Engine: timing belt and spark plugs

The timing belt transfers the force to the camshaft via the crankshaft. This causes the engine valves to open and close. The fuel-air-mixture enters the combustion chamber, burns and drives the pistons. The timing belt often drives the water pump, too. 

An old or very worn timing belt may tear and cause engine damage. The reason: The engine valve control is driven out of sync, the piston strikes the valve like a bullet – often at 15 m/s. In many cases, the entire cylinder head has to be replaced.

After 4 years or 60,000 km (whichever occurs first) we visually inspect your timing belt for any wear. If necessary and after consultation with you we replace the timing belt and the associated tensioner. We reassemble the engine and test drive your car for optimal performance.

An incorrectly assembled toothed belt can destroy the engine. What’s more, it’s quite difficult to change. Alongside a lot of specialist knowledge, you also need specific tools. It’s a better idea to have your Volkswagen Partner change it for you.

Depending on the type and the quality, spark plugs last for 30,000km. Stick to your service interval schedule, this way you’ll know as soon as your spark plugs are no longer in good working order. And you’ll avoid any subsequent costs.

You can extend your spark plugs’ service life by maintaining the right oil level and with the correct driving style. If the oil level is too high, they become oily; If you drive a lot of short distances, they become sooty. The reason: The engine doesn’t reach the temperature that the spark plugs need to clean themselves. 

Spark plugs are exposed to high pressure, vibrations and temperatures of up to 3,000 °C. Even just a few spark failures can damage the catalytic converter.

Even if it looks easy to change: The smallest mistake can lead to considerable engine damage. But why? Every engine needs a different spark plug. The wrong one will damage the engine as much as the wrong tool or the wrong torque applied during assembly. Don’t take the risk.