Ej20 engine valve adjustment3/13/2023 Most modern engines have valves that are self-adjusting, and don’t ever need to be adjusted. An engine valve adjustment doesn’t actually adjust the valve, it simply adjusts the space between the valve and the camshaft, so that all the parts can function properly. When that happens, it’s time for an engine valve adjustment. When that happens the timing of the valves will be thrown out of whack, and more importantly, the valves may not open and close properly which keeps them from doing their job. Over time, the space between the valve and the camshaft can change. So, if you feel like you had a productive day, just imagine the kind of day your engine valves had. It’s a basic, but vital process, that is repeated thousands of times every minute. ![]() Pushrods are also added to the mix on some cars. ![]() The camshaft, rocker arms, and valve lifters are responsible for opening the valves, and a spring closes them. ![]() The intake valves let air and fuel (or just air in some cases) into the engine and the exhaust valves let spent gases out. Every cylinder in the car’s engine has valves that sit on top of the cylinder. The basic concept of an engine valve is simple. They’re tiny, yet they’re one of the most important and commonly used components in your entire car.
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