How to distinguish the waste gas valve burning oil?

Method for judging whether the waste gas valve is damaged 1:

You can directly unscrew the clamp on the throttle door, take off the trachea, open the throttle with a good hand, then put the dipstick in, explore it to the end, and then take it out for inspection. If there is only some putty on the dipstick, there is no problem, but there is oil to prove that the waste gas valve is broken.

Method 2 for judging whether the waste gas valve is damaged:

Start the engine, let the engine run at idle speed, remove the vacuum hose on the exhaust gas recirculation valve and connect the manual vacuum pump. Then air is pumped in to directly add vacuum to the diaphragm chamber of exhaust gas recirculation. Under normal circumstances, the engine will have unstable idle speed or flameout, indicating that the exhaust valve is also normal. If not, it proves that the exhaust valve is broken.