Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

Cleaning and Checking the Function of the PCV Valve

Model: Toyota Rav 4 Xa30, MK 3 - Years: 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
Part: Valve

See other generations:
Video tutorial

The PCV valve (Positive Crankcase Ventilation) serves to reintroduce gases generated by combustion back into the combustion chamber rather than releasing them into the atmosphere, which has obvious environmental consequences, as these gases are contaminated with oil vapours and unburnt diesel; this phenomenon is known as blow-by, which occurs when gases in the combustion chamber are at maximum pressure and some pass through the piston rings to reach the bottom of the engine block.

This leads to an increase in pressure beneath the piston crown and throughout the sump, creating resistance during the descent of the piston.

Therefore, during regular fluid level checks, you can also clean and check the operation of this valve.


Updated on 19 February 2026 by ScegliAuto


Related tutorials

Replacement and Maintenance of the Valve
Replacement and Maintenance of the Valve
Toyota Rav 4 (2006-2013 / Xa30, MK 3) Remove the engine cover by unscrewing the 2 bolts. Now, at the top left, you can see the PCV valve and remove it by moving the clip and disconnecting…
How to Remove the EGR Valve on a Toyota Rav 4
How to Remove the EGR Valve on a Toyota Rav 4
Toyota Rav 4 (2006-2013 / Xa30, MK 3) How to remove the EGR valve on a Toyota Rav 4? Lift the bonnet and secure it. Then, using a screwdriver, unscrew the locking pins of the ventilation …
How to Remove the EGR Valve on a Toyota Rav 4
How to Remove the EGR Valve on a Toyota Rav 4
Toyota Rav 4 (2000-2006 / MK 2, Xa20) How do you remove the EGR valve mounted on a Toyota Rav 4? Lift the engine bonnet and secure it, then use a screwdriver to unscrew the locking bolts …

How to Set the Time in an Audi A4?

In this tutorial, you will see how to set the time in an Audi A4, a very simple and quick operation to perform after replacing the battery or when the time changes. First, insert the key and turn on the instrument cluster. Then, press the "SETUP" button located on the center console. Next, press the upper left arrow button, navigate to the "Time" option, and use the central knob to adjust the clock. Finally, set any necessary formats and save by returning to the main screen.

Watch the video!


by ScegliAuto

More videos