Santiago Soluciones

What happens if the pvc valve fails? PVC function and location

Hello there, come on in! Today we’ll be talking about  what a pvc valve is, it’s function and it’s most common problems.I’ll be telling you as well how to easily test the valve at home, so Stick till the end to find out.

First off, it’s the Location

The PVC valve is always located in the motor monoblock, or in the valve cover, has a distinctive L shape, although models change depending on the type of car. 

This valve is in charge of releasing motor pressure, using a sphere, or an internal spring, that allows  the valve to open and close. 

Now, the signals that indicate problems or failures in the pvc valve are pretty clear

If you noticed any of the following problems, most likely you’ll need to replace the pvc valve

1 – White smoke in the exhaust motor 

When a pvc valve is damaged and stuck in an open position, the motor oil goes through the duct that connects the valve to the engine intake hoses. When this happens, it contaminates the air filter. the air ducts, the body of acceleration, the IMRC control, and more. 

Causing that, when the oil reaches the combustion chamber, this one gets burned with a mix of air and gasoline that provoques the white smoke. 

2 –  Air filter and/ or air ducts contaminated because of oil

As said before, when the open position of the air filter is stuck the filter gets drenched in oil and loses all possibility to filter the dust to the motor. 

3 –  Engine idle failures (rpms variation)

Once the admission duct sensor, MAF sensor, IAT, body of acceleration and the IMRC are contaminated, the engine may have problems in the acceleration, turn off at a stop or stop accelerating. 

 4 – Oil leaks in seals or gaskets

When the pvc valve gets stuck in a close position, the gas generated due to the combustion of vapors of the oil puts so much pressure that it ends up damaging the seals and  gaskets. 

The engine will start getting stains in their interior, allowing more damage to happen or will run out of oil.

5 –  Fault codes related to throttle body, IMRC system, MAF sensor, and IAT

But what happens if you don’t replace this valve on time?

  1. If the PCV valve sticks in the open position, oil will travel through the intake ducts and the engine can run out of oil in a few thousand miles.
  2. You’ll have Oil contaminated intake manifold
  3. And Being stuck open may damage components such as the air filter, MAF sensor, IAT sensor, throttle body, or IMRC control. Components that may and will be a pain in your pocket if you need to replace them

Here are a couple steps to check if your PVC valve is functioning properly:

First – We let the engine come to its normal operating temperature.

Then – We Disconnect the hose coming out of the pvc valve (RPMs will drop).

Now – We cover the hose with our finger and check if there is suction.

We follow by – Connecting the hose back to the pvc valve and removing the valve.

And finally – We plug the inlet of the pvc valve with our finger and check if there is suction.

I recommend you to check the pvc valve in each maintenance of your car, it will help to prevent a lot of problems!

If this video helped you, don’t forget to subscribe, leave a like and tell us in the comments down below which other problems you have in your car. See you next time!

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