What does the air lock crack mean?
Air lock crack refers to the situation where the engine valve is cracked or broken. This condition is usually caused by a variety of factors, including the valve rod end, adjustment screw or rocker arm wear or improper adjustment, resulting in excessive valve clearance, which in turn causes the valve tappet end to collide with the adjustment screw or the head of the valve rocker arm to collide with the valve end, which may eventually lead to valve cracking. In addition, excessive wear of the CAM, valve spring seat off, valve tappet fixing nut loose or adjustment bolt end face uneven, valve duct carbon accumulation and other factors may also lead to valve cracking. In order to avoid these problems, it is necessary to check and maintain the engine regularly to ensure the normal operation of various components .
Is the air lock blade?
Air door lock plate is a part, its role is to realize a one-way connection between the valve and the spring seat and lock it to ensure that the valve can operate normally. However, when the valve lock plate fails, it will have a great impact on the engine. For example, the lock plate can cause the valve to close loosely, which causes the compression ratio to be insufficient, and then cause the engine to lose cylinder. In severe cases, the loss of the lock plate can cause the piston to be punched through the valve, and then scrap the engine.
There are two ways to connect the valve stem to the spring. One is the lock clip type, which is equipped with two semi-circular conical lock clips on the groove of the end of the valve rod, and the spring seat compacts the lock clip so that the tight hoop is in the end of the valve rod, so that the spring seat, the lock clip and the valve are connected into a whole, and the valve moves together. Another way is to use a locking pin instead of the radial hole of the lock clamp pin, and connect through the locking pin.
What are the main causes of valve cracking?
The main causes of valve cracking include improper wear or adjustment, CAM wear, valve spring seat off, loose nut or bolt end face uneven, valve duct carbon accumulation.
Improper wear or adjustment : Improper wear or adjustment of the valve rod end, adjusting screw, or rocker arm may result in excessive valve clearance, which may cause the side-mounted valve tappet end to collide with the adjusting screw, or the head of the rocker arm of the overhead valve to collide with the valve end, resulting in valve cracking.
CAM wear : excessive wear of the CAM may cause the tappet to jitter during operation, which will increase the stress of the valve rod and may lead to valve cracking in the long run.
valve spring seat off : The fall of the valve spring seat may cause the valve to be subjected to abnormal impact during the closing process, resulting in cracking.
Loose nut or uneven bolt face : Loosening of the valve tappet retaining nut and uneven adjustment bolt face may cause abnormal stress on the valve and eventually lead to cracking.
valve catheters : Excessive carbon accumulation in valve catheters may hinder the movement of the valve, resulting in additional stress and eventually causing the valve to crack.
These factors may lead to engine valve cracking, therefore, it is necessary to take appropriate repair measures in time, including readjust valve clearance, replacing worn parts, cleaning carbon deposits, etc., to ensure the normal operation of the engine .
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