February 19, 2022, 09:31 | Cars
50% of cars are at risk.
Many modern automobile engines use a compact and quiet toothed rubber-reinforced timing belt to drive camshafts. Its breakage can lead to the breakage of the cylinder head, damage to the pistons and bent connecting rods. In the worst case, after the timing belt breaks, the engine will need to be overhauled, Ukr.Media informs.
Experts named six reasons why the timing belt can break. A dangerous breakdown can be prevented if the engine is repaired in time and you don't skimp on spare parts.
Natural wear of the timing belt
The timing belt must be changed regularly. The service life of the part depends on the model of the car and even on the same engines it can differ several times. Experts advise to carry out the first and second replacement according to the regulations, and then to change the timing belt a little more often than the manufacturer advises. On an old car, pulleys wear out and belt covers dry out, which increases the wear of the part.
Even if the car is driven little, the timing belt needs to be replaced from time to time. Experts recommend installing a new part even when buying a car with mileage.
The drive belt can be damaged from working jammed rollers. High-strength threads that separate from the belt easily get stuck between the drive gear and the timing belt. After that, the part usually breaks, experts warn.
The malfunction can be detected independently. To do this, you need to listen to how the motor works in the area of the belt drive when you press the gas pedal. Howling noises indicate a problem with the drive that requires repair. Regular replacement of the drive belt, its rollers and timing belt rollers will help prevent breakdown.
Poor quality spare parts
Experts advise when replacing parts that rotate together with the timing belt, use only original parts or proven analogues. They recommend to be especially careful when choosing the belts themselves. Cheap analogues can quickly fail.
Installing the timing belt and drive belt is a complicated procedure. Improperly tensioned belts quickly break or fly off. A tension error can be indicated by a strong howling of the belt when the crankshaft revolutions increase.
If the timing belt covers are installed incorrectly, the protection may damage the part. If the casing is not installed at all when repairing the engine, the belt will quickly fail due to the debris that gets into it.
Ingress of technical fluids
Experts advise to immediately eliminate traces of lubricant or antifreeze in the area of the timing drive. Technical fluids destroy the belt. They can leak from leaky stuffing boxes. Sometimes the timing belt turns out to be filled with grease when replaced carelessly.
As long as the engine can be started without heating, the timing belt is working does not suffer from frost. But in extreme cold, an attempt to start a frozen car from a tow truck can lead to an immediate break in the belt.