspection: Have your mechanic visually inspect the timing belt for wear and tear during regular maintenance.
Note: The specific risk of engine damage depends on the exact engine model and year of your Astra. If you suspect a timing belt issue, it's crucial to have your car diagnosed by a qualified mechanic immediately.
