Where is the old Jetta exhaust check valve?

Find the position of the secondary air inlet pump facing the engine, and the valve connected to the air outlet pipe of the air pump is the waste gas valve. Automobile exhaust check valve is mainly used to control the exhaust gas involved in combustion, which is beneficial to environmental protection and reduces the emission of carbon and oxygen compounds without affecting the normal dynamic performance of the engine. During the use of the waste gas check valve, the waste gas in the box is introduced into the intake manifold to slow down the engine and discharge harmful gas, so that the pressure in the crankcase is always lower than atmospheric pressure, reducing the oil leakage of the engine, keeping the crankcase ventilated and keeping the engine oil fresh. If the engine oil in the crankcase deteriorates and blocks the exhaust check valve, the vacuum degree of the intake manifold will increase with the increase of the throttle opening, which will lead to the increase of the oil output of the automobile nozzle and the increase of the automobile fuel consumption. Million car purchase subsidy