Question about 2001 Volvo S40
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?
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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Posted on Jan 02, 2017
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Oct 04, 2014 | 2005 Volvo S40
Nov 12, 2013 | 2005 Volvo S40
Turn the Volvo 850 off and allow the engine and its components to cool for 30 minutes.
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.
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.
Turn off the engine of the Volvo 850. Use needle-nose pliers and grip the valve. Pull the valve off of the crankcase.
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.
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