How to Replace the PCV Valve in Cars

by Contributing Writer; Updated June 12, 2017

The combustion process burns off these gasses. Engines that are old, brand new (not yet broken in) or damaged allow an excessive amount of blow-by gasses past the rings and into the crankcase. Engine vacuum and PCV spring pressure work together to regulate the amount of fresh air from the breather that is allowed to circulate through the crankcase. Dirty or fouled PCV valves cause the blow-by gasses to pressurize the crankcase and lead to oil leaks and an oil-soaked breather filter.

Under The Hood:

 How to Replace the PCV Valve in a Jeep Grand Cherokee

Locate the PCV valve on the Jeep Grand Cherokee. You'll find the PCV valve on top of the engine with a small hose connected to it. The part is located directly on the oil filler tube.

Disconnect the hose of the PCV valve in order to remove the part. Then, turn the PCV valve counter clockwise until you have freed it from the cam lock. Finish removal by pulling the valve away from the engine.

Test whether the PCV valve works properly. Shake the part and listen for a rattling sound. If you don't hear a rattle, then you need to make the replacement on your Grand Cherokee.

Purchase the new PCV valve for your Jeep Grand Cherokee. You can find a good price on the Grand Cherokee PCV valve at Car Parts Wholesale. You'll find the standard replacement for six-cylinder and V8 engines manufactured between 1993 and 1998.

Find the tabs on the PCV valve. Place the tabs into the cam lock of the Jeep Grand Cherokee. Push the rest of the valve into the opening and then reconnect the hose to finish the job.

 How to Change a PCV Valve on a Chevy Impala

Locate the Impala's PCV valve. Pull the connecting hose off the end of the valve. It should pull straight off. On some model years, you may need to remove a retaining ring using a pair of pliers to work the ring off the end of the hose and then pull the hose off the valve.

Turn the PCV valve counterclockwise as though you were unscrewing a light bulb. The valve will come out of the engine relatively easy this way.

Install the new PCV valve as though your were screwing in a new light bulb. Tighten the valve until you feel resistance against the engine. Do not over-tighten the PCV valve.

Reconnect the PCV valve hose and replace the retaining ring if your Impala has one.

Items you will need

  • Pliers

  • Clean rag

 How to Replace the PCV Valve in a Lincoln Town Car

How to Replace the PCV Valve in a Lincoln Town Car

Locate the PCV valve of your Lincoln Town Car on the top of the intake manifold under your air cleaner. The end of the PCV valve plugs into the top of the intake manifold and has two vacuum hoses attached to it.

Carefully disconnect the two vacuum hoses that are attached to the PCV valve to prevent the plastic outlet valves from breaking off. Remember which hose attaches to each outlet valve so you can reattach the hoses correctly on the new valve.

Unplug the PCV valve from the intake manifold by pulling it straight out of the manifold. Check the valve port to verify that there are no broken pieces left behind.

Plug the new PCV valve in to the intake manifold valve port until you hear the PCV valve click into place. Verify that it is seated properly in the manifold.

Reconnect the vacuum hoses to the PCV valve outlet ports and check the vacuum hoses to verify that there are no holes or leaks in them.

 How to Replace a PCV Valve on a Buick 3800

L36 Engine

Unscrew the oil filler neck from the engine shield by hand. Raise the front edge of the shield by hand and pull it forward and off of the engine.

Locate the manifold absolute pressure (MAP) sensor on the front end of the intake manifold. Spread the MAP sensor retainers slightly and pull the sensor from the PCV cap by hand.

Push the PCV cap down and rotate it 1/4 turn counterclockwise with a 16-mm socket. Lift the PCV cap off and pull the PCV valve and O-ring out of the manifold by hand.

Place the new O-ring on the new PCV valve. Insert the new valve into the intake manifold.

Position the PCV cap over the valve. Push it down and rotate 1/4 turn clockwise to engage the cap to the manifold.

Push the MAP sensor into the PCV cap until the retainers snap into place.

Place the rear of the engine shield in position against the shield bracket. Lay the front of the shield onto the engine.

Align the engine oil filler hole. Screw in the oil filler neck by hand.

L67 Engine

Remove the engine shield retainer nut from the center of the shield with a ratchet and socket. Unscrew the oil filler neck by hand. Raise the front edge of the shield up and pull it forward and off of the engine.

Push down on the PCV cover. Remove the two cover retainer screws with a wrench. Slowly release the spring-loaded cap. Pull the PCV valve, spring and O-ring from the housing.

Install the new O-ring onto the new PCV valve. Insert the PCV valve and spring into the housing. Push the cap down over the valve and spring and install the retainer screws. Torque them to 89 inch-pounds with a 1/4-inch torque wrench and socket.

