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How to avoid valve burnout with LPG and what needs to be done to prevent the negative consequences of small thermal valve clearances at an early stage. This video is an instruction on how to check the condition of the valves using an OBD diagnostic device without mechanical intermediaries. *Beginning of the story: The car in the video came to me 35 thousand years ago. Someone installed LPG, I adjusted it. After this run, the owner of the car began to worry about the condition of the valves, since in this engine the thermal clearances are adjustable, and the valves and seats wear out faster on gas (so they say). *Result: The engine works fine. Everything is OK!