Car Fix DIY Videos

Replacement parts for Saturn Vue 2004-2007:
OEM direct replacement PCV valve: https://amzn.to/2NeJCgh
Cheap After market replacement: https://amzn.to/2NXyB2p
Metric Wrench Set 8mm – 22mm: https://amzn.to/2xQn3ot
Socket Set 123pc Metric and Imperial – Good Quality: https://amzn.to/2NhqhL9

The car in the video is a Saturn Vue 2007. However, the procedures shown in the video will apply to most vehicles and applications.

You can use this knowledge on almost any automobile that ventilates the crankcase with PCV Value.

[MORE INFORMATION]
PCV Value (Positive Crankcase Ventilation Valve)

The positive crankcase ventilation or PCV valve is an inexpensive and often overlooked component. It is also one possible cause of expensive oil leaks and sludge buildup in an engine. All automotive engines are lubricated with oil and when oil is churned by moving parts, pressure is produced. This pressure needs to be released/ventilated through this valve and without blockage.

When an engine is run, it generates a good deal of heat. When the engine cools, condensation forms. Engine oil additives absorb this moisture and hold it in suspension. In time the moisture content exceeds the capacity of the additives. When this occurs, moisture attacks the metal parts of the engine causing damage.

[Symptoms of a bad PCV valve]
A plugged PCV valve causes many other engine problems. Pressure begins to build and gaskets and oil seals may fail. When an engine suffers multiple oil leaks, we should always inspect the PCV system. Another problem is a lack of air flow to carry vapors from the crankcase. Without air flow, moisture contamination remains and a sludge buildup is often a result. Operating the engine without adequate ventilation is a leading cause of engine sludge.

We see varied symptoms from a bad PCV valve, depending on the way it fails. For instance, a PCV valve that sticks open may cause a check engine light. The diagnostic trouble codes or DTC will normally not mention the PCV valve. Instead, the diagnostic trouble code P0171 and P0174 are common. These codes suggest a lean-condition in the engine. Other engines could set a mass-air-flow meter code or even an oxygen sensor code.

A failed PCV valve may also cause noise. Some will produce a whistle or whine and others can produce a low moaning noise. The easiest way to verify the problem is to temporarily block the vacuum source to the PCV valve and see if the noise changes or goes away.

[How to Test a PCV Valve?]
Common Misconception 1: Having the ability to blow through the PCV Valve in both directions does not mean the valve is bad. Is it not your typical everyday valve
Common Misconception 2: Shaking the PCV Value and hearing rattling is a good sign, but bad values can also exhibit this behavior depending on how the valve failed.

A simple RPM drop test well tell you if your PCV valve is working correctly on a variable control PCV valve.

With the motor fully warmed up. Hook up a good tach. Set RPM to factory spec. Take note of the RPM. Pull the PCV valve and plug the end with your finger. Note RPM again. If the PCV valve is functioning correctly the RPM should slow down a MINIMUM of 50 RPM. If it does not replace the PCV valve with a OEM one.

[Extra Info]
Aftermarket PCV Values are not recommended as the OEM parts are calibrated and control leak. The flow rate of a PCV valve is calibrated for a specific engine application. For the system to function normally, therefore, the PCV valve must adjust the flow rate as operating conditions change (The PCV value operates differently based on the intake vacuum, and the intake vacuum changes based on the engine load (acceleration etc))

Beware PCV valve hoses can also build up deposits on higher mileage motors. They should be replaced if they accumulate a lot of deposit as the inside diameter of the hose is also very important.

In general higher mileage motors will need to be replace more often because of increased blowby.

Video Title: How to Replace a PCV Valve – Part V384 (Saturn Vue 2004-2007)

Video File Created Date: Friday, September 13, 2019 (Video may or may not have been captured on this date, it shows the date the video was last converted.)

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