Prevention
To disconnect the VAT plug from the ignition or distributor block.
The compression in cylinders of the engine is checked for definition of a technical condition of piston rings and density of a prileganiye of valves to saddles. A compression check at the opened throttle and air zaslonka, the turned-out spark plugs and well charged storage battery. The compression in separate cylinders should not differ strongly. The smallest pressure in cylinders should be not lower than 689 kPas and make not less than 70 % from the maximum value for all cylinders. On each cylinder make measurements during four steps of compression.
Normal state of piston rings and valves
Pressure in cylinders accrues quickly and evenly to nominal rate.
Wear of piston rings
On the first step of compression pressure low, on the subsequent steps pressure increases, but does not reach nominal rate. At the gulf in cylinders of engine oil (on 20–25 ml) the compression considerably increases.
Leaky prileganiye of valves to saddles
On the first and subsequent steps of compression pressure remains low. At the gulf in cylinders of engine oil the compression essentially does not improve. For the gulf in cylinders it is necessary to use the piston supercharger.
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