Good Price Diesel Engine Parts VE Pump Cam Disk NanJing 210 Cam Plate

The reasons for cam disc failure are relatively complex, involving multiple aspects such as material, manufacturing process, and use environment. The following are some common factors:

Material and manufacturing defects
Material problems: If the material quality of the cam disc is poor, such as uneven carbon content and impurities, the strength and wear resistance of the cam disc will be reduced. Under long-term high-load work, it is easy to cause problems such as wear, deformation and even breakage.
Manufacturing process defects: In the production process of the cam disc, if there are problems in the process links such as forging, casting, and machining, it will cause defects such as pores, sand holes, and cracks inside the cam disc, or the machining accuracy of the cam profile will not meet the standards. These problems will cause the cam disc to be unevenly stressed during operation, accelerating wear and damage.

Lubrication and wear problems
Poor lubrication: The cam disc needs good lubrication to reduce friction and wear during operation. If the engine's lubrication system fails, such as oil pump failure, oil filter blockage, oil line leakage, etc., the cam disc will not get enough oil supply, which will intensify the friction between the cam and the valve tappets, rocker arms and other components, causing wear and tear on the cam surface, and even ablation.

Natural wear: As the vehicle's use time and mileage increase, the constant friction between the cam disc and related components will cause the cam surface to gradually wear. Especially under conditions such as frequent engine start and stop, high speed and high load operation, the wear will be more obvious. When the wear reaches a certain level, the profile of the cam will change, affecting the normal opening and closing of the valve and the performance of the engine.

Installation and assembly problems
Improper installation: When installing the cam disc, if the installation position is incorrect, such as the relative position of the camshaft and the crankshaft is incorrect, the tightening torque of the cam disc mounting bolts is uneven or too large or too small, etc., the cam disc will be subjected to additional stress during operation, causing it to deform and damage.

Matching clearance problem: If the matching clearance between the cam disc and the valve tappet, rocker arm and other components is too large or too small, it will affect their normal operation. If the clearance is too large, the impact and vibration between the components will be aggravated, resulting in abnormal wear and noise; if the clearance is too small, the friction resistance between the components will increase, and even jamming will occur, affecting the normal opening and closing of the valve.

Impact of other related component failures
Timing system failure: Failure of components such as timing belts, chains or timing gears, such as belt aging, breakage, chain skipping, gear wear, etc., will cause the rotation of the cam disc to be out of sync with the rotation of the crankshaft, causing the opening and closing time of the valve to be disordered, thereby causing the cam disc to bear abnormal impact force and torque, which is easy to cause cam disc failure.

Valve failure: If the valve is stuck, bent, or poorly sealed, the cam disc will be subjected to additional resistance and impact when driving the valve movement. Under long-term action, it will accelerate the wear and damage of the cam disc.

Working environment and use conditions
High temperature impact: The engine generates a lot of heat during operation. The cam disc is in a high temperature environment for a long time. If the engine's cooling system fails, resulting in poor heat dissipation, the temperature of the cam disc will be too high, thereby reducing the strength and hardness of its material, accelerating its aging and deformation.

Frequent start-stop and high-load operation: When the vehicle is driven in urban conditions with frequent start-stop, or often runs at high speed, heavy load and other high-load conditions, the alternating load on the cam disc will increase, which may easily lead to fatigue wear, cracks and other faults.