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Expert Mechanics
26
Total expert pcv valve replacement mechanicsNumber of Ratings
9
Total number of pcv valve replacement reviewsAverage Rating
Average user rating for pcv valve replacement bookingsGarage in Swanscombe, 9 years of experience
Mobile mechanic in Aylesford, 10 years of experience
CURTIS
BMW 3 Series • Crankcase ventilation valve replacement
JIAN
Garage in Alcester, 25 years of experience
DAVID
BMW 3 Series • Crankcase ventilation valve replacement
KIERAN
Volkswagen Polo • Diagnostic Inspection
Garage in Wrexham, 25 years of experience
PHILIP
STEVE
BMW 1 Series • Major Service
Read our short guide with information on costs, symptoms and more.
The valve is part of the positive crankcase ventilation system that is attached to the engine. Simply put, the system recirculates the harmful gases that develop inside the crankcase back into the cylinders to be reused in another combustion cycle. The valve regulates how much of and when the gases are recirculated back into the cylinders.
Over time problems can occur with the PCV valve, this is mostly down to poor maintenance. The valve can, for example, get clogged up with oil sludge. Inadequate oil change intervals are a main cause for the valve going faulty. Should this happen, then the engine is at risk of being supplied with too little air, leading to a fuel mixture that is too rich and, potentially, a damaged engine.
It is therefore advisable that the PCV valve is cleaned or replaced each time the spark plugs or air filter is replaced. Should you experience an issue like those listed earlier, it is advisable to have the PCV valve inspected and, if necessary, have it replaced.
Seeing that PCV valve is prone to wear it should at least always be replaced as and when stipulated in the guidelines set out by your car's manufacturer.
The cost of replacing the valve of the positive crankcase ventilation (PCV) system depends on your car and what parts your car's manufacturer recommends using for the replacement. Find out what you could save by having your PCV valve replaced by Clickmechanic, by selecting your car at the top of this page!
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