What exactly is a “burnt valve” and what causes it?

A combustion valve can occur for one of several reasons but a potential problem is that the valve is not adequately sealed and hot engine gas leakage during the combustion phase causes a seal formed by the valve and the valve seat To pass through. When there is no seal, high temperature exhaust gas escapes from the valve (it may be generated by the intake valve or the exhaust valve, but it is more common with the exhaust valve) causing serious damage. Burned valves are not usually the cause of the problem, but it is caused by more problems

A normally operating four-stroke engine has a valve that allows the incoming air / fuel mixture to enter the cylinder (or only the air on the directly injected engine) and allow the exhaust to escape from the exhaust pipe . The valve itself can not tolerate the extreme conditions of the combustion process. If the valve is sealed to the seat (embedded in the head) closed, the recovery rate of the valve is heat transfer. The head absorbs some of the heat collected by the valve. This heat is then transferred to the coolant system, which allows the coolant system to remove it from that area and to activate the item when it is deemed normal. If the valve does not allow complete closure for any reason, air / fuel and exhaust leakage during the combustion cycle will occur during the compression cycle. This can cause several different problems within the engine.

The valve may enter a non-sealed condition for various reasons. These include, but are not limited to:

Either of these, you may leave the valve open during a combustion event. This allows very hot gases to escape from the valve. It can not tolerate excessive heat as it is not allowed to be completely fixed. It will stay on the valve head and it will be damaged soon

Another common type of valve failure is a valve combustion or combustion valve. Basically this is caused by combustion gas escaping between the valve and the valve seat without proper sealing. The hot combustion gases pass through the valve and the valve starts burning off the end of the valve. Normally, this type of fault only affects the exhaust valves, but it also damages the intake valves. Combustion valves can cause problems in vehicle performance and fuel consumption. Idle speed, power reduction, tempering and fire are all symptoms of valve burns. If there are such symptoms in the engine, we recommend that a reliable mechanic check the car. Continuous operation using combustion valves may further damage the engine. Repair fee will be charged.

A combustion valve can occur for one of several reasons but a potential problem is that the valve is not adequately sealed and hot engine gas leakage during the combustion phase causes a seal formed by the valve and the valve seat To pass through. When there is no seal, high temperature exhaust gas escapes from the valve (it may be generated by the intake valve or the exhaust valve, but it is more common with the exhaust valve) causing serious damage. Burned valves are not usually the cause of the problem, but it is caused by more problems