What happens when a valve goes bad?
What happens when a valve goes bad? Engine Power Loss If your valve guides and seals are leaking, oil can accumulate on the top of the valve and cause it lose its seat or create a gap. This could cause compression issues, which lead to poor combustion and power loss. Burnt valves are another problem that contributes to power issues. What does valves do in an engine? The valves are installed in a part of the engine called the head and are responsible for letting air and/or fuel into the cylinders to be combusted -- those are called intake valves...