The gear system of your BMW takes care of the movement of the engine valve and pistons, also it is responsible to check whether they are working properly in a well-coordinated and timely manner or not. The gear system simply fends off the pistons and valves from moving frontward towards the camshaft so that during the operation, the camshaft may complete its cycle before being pushed and all this is possible with a perfect timing of a BMW timing belt. BMW timing belts are therefore said to be the cheapest means of power transmission which runs smoothly with a little noise between shafts that may or may not be axially aligned either to transmit power or to track relative movement. These timing belts protect all machines from being overloaded, jammed, noisy and excessively tremored.
BMW timing belts are a positive transfer belt which tracks the relative movement of the aux shaft, crankshaft, and camshaft and also checks their time of movement with each other. If the engine is running smoothly then the firing of ignition will take place as per the scheduled time without any loss in compression and for all this to take place a proper harmonization of the aux shaft, crankshaft, and camshaft is vital. These timing belts are toothed rubber belt that keeps all three shafts in time with one another by the help of high-tensile fibers like fiberglass or Twaron / Kevlar which runs the length of the belt. The armored bands of rubber possessed very low power carrying capacity that is why they are specifically apt for low-power applications like rotation of crankshaft and camshaft of an IC engine. If the work tenure of a BMW timing belt is long then there will be more timing jumps and thus excessive motion. The life expectancy of a BMW timing belt is to lower a hot or leaky engine.
These timing belts are also known as "Toothed belts", or "Notch belts", or "Cog belts", or "Synchronous belts". These timing belts consist of teeth that lattice specifically with its mating sprockets and can easily fit into an identical toothed winch. These timing belts are designed out of different stretch-resistant materials like reinforced rubber bands however teeth are molded from special rubber compound which gives them a good mesh and long life. Such non-metallic construction of the BMW timing belt makes it more flexible, less noisy and cost-effective. Timing belts are used in lieu of Timing Chains or Gears or Sprocket Arrangement as they were much noisier, less efficient, and more expensive than a timing belt; also needed a timely lubrication bath. BMW timing belts can bear a tension upto 200 hp (150 kW) at a speed of 16,000 ft/min.
Symptoms of a faulty BMW timing belt
- Poor driving condition
- Knocking valves
- Power loss
- Rattling noise
- Wretched engine
- Other symptoms like wearied or broke cords, worn-out teeth, missing rubber chunks, deep cracks, cracks on the surface or cracks near the base of the belt teeth etc.