How do I repair the cylinder head?

The cylinder head is one of the most important components in the design of an automobile engine. The importance of this detail is emphasized by the fact that the cylinder head suffers to half of all the engine loads. Accordingly, the block suffers enormous loads. Therefore, every self-respecting driver should regularly diagnose this mechanism for cracks and deformations. As a rule, the repair of the cylinder head is required by the car with a run of 250-500 thousand kilometers. This mileage almost completely coincides with the frequency of the engine overhaul, so the cylinder head is often repaired with it.

Why does the cylinder head fail before the deadline?

This happens only in rare cases and only when the motor boils. Few people know, but even after the first boil the head of the block can become covered with cracks, and if you pour it with water to cool it, it is completely deformed. That's why it's so undesirable to bring the ICE to a boil.

Repair of cylinder head

Whatever it was, but the cylinder head is restored in both cases equally, and all work is done in a similar way. As a rule, to repair the heads of the cylinder block takes from 2 to 5 days of free time. Of course, you can meet in 1 day, but for this you need to have special skills and knowledge. By the way, the entire technology requires high accuracy, so grinding and surface milling must be done on special machines.

Repair of the cylinder head can be divided into several stages. At the first, the cracks are filled (of course, before that, the cylinder head is removed from the engine). Next, the guide bushings are repaired. If their condition is critical, they must be completely replaced. In the first case, with the help of special equipment, the radius of the hole for the valve stem is reduced. In this case, a step-by-step rolling out of the device with a carbide roller and processing with a reamer (in order to restore its cylindricality). In the second case, a new set of bushings is purchased and, when heated, is installed in place of the old ones. Then, the head surface is leveled. This is done only in cases where its surface has been deformed, for example, after overheating. After that, the valves or their saddles are replaced or restored. At the final stage, the camshaft and pushers change, after which chips and various deposits are removed from the channels of the cooling and lubrication system.

Repair of a head of the block of cylinders: the price

It is worth noting that the equipment for the recovery of cylinder head is several times more expensive than the car itself, so in the event of a breakdown of the unit, motorists turn to SRTs engaged in engine overhauls. The cost of repairing the cylinder head is small. If it is a domestic car, this service will be rendered for 3-6 thousand rubles. Repair GBC imported car, for example, the French "Peugeot" will cost you 15-16 thousand rubles.