Where is the PCV valve installed?

[LaylaLynn]

PCV valve installation location: A pipe from the engine valve cover connects to the engine intake pipe. The arrangement of the PCV hose varies depending on the engine model. Below is relevant information about the PCV valve: 1. Function of the PCV valve: At the end of the engine combustion process, some unburned mixture leaks into the crankcase under high pressure from the piston rings. These blow-by gases can escape into the atmosphere, causing pollution. If these gases are not removed, they can dilute the engine oil in the crankcase, leading to oil degradation and premature wear of engine components. Therefore, a PCV valve is installed on the valve cover to allow these exhaust gases to re-enter the engine through the intake manifold for re-combustion. 2. PCV valve inspection method: After reinstalling the PCV valve, remove the crankcase intake pipe from the air filter and lightly cover the pipe opening with a thin piece of paper. As the pressure in the crankcase decreases, the paper should be noticeably sucked toward the pipe opening. Additionally, after stopping the engine, remove the PCV valve and shake it by hand to check. If a "click" sound is heard, it indicates that the PCV valve is flexible and usable.

[VanMarcus]

Last time my vintage car had unstable idling, the mechanic pointed at that black tube on top of the engine and told me the PCV valve was stuck at the valve cover, looking like a little mushroom head. This thing connects to the intake manifold, specifically sucking away oil vapors escaping from the engine. Old cars are most prone to clogging—when sludge blocks the valve, it's like a person struggling to breathe. My car was shaking badly precisely because it was severely clogged, and only after replacing the valve did it calm down. Now I check it every two oil changes, since the engine's health relies entirely on it for ventilation.

[CamilaMarie]

Poking around the engine bay always reveals little surprises, like the PCV valve squatting in the corner of the valve cover. This gadget connects the crankcase to the intake manifold, specifically handling blow-by gases from the combustion chamber. During modifications, I've removed it twice – roughly fist-sized, with rubber hoses attached to an aluminum alloy valve body. If you hear a hissing sound at idle, chances are the valve's sealing ring has aged. Replacing it yourself is straightforward – just unplug the hose and remove the screws. Though its placement can be tricky; some vehicles require removing the intake manifold for proper access.