If a timing belt is not changed as recommended by the manufacturer, it can eventually break or slip. This can cause serious damage to the engine, as the timing belt is responsible for synchronizing the movement of the engine’s valves and pistons. If the timing belt breaks or slips, the valves and pistons may collide, causing bent valves, damaged pistons, and other engine damage. In some cases, a broken timing belt can also cause the engine to stall or not start at all. It is important to change the timing belt as recommended to avoid costly repairs.

Why do timing belts fail

Age and Wear: Timing belts are made of rubber and are subject to wear and tear over time. As the belt ages, it can become brittle and lose its elasticity. This can cause the belt to stretch, crack, or break. Additionally, the tensioner and idler pulleys that keep the belt tight can also wear out, causing the belt to slip or jump.

Overheating: High temperatures can cause the rubber in the timing belt to expand and contract, leading to cracking or breaking. Additionally, if the belt is not properly tensioned, it can start to slip, which can generate heat that can damage the belt.

Oil Contamination: Timing belts can also be damaged by oil leaks. If oil gets on the belt, it can cause the belt to become slippery and lose traction. Additionally, oil can cause the rubber in the belt to swell, leading to cracking or breaking.

Misalignment: If the timing belt is not properly aligned, it can cause the belt to rub against other engine components, leading to wear and tear. Additionally, if the belt is not properly tensioned, it can cause the belt to slip or jump, leading to damage.

Poor Maintenance: Neglecting regular maintenance, such as inspections and replacements, can lead to timing belt failure. It is important to follow the manufacturer’s recommended schedule for timing belt replacement to avoid costly repairs.

It is important to address these issues as soon as possible, to avoid costly repairs, and potential damage to the engine.

Symptoms of a failing timing belt

• Noise coming from the front of the engine
• Squealing or chirping noise when the engine is running
• The engine not starting or running
• Misaligned or loose belt
• Visible cracks or fraying on the belt

In summary, timing belts are an essential component of an engine and their failure can cause serious damage. Regular maintenance and replacement of timing belts as recommended by the manufacturer can help to avoid costly repairs and damage to the engine. If you notice any symptoms of a failing timing belt, have it inspected by a professional as soon as possible.