Compared with the gasoline engine, diesel engine abnormal sound diagnosis is more difficult to grasp, this is decided by the structure characteristics and working characteristics of the diesel engine, such as compression ratio, thermal load, work is relatively rough, big noise, broken oil cannot instantly, and even some diesel oil at the opening of the position of the people not easy to close, to the diagnosis of abnormal noise also brings inconvenience. However, the abnormal sound of the diesel engine has its specific rules, as long as the analysis and comparison, look at the phenomenon of grasping the essence, it is possible to find out its regularity.
Cam ring
Baotou North Benz parts camshaft percussion sound and rhythm, in the ring, while the camshaft shaft near the vibration.
The reason
Each hole is not concentric.
Cam shaft bending or deformation.
The clearance between shaft hole and camshaft is too large.
Baotou North Benz parts camshaft axial movement.
The diagnosis and treatment methods
Use a stethoscope or a screwdriver in the vicinity of the cylinder body camshaft, if there is vibration sound, can be diagnosed as the bearing ring.
Sound law is generally idle, medium speed is more clear, high speed when the sound of clutter or weaken.
If the camshaft is moving, the axial clearance adjustment should be carried out.
Baotou North Benz parts camshaft deformation or bearing clearance is too large should be repaired.