The engine at work, if the exhaust sound pops around the cylinder, or hear the radiator “grunt” for sound, or check cylinder pressure adjacent two cylinder pressure is very low, showed that the cylinder liner has been damaged.
The reason
Baotou North Benz parts engine injection advance angle is too large, gas pressure rise is too high, the impact of the heavy load of the cylinder pad.
Tighten the cylinder head bolts of the order and method is not correct, the tightening torque is uneven, so that the cylinder liner is not fully fit in the cylinder head of the joint surface.
Cylinder head does not follow the procedure to make the cylinder head deformation.
Cylinder liner quality is poor, uneven thickness, especially the gasket around the cylinder is not uniform, the most likely to be high-pressure gas.
The preventive measures
When installing the cylinder gasket of the North Benz parts in Baotou, clean the surface of the cylinder head and the cylinder block.
When installing, pay attention to the direction of the marked side, the side with the part number is raised upwards, so that the positioning ring is exposed to the cylinder pad, and the water hole and the oil hole are aligned.
When installing the cylinder gasket, we should also pay attention to the water, the oil hole and the positioning pin.
If the replacement of the new cylinder pad, should check whether the thickness of qualified.
Installation of the Baotou North Benz parts cylinder head bolt, should be in the threaded part of the oil, reduce friction, so that the bolt compression cylinder cover.
We must follow the tightening sequence and the requirements of the times and tighten the cylinder head bolt tightening torque, to reach the specified value.
The use should check the fuel injection advance angle, to ensure compliance with the standard.