Question about 2001 Volvo S40

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Pcv valve location

2005 volvo s40 with check egine light on makes a whistling noise from the engine. I was told to check the pcv valve. could you tell me where it is located and how I can replace it?

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  • zest4itall Mar 16, 2009

    I have a 2004.5 S40 and I have same situation. I thought this might be the culprit.



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Volvo s80 y reg 2.4 runs ok little bit lumpy tickoover when warm but very loud whistling noise take dipstick it stops but very big suction from tube not pressure it is not breather box under manifold

Posted on Mar 12, 2010


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The check engine light is on with my 2005 s40 Volvo. Changed original spark plugs, told fuel injectorsq need to be replaced

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Oct 04, 2014 | 2005 Volvo S40

1 Answer

How do i change the pcv valve on my 2004 volvo s40? and where is it located?

location:Its a flame trap it separates the oil from ai

  • 1

    Turn the Volvo 850 off and allow the engine and its components to cool for 30 minutes.

  • 2

    Open the hood of the Volvo 850 by pressing the hood release button within the vehicle. Locate the PCV valve; the valve is identified as a small rubber valve located on the engine crankcase. You will also notice a small hose sticking out of the end of the valve. If needed, read the Volvo 850 owner's manual for more information.

  • Disconnect the hose from the valve by pulling the hose out of the valve. The hose will come off the valve with minimal force.

  • 4

    Turn on the engine of the Volvo 850. Place your finger over the hole in the valve where the hose was connected. If you feel a strong suction, the valve is working properly and fine. If you do not feel a strong suction, the valve may be clogged and needs replacing.

  • 5

    Turn off the engine of the Volvo 850. Use needle-nose pliers and grip the valve. Pull the valve off of the crankcase.

  • 6

    Install a new valve by putting the valve in place on the crankcase. Insert the hose into the new PCV valve. Secure the new valve in place by pushing it down until it locks into place. Close the hood of the Volvo; pull up on the hood to ensure the hood is shut properly.

    X2 Performance Chip

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    2006 volvo s40 50,000 mi. noticed a noise under hood that sounded like a belt slipping. sounded more like it was coming from the back of the motor. With the car running,I took the oil dip stick out and the...

    The oil filter housing also houses the pcv system. What causes the noise is that there is a check valve in the pcv system that is supposed to regulate the pressure in the crankcase. The valve gets stuck and causes vacuum to build in the crankcase, which in turn sucks air wherever it can causing the noise, which is also why when you pull the dipstick it stops. This can also cause a check engine light with codes for fuel trim. The oil filter housing will need to be replaced. Good news is that Volvo extended the warranty on these to 100K miles so it should be free of charge at the dealer. One thing to watch for is oil leaks after the replacement from the camshaft seals. If air can get past a seal, usually oil can too. If the seals leak too long it can contaminate the timing belt and cause it to break, which causes a lot of damage.

    Jan 06, 2010 | 2006 Volvo S40

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    2004 Volvo S40 Noise and check engine light. Any ideas?

    If the noise is a whistling or screeching type noise it means the breather assembly (integrated in the oil filter housing) has gone bad, its part of the PCV system. Good news is they are on an extended warranty now, I believe 10 years, 100K miles. Take it to the dealer for a free fix :)

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    2007 volvo s40. engine has a whining noise however when the oil cap is removed the noise goes away. If i put my hand over the oil fill hole the suction is very strong and the noise comes back. too much...

    You will need to change the oil filter housing and the hose that attaches to it, the amount of vacum going thru this box has changed causing an excess in the crank case. do not drive for you may cause damage to cam and crank seals

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    Read my other posts to the same problem. if the noise goes away with the oil filler cap removed you need to replace the oil filter housing and hose. good luk

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    It sounds like sucking air

    Sounds like it's time for some basic maintenance. Some of the emission controls require changing. More specifically, the PCV. Positive Crankcase Valve.

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    The best thing is to go to your local Volvo maintenance shop or Volvo experts to find out whats the problem..usually the coomon ones I think is the programs inside its ECU try this..ask the volvo experts to reset the ECU and lets see..if problem arise then it is no doubt you might need the sensor..hope this help..

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    Engine management light volvo s40 problem

    sounds like thats correct. fault camshaft position sensor or wiring to ecm is prob

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