What role does the valve rocker frame set play in an engine? What are the abnormalities in its parts? What are the effects on the engine?

The valve rocker set is a setup for overhead valve engines. Overhead valves open from the top down instead of from the bottom up, so the valves open not only in the opposite direction from the side-mounted valves, but also far away from the cam. Therefore, a rocker arm set including a valve push rod is installed to change the direction of thrust and linkage with the push rod to achieve normal operation of the overhead valve. Abnormal rocker arm frame group on the engine

motor gas distribution is very unfavorable, its abnormalities and the impact on the engine as follows.

(1) rocker It shaft wear is too large rocker arm has a strange sound, rocker arm oil pressure is reduced.

(2) rocker arm bushing wear loss of round is too large rocker arm rattling, bushing side of the oil leakage is too large, affecting the amount of oil.

(3) rocker arm head arc wear valve foot clearance is not allowed, it is difficult to exclude when adjusting, resulting in rattling sound.

(4) rocker arm adjusting screw spherical skew wear, valve foot clearance is not allowed and sometimes large and small, valve foot noise.

(5) rocker arm adjusting bolt and thread damage of more than two teeth, the bolt will loosen, the valve foot lash abnormality, and even serious malpractice.

(6) rocker arm oil hole clogging valve stem head and rocker arm head, adjusting screw spherical surface and push rod steel bowl to increase wear and tear, so that the noise is getting bigger and bigger.

(7) rocker arm bracket of the center of the inconsistency of the rocker arm shaft bending or fracture, rocker arm frame skewed rocker arm can not work properly.

(8) rocker arm bracket oil hole blockage or not on the oil will accelerate the rocker arm, rocker arm shaft and active parts of the wear, the serious case will be bitten, resulting in the rocking mouth can not work, the engine quickly stalled.

(9) rocker arm frame on the oil amount of excess oil from the conduit into the cylinder, resulting in excessive carbon deposits, will accelerate the wear of the cylinder.

(11) rocker arm end face clearance is too large, spring failure, rocker arm tampering, valve stem skew swing, affecting the normal operation of the valve.

(12) valve stem without oil seal ring or valve stem head without oil cap will make the splash of oil from the conduit into the cylinder, resulting in excessive carbon deposits, increasing the cylinder wear trigger. Into the cylinder oil combustion will be discharged from the exhaust pipe, so that the discharge is blue smoke.

(13) valve push rod bending and both ends of the spherical surface deformation will make the valve foot clearance is getting bigger and bigger and produce noise, on the charging volume is very unfavorable. Sometimes also lead to the push rod and rocker arm off, so that the valve stop working, then the engine naturally stalled.