2000 volvo v40 1.9 crankcase ventilator hose

Positive Crankcase Ventilation (PCV) Valve Removal and Installation

1. Remove the intake manifold. For additional information, refer to Section 303-01 .

1. Disconnect positive crankcase ventilation (PCV) hose.

Crankcase ventilation system is used to consume crankcase vapors created during the combustion process instead of venting them to the atmosphere.
Fresh air is supplied through a filter to the crankcase, the crankcase mixes the fresh air with the blow-by gases and then passed through a positive crankcase ventilation (PCV) orificed tube into the intake manifold.
The PCV orificed tube restricts the flow rate of the blow-by gases using a 3 mm (0.118 in) (a) orifice located at the end of the tube. If abnormal operating conditions arise, the system is designed to allow excessive amounts of blow-by gases to back flow through the crankcase vent tube into the throttle body in order to be consumed by normal combustion. Positive Crankcase Ventilation Hose/Pipe/Tube Replacement
Remove the two nuts (2) from the fuel injector sight shield (1).
Lift the sight shield (1) from the front and pull forward to disengage the rear tab from the bracket.
Disconnect the PCV fresh air tube from the left camshaft cover.
Remove the PCV fresh air tube from the throttle body.
Remove the drive belt. Refer to Drive Belt Replacement .
Remove the power steering pump retaining bolt.
With the hoses still attached, Carefully position aside the power steering pump.
Remove the retaining clip securing the PCV dirty air tube.
Disconnect the PCV dirty air tube from the PCV orificed tube.
Remove the PCV dirty air tube from the intake manifold.

The PCV ( Positive Crankcase Ventilator ) valve is located in a valve cover. It is identifiable by the largish hose ( usually about 1/2 - 3/4 inch diameter )going from it to the intake system. If you have a throttle body injection system, the PCV hose will go to the throttle body. Typically PCVs are on the passenger side of the motor.

The blowby vapors that end up in an engine's crankcase contain moisture as well as combustion byproducts and unburned fuel vapors. The crankcase is sealed to prevent the escape of these gases into the atmosphere, but the vapors must be removed to prevent oil contamination that leads to sludge formation. The positive crankcase ventilation (PCV) system siphons these vapors from the crankcase and routes them into the intake manifold so they can be reburned in the engine.

The main component in the PCV system is the PCV valve, which is usually located in the valve cover. A hose connects the PCV valve to the intake manifold. A second hose between the air cleaner and crankcase or other valve cover (V6 or V8 applications) provides fresh air to help flush the vapors out of the crankcase. Some engines have a separate air filter for the PCV breather hose located inside the air cleaner.
Probably not read above for details.

Usually you grasp it an pull it out.

Positive Crankcase Ventilation (PCV) Valve Removal & Installation To Remove:
PCV Valve location (3.3L & 3.8L engines shown, 2.4L similar)

1. Disconnect the vacuum hose from the positive crankcase ventilation (PVC) valve.
2. Remove the positive crankcase ventilation valve from the valve cover.

To Install:

1. Install the positive crankcase ventilation valve in the valve cover.
2. Connect the vacuum hose to the positive crankcase ventilation valve.

what engine

4.6L engine




Item Part Number Description 1 6C324 Crankcase vent connector and hose 2 6A666 Positive crankcase ventilation valve

The term PCV means positive crankcase ventilation valve and it should be sticking in the valve cover with a vacuum hose attached to it. Hope this helped and best wishes.

I think it is in the valve cover. see illustrations from shop manual.



Positive Crankcase Ventilation System Overview The Positive Crankcase Ventilation (PCV) System (Figure 132)cycles crankcase gases back through the engine where they are burned. The PCV valve regulates the amount of ventilating air and blow-by gas to the intake manifold and prevents backfire from traveling into the crankcase. The PCV valve should be mounted in a vertical position. On some applications, the PCV system is connected to the evaporative emission system (refer to the VECI decal). located on the underside of the hood or on the radiator cooling fan shroud.

crankcase ventilation tube

1. Remove the positive crankcase vent (PCV) hose from the clips.

A bit of splash is normal from the slight backpressure created when the pistons go down in any engine, but might also be due to clogged PCV valve. Put the cap back on and pull the dipstick and see if you hear constant hsssssss from there, or if the oil splashing abates from the Fill hole.

As a rule, you are not supposed to open that with the engine running ;-) Very messy on a nice Volvo

My money is on the PCV valve (Positive Crankcase Ventilator ($3.00-20.00)