How to check Audi's gas leak and how to judge Audi's gas leak

1, when the engine is working, if the valve leaks, it means that the compression force of the cylinder is insufficient, the combustion is poor, the exhaust regularly emits black smoke or white smoke, and at the same time, the fuel consumption increases and the power decreases;

2. If the intake manifold is overheated at the same time, the central intake pipe has air leakage sound, and even the air filter has backflow and gas channeling, indicating that the valve is seriously leaking.