Timing belt breakage. What could be worse for a motorist? Is that the subsequent repair of the cylinder head. But some engines use pistons with valve recesses. And for this reason, a broken timing belt is not terrible for the motor.
The gas distribution mechanism is the heart of a modern engine. The accuracy of opening and closing the engine valves depends on it. On the classics, for example, a metal chain was used to drive the camshaft, which is responsible for the operation of the valves. Very reliable but very noisy. Therefore, today a flexible toothed belt is used instead.
Its reliability is also high, but you need to monitor such a parameter as tension. If it is excessive, the belt may not support the load and break. And this is fraught with consequences, sometimes not very pleasant.
Classics and the first Samaras
So, on the classics, engines with a chain drive were installed. But there is a VAZ 2105 engine, in which the chain is replaced with a belt. This is the first timing belt motor to be installed on a classic. It works quieter, comfort is better, and if the belt breaks, the valves do not bend, since the designers have provided everything and made recesses for the valves in the pistons. If the belt drive breaks, the valves do not cling to the pistons, everything ends well.
But the 2105 engine was forgotten and received a bad reputation, as careless craftsmen, making repairs, put pistons without grooves. And the next break in the belt ended with the repair of the cylinder head. The classics were replaced by eights and nines, on which engines with a volume of 1, 1 l, 1, 3 l, 1.5 l were installed. All these engines are 8-valve, a timing belt break without consequences for the cylinder head costs only on an engine with a volume of 1.5 liters.
Tenth family and new models
When engines of 1.5 liters with 16 valves began to be installed on the tenth family, there was a risk that the valves could bend when the timing belt breaks. This could be due to the fact that there are no notches on the pistons. But the 16-valve engine with a volume of 1.6 liters has valve recesses on the pistons. And the valves on it do not bend if the belt suddenly breaks. And you just need to put on a new belt and calmly continue driving.
As for the Priora and Kalina, the first valves on the engine 1, 6 bend, but it is very difficult to break the belt. In width, it is almost twice as wide as the belt on the VAZ 2112 engine. Consequently, its resource is also higher. And for a Kalina with a 1.4 liter engine, if the timing belt breaks, it is likely that the cylinder head will have to be repaired.
So, the conclusion is clear that with severe wear of the belt or its factory marriage, a break is possible. And it is fraught with expensive cylinder head repairs. The way out is to prevent the belt from breaking. And more specifically, you only need to change consumables on time, do not delay until the last. Repairing a cylinder head will cost ten times more than a belt and rollers.
