What should I do if the Great Wall c30 engine lacks power?

Insufficient cylinder pressure will make the engine difficult to start, unable to work and increase fuel consumption. The cylinder pressure of the Great Wall Ito C30 wing is 450Kpa~750Kpa. The detection method of cylinder pressure is to select the appropriate cylinder pressure gauge, clean the piston, unscrew the piston, remove the air filter and make the throttle valve fully open. Install the upper cylinder pressure gauge, unplug the fuel injection harness plug, move the ignition switch for 2~3 times, and observe the pressure gauge value. And compare it with the standard value to judge whether the cylinder pressure is normal.

The causes and detection methods of insufficient cylinder pressure include: serious wear of piston ring or cylinder liner, poor contact between valve head and valve seat, and air leakage. These faults can be observed by dripping lubricating oil in the gap between piston ring and cylinder wall.

Sex to judge; Insufficient elasticity of valve spring or spring fracture; Valve clearance is too small. The valve clearance of Great Wall Ito C30 is 0. 15 ~ 0.25mm, which can be detected with a feeler gauge. The piston ring is misplaced or stuck in the ring groove; Cylinder gasket is damaged; Cylinder-to-cylinder ventilation and cylinder-to-outside ventilation can measure cylinder pressure and apply soapy water on the outer surface of the cylinder.

In order to correct the failure of insufficient cylinder pressure, the relevant parts should be inspected first, and the corresponding measures should be taken after finding the reason: replacing the piston ring and replacing the cylinder liner as appropriate; Valve head and valve should be ground and repaired, and new products should be replaced if necessary; Replace the valve spring; Adjust the valve clearance; Remove carbon deposits on piston rings and cylinder liners, and readjust or install piston rings. For the piston ring that is easily stuck in the ring groove, use sandpaper for side grinding and then reinstall it. For those piston rings with excessive clearance, they should be replaced. Replace the cylinder gasket, find out the cause of the damage of the cylinder gasket and eliminate it. In addition, the loose spark plug will also cause insufficient cylinder pressure and should be tightened.