timing belts

The timing belt controls the precise combustion process in the engine: It drives the camshaft which in turn controls the valves. Its function is particularly important because, if the camshaft and the crankshaft do not run synchronously, the engine will not work. In the worst-case scenario the valves and pistons can collide at full speed with each other in the engine. This results in engine failure!

The timing belt often also takes on additional tasks such as driving the fuel injection pump, the water pump or the balancer shaft.

BURG GERMANY® timing belts consist essentially of:

A) Polyamide fabric, sometimes also on the belt backing

B + D) Synthetic rubber e.g. HNBR or ACSM, sometimes fiber-reinforced
C) Tension member glass-fiber reinforced



Timing belts must not be creased since this will cause the glass-fiber tension members to break inside the belt. The belt’s load-carrying capacity is then no longer assured and it can tear. Consequence: Engine failure.

Replacement interval:

Timing belts are subject to aging and wear. They therefore have to be regularly checked and replaced. The checking and replacement intervals are always specified by the vehicle manufacturer and must be complied with.

Timing belts are maintenance-free, i.e. they do not  require retensioning. They endure high levels of stress as a result of the high temperatures in the engine com-partment and the constant flexing and are subject to aging and constant wear. Their condition should be in-spected as a precautionary measure during servicing in accordance with the vehicle manufacturer’s specifica-tions. Irregularities are then identified in good time. If the timing belt snaps while the engine is running, the engine valves and pistons can suffer high-impact colli-sions. In many cases this causes serious engine dam-age. To avoid that, a belt should be changed under the following circumstances:

  1. The maximum lifetime has been reached
  2. The belt is damaged/worn

For the timing belt to operate safely and reliably, various components are required to guide it and ensure the correct tension. All the belt drive components are subjected to extreme stresses in modern engines, such as vibrations or large fluctuations in speed and temperature. They affect the entire timing system and call for exacting quality standards. In case of damaged belts please find notes below of cause and related solutions :