PCV Valve Cleaning - Volkswagen Polo
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Published 2024-03-31
The PCV or Positive Crankcase Ventilation valve is a one-way valve attached to the crankcase of the engine. When an internal combustion engine is running, the majority of the waste gases are vented out through the exhaust system. However, some waste gases can be forced past the pistons and into the crankcase. The PCV valve allows these gases to be vented from the crankcase and back through the intake system to be re-burned. Over time, the PCV valve can get clogged up with sludge and soot and stop working properly, which can allow the gases to accumulate in the crankcase. These gases cause a build-up of pressure in the crankcase which could cause a number of problems, such as blown gaskets or damaged seals, leading to oil leaks. The PCV system reduces harmful vehicle emissions so it is an essential part of the system. PCV valves are a relatively cheap part to replace but it might be worth cleaning them first before renewing them.
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All Comments (6)
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I was just thinking of buying a new one, good thing I saw your video
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Мога да ти дам съвет за следващо видео. Покажи как се чисти шумата под кората на чистачките
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My 2004 vw polo 1.4 petrol has done 190,000 miles on the original pcv valve just replaced it plus cam sensor just in case as had a few issue recenlty one being egr valve failing whch I believe was the original thats also been replaced.
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Excuse me, your saying in the description that the PCV valve should only allow airflow from the crankcase to the intake manifold, but when you clean it you spray through it the other way around, no?
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What is the purpose of cleaning this part?
