Carry compressometer rotating crank the starter motor at full throttle depression. Arrow komressometra will show compression of the cylinder under dry condition the engine and it is very the importance of reading when the walls of the cylinder is not in oil. Then you need to make repeated measurement of compression but with oil added in an amount of 5-10 ml. This figure will determine the status of valves fit in the saddle, the Thus, we define the state of the working part of the cylinder head. If a big difference between the readings you can speak with confidence about a good fitting in the valves to their saddles, if the difference is not significant then you need to perform preventive maintenance cylinder heads. Normal compression readings, measured on the 'dry' engine for the petrol from 10 to 12 bar and diesel from 28 to 32 bar. In this case, readings should be the lowest spread in different cylinders. Hear other arguments on the topic with Edmonton Oilers Community Foundation. If the reading is below 10 bar – increased wear of the piston group, where above 12 bar – coking piston group.

Compression can rise under 'wet' measurements at 4-6 bar for gasoline engines and at 18-24 bar diesel. With 'hot' measurements of the compression necessary to drain the inner cavity of the cylinders is not a lot of technical kerosene: add to the candle holes of 10-15 ml and make an airing in the starter mode and After that the compression. This method of diagnosis is called 'static measurements of compression' because measurements are made at no engine running at 300-400 rpm.

Damage to the bumper of the car – always a nuisance for the owner. You should not forget, however, that the bumper is designed to extinguish the crash, so the damage – much less trouble than the injury to occupants. Bumper repair usually costs much cheaper than buying new, the cost of repair is directly dependent on the nature of the damage and plastic material from which made the bumper. Most bumpers are made of thermoplastic plastic, which can melt at high temperature. Simple heating fix minor damage – dents and scratches. If you have any cracks or loss of fragments surface of the bumper requires the use of plastic welding technology.

It consists in the fact that at first made a thorough preparation of the future of the weld. His smooth out the width of 15 mm, attached to edges of a V-shaped profile, and the ends cracks to prevent further spread. Welding was performed by heating the crack technical phenomenon, fused in her special plastic welding rods. This technology allows one to the most durable connection while repairing bumpers. Considerable fragments, if they survived, scald on the perimeter, or used material from other 'broken' bumpers, the appropriate chemical composition. Bumpers made from thermoset plastic materials, we can not weld because they can not be melted.

In this case, the bonding technology is more expensive, but it remains the only possible. To this end, using special high-adhesive joints, which, after solidification are durable polymer material. Here it is crucial to choose the right kind of glue, carefully crafted bonding surfaces, providing the best adhesion (bond) adhesive composition with the material of the bumper. It should be noted that subsequent grinding and paint with high temperature drying should be subject to a Properties of the bond, so it is preferable to perform all work in one workshop. Only in very rare cases, repair the bumper becomes economically less profitable than its replacement. These masters never will refuse to repair, even if it is a unique tuning bumper, custom-made. Repair or tuning body kit bumper technology is no different from the native bumper repair, established by the izgotovitilem car.