PCV Valve Replacement
How are pcv valve issues diagnosed?
Understanding what the PCV valve does make diagnostics a breeze for anyone. If the technician suspects the PCV valve has failed, he will remove the valve, and use his hand-help pump to apply vacuum, then forced air, to see how the PCV reacts. If air can freely move through the valve in the intended direction, it is working properly. The valve has failed the test if air moves through in both direction or neither direction, or if air only moves in the wrong direction.
How is a pcv valve replaced?
Replacing the PCV valves can take seconds on some vehicles, and even an hour or two on others. In all cases, replacing the part is easy, but accessibility is not always on the technician's side. Vehicle are purpose-built, and most are built to be economical and reliable. This means placing components that frequently fail in expected positions, and unobstructed from removal. For vehicles that are built for high-luxury, performance, or off-road use, the placement of components is strictly for the purpose of enhancing performance, and may be very complicated to service.
RepairPal Recommendations for pcv valve issues
We recommend using the OEM PCV valve if possible. The manufacturer will update parts as needed, and having the latest revision could save time, trouble, and money in the future.
What to look out for when dealing with pcv valve issues
Engines with clogged PCV valves should be examined to discover the purpose of the clogged valve. Under normal conditions, the PCV valve should not clog. If clogging occurs, the engine should undergo a brief scan to inspect the engine running conditions. Lastly, the engine should be checked for engine sludge, as this is the major cause for many issues, including PCV valve clogs, and catching engine sludge early is vital to the longevity of the engine.