Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. How to Replace a PCV Valve Hose

How to Replace a PCV Valve Hose

PCV valve hose outlined in yellow

The Positive Crankcase Ventilation (PCV) valve hose is a hose running from the valve cover on the engine to either the intake air box or the intake manifold. The PCV valve is activated when crankcase pressure rises in the engine when running. These gases raise emissions, so to reduce the emissions the PCV valve routes these excess gases through the PCV valve hose to the intake airbox or intake manifold. The engine reburns these gases, which reduces emissions and keeps the engine running cleaner. A PCV valve hose failure can cause poor fuel economy, a Check Engine Light to come on, and can cause the engine to run rough.

Part 1 of 1: Replacing the PCV valve hose

Materials Needed

location of pcv valve

Step 1: Locate the PCV valve. The PCV valve is located on a valve cover, which is in various locations on the valve cover depending on the make.

The image above shows a PCV valve (1) and the PCV valve hose (2).

an engine cover

Step 2: Remove the engine covers. If there is a engine cover in the way of the PCV valve hose, you will need to remove it.

It will either be retained by nuts and bolts or just snapped into place with rubber insulators.

Step 3: Locate and remove the PCV hose. Once you locate the PCV valve, you will see how the PCV valve hose is attached to the PCV valve and the intake.

Your vehicle may use quick disconnectors, spring hose clamps, or gear type hose clamps.

gear type of hose clamp

Gear type hose clamps are removed by using a ¼ inch or 5/16 inch socket to loosen the hose clamp and slide it from the hose ends.

spring type of hose clamp

Spring hose clamps are removed by using a pair of pliers to collapse and slide the clamp away from the hose end.

disconnect type clamp

Quick disconnectors are removed by releasing and slightly pulling to remove. This requires first examining how the quick disconnect works.

Once you have identified and removed the connector, remove the PCV valve hose by gently twisting and pulling the hose away from the fitting.

Step 4: Install the new PCV valve hose. Position the clamp on the PCV valve hose. The hose will typically slip right over the fitting when installing.

If needed, you can apply a very thin layer of grease to help slip it over the PCV valve or the intake fitting.

Step 5: Clamp the PCV valve hose. Clamp the hose by using either the clamps provided or the old clamps.

Step 6: Secure the clamps. Make sure to secure the hose ends with the type of clamps it is designed to use.

Step 7: Replace any removed covers. Reinstall any engine covers or plastic covers that were removed.

Keeping your vehicle’s PCV valve hose in good working order will help the engine run cleaner and more efficiently. If replacing your PCV valve hose is something you would rather leave to a professional, have one of YourMechanic’s certified technicians perform the replacement.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

How to Find the Keyless Code on a Ford Explorer or Mercury Mountaineer
Many Ford Explorers and Mercury Mountaineers were manufactured with an option known as the Ford keyless entry keypad. Some models refer to it as SecuriCode as well. It...
P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem...
Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...

Related questions

Q: How to stop oil burning on a 2002 Toyota Corolla

The first thing you'd want to do is change the PCV valve - the positive crankcase ventilation valve. They don't cost that much. Pray that it's that. If it is, then that means that it is sticking open, and...

Q: Hesitation while staring a 2000 Honda Civic

First thing you want to do on a Civic is check the valve lash. Check the adjustment for the mechanically adjustable valves. If the valves are off adjustment on Hondas they will do exactly what you are describing. The...

Q: Does this car have a PCV valve?

All cars that have internal combustion engines have Positive Crankcase Ventilation (PCV) valves. On your car, the PCV valve is at the top of the engine in the valve cover. It is pressed into a rubber grommet. You will see...