How to reduce the cost of overhauling the engine?
The words "overhauling the engine" for eachmotorists sound like a sentence, hearing which, just right to fall into despair. But is it so terrible? In fact, the overhaul of the engine can be significantly cheaper, especially for expensive cars. The fact is that the engine of any car is, in fact, just iron, and, no matter how difficult it is, they are all very similar.All have pistons, piston rings, crankedshaft. Of course, some have more valves, some have camshafts, cylinders, but they all operate on the principle of four cycles, which makes them almost identical.
The overhaul of the engine is expensive, first of all,details, which, for example, for cars of German production are many times greater than for brands of cars of other producing countries. But do not forget that for the work of a mechanic, you can also shell out a lot.
A major overhaul of the VAZ engine can also be carried out ingarage, enough to stock up with a simple set of tools, among which there should be a gas burner, since the piston pins in the upper heads of the connecting rod are inserted at a temperature of 750-800 degrees.
First of all, we must take into account that overhaulengine implies its complete disassembly, so you need to take care of a clean workplace in a timely manner, it's better to work on a detached engine without attachments. In addition, you need to stock up a solid amount of kerosene, you will need a "bath" for the shafts, as well as for other small things.
If the engine is removed, the work must be divided into three parts: the cylinder head, the block itself, and the lubrication system. And now - in order and in more detail.
First you need to disassemble everything for details, butit is worth remembering that the valve mechanism, which can not be replaced, must be installed in the same order as it stood. Valves, after their replacement and replacement of the guide bushings, must be ground with lapping pastes. The distributing shaft (or shafts, if there are two or more) is worth measuring with a micrometer and, if there are deviations from the norm, replace. Also need to pay attention to their supports, as they are usually made of cast aluminum (a fairly soft material that has less strength).
Now a little bit about the cylinder block. Here the repair is exclusively in replacement. Of course, if you have a machine for boring and honing cylinders, then all the work you can do yourself, but there are very few such people. Therefore, the unit itself should be sent to a specialized workshop where specialists work.
After he returns, he will be insulted on itclass of pistons, which should be selected. For each class of pistons, there is a class of fingers and piston rings. The weight of the set for each cylinder should ideally be identical, but an error of 2 grams is allowed.
Go ahead. Next on the list is the lubrication system.Overhauling the engine involves repairing this system, because it is responsible for the safety and durability of the parts. Here, again, a micrometer is needed to determine if grinding of the crankshaft necks is required. If so, you should do the same as with the block. If not - you just need to replace the liners. Their size is usually indicated when repairing the counterbalances on the cheeks. If the size is not specified, then the cervix has never been ground, then it corresponds to the nominal value.
After all these operations, the assembly is performed, andalso the replacement of consumable fluids and filter elements. Before the test run, it is recommended to fill the oil filter with oil and crank the crankshaft by hand. From all the above it follows that the overhaul of the engine with your own hands - it's not so scary, because nowadays it is easy to find any manual for operation.