Position the rear of the engine shield against the shield bracket. Lay the front of the shield down. Align the oil filler holes and install the filler neck by hand.

Install and torque the engine shield nut to 18 inch-pounds-with a 1/4 inch torque wrench.

Items you will need

  • 16-mm socket

  • Ratchet

  • New PCV valve

  • New O-ring

  • 1/4-inch torque wrench

 How to Replace the PCV Valve in a Toyota Camry

Determine the location of the PCV valve on your Toyota Camry. You will find it on top of the valve cover of your engine. You can find it by following the hose attached to it from the manifold of your car.

Remove it from the valve cover by detaching the hose and pulling it out of the opening that houses it.

Clean and test the PCV valve before making a replacement. Spray the valve with a carb cleaner before inspecting it for clogs. To test if it works, blow air through it to see if it flows through. If the air stays within the valve, the part is still operational.

Pick up a new PCV valve for your Toyota Camry. Since it's a common part, you can go to any local auto parts store to buy it. To order online, go through Car Parts Wholesale. They carry parts for Camry model years 1983 to 2001.

Connect the new PCV valve to the cover by pushing it into the opening. Reconnect the hose and start your car to check if this installation solved your problem.

 How to Replace the PCV Valve in a Northstar

Take the bolts off the cover on the top of the Northstar engine with a socket wrench to gain access to the intake manifold cover. Locate the PCV valve on the top of the intake manifold cover with a rubber emissions hose attached to the valve.

Pull the rubber emissions hose off the PCV valve carefully and set the hose aside. Unfasten the PCV valve from the intake manifold by hand.

Place the new PCV valve in the top of the intake manifold cover the same way the old one came out. Attach the rubber emissions hose to the new PCV valve.

Secure the Northstar engine cover to the top of the motor with the bolts.

Items you will need

  • Socket wrench set

 How to Replace the PCV Valve in a Hyundai Sonata

Locate the PCV valve. You can find the Sonata's PCV valve next to the engine on top of the intake. You'll see a hose connected to the valve. The valve noticeably sticks out from the side of the intake.

Determine whether you need to replace your Hyundai Sonata's PCV valve. Test the valve out by blowing air through it and making sure the air does not get trapped but moves through the valve.

Order the PCV valve replacement from Rock Auto Catalog online. You'll find the original equipment replacement for Sonata car models made from 1989 to 2003. This includes both four- and six-cylinder models.

Remove the PCV valve from underneath the cover with a wrench. Disconnect the hose from the PCV valve and discard the broken valve.

Tighten the new PCV valve with the wrench. Once you have tightened the part, you can reconnect the hose. If the hose needs replacement, you can make the repair prior to finishing installation.

 How to Replace the PCV Valve in a Hyundai Santa Fe

Locate the PCV valve on the Hyundai Santa Fe. You'll find the Santa Fe PCV valve on the back of the valve cover with a hose attaching it to the intake manifold.

Start your car and allow it to idle. Remove the PCV valve by pulling it away from the valve cover. Test the PCV valve while it's still attached to the hose by feeling for the vacuum at the bottom of the part as well as shaking it and listening for a rattling sound. If you find both these items, you don't need to go further with the replacement.

Order the PCV valve for your Hyundai Santa Fe if you find that it doesn't pass your troubleshooting. You can find the PCV valve for your 2001 to 2007 Hyundai Santa Fe on Auto Parts Warehouse. This part fits all engine types.

Discard the old PCV valve. Locate the opening on the valve cover that houses the PCV valve and position the longer end of the valve inside of it. The shorter end will is reattached to the hose.

 How to Replace a PCV Valve on a Mercury Marquis

Locate the PCV valve at the top of the motor. It will be located on the valve cover and is connected to a long rubber hose that runs to the air cleaner.

Disconnect the hose running to the air cleaner from the PCV valve. The hose should pull straight off with little resistance. Check the condition of the hose and verify that it is not cracked or clogged with buildup. If the hose is damaged or full of debris, it should be replaced.

Pull the PCV valve from the grommet on the valve cover. Pull straight up on the PCV valve while twisting it, if necessary, to encourage it to break free.

Push the new PCV valve directly onto the grommet. Be sure the valve is fully seated and locked into position. Reattach the air cleaner hose to the open end of the PCV valve. The hose will just slide on the valve.

 How to Replace the PCV Valve in a Toyota Tundra

Test out your Toyota Tundra PCV valve prior to deciding to make the replacement. You'll find your Tundra's PCV valve on the cylinder head cover. Blow through the tubing to make sure air flows freely.

Purchase a PCV valve for your Toyota Tