Heat clearances on the valves and the magnitude of compression

To clarify the causes of poor acceleration dynamics car should check the thermal regulation of clearance on the valves and the amount of compression in the engine cylinders. Data on the value of the compression and clearances on the valves must be taken from specific directories. When checking the compression is important temperature warmed-up engine, good condition and serviceability of the battery on the starter. Before measuring the need to unscrew all the spark plugs. The air intake valve on the carburetor is opened. For the safety of the work must disconnect the ignition coil or take any other action to prevent sparks. If the carburetor has a solenoid valve, then it too should be disabled before testing. All disconnected wires should not accidentally fall on the mass of IPT on the hot muffler. Measure the compression to squeezed with a clutch pedal. Throttle position at the time of measuring the compression also has its value. Open flap facilitates filling the cylinders with air. Closed door - makes it difficult to fill. Therefore, the values ??of compression at different throttle position may be different. Measuring the compression occurs when the rotation of the starter motor to the maximum index for each cylinder in sequence. For the reliability of measurement results can be several times to check each cylinder in the open and closed throttle position. The results of measurements should be recorded. To get an unbiased opinion on the state you want to check the engine compression at three different instruments, as compressometer - rather rough instrument and make some conclusions after a single measurement would be irresponsible. Loss of power in general weak compression in the cylinders is not surprising. Loss of power in good condition, the compression means a fault in power systems, ignition, etc. If the magnitude of compression in one cylinder differs from the other at 1 kg / cm, this indicates a fault in the cylinder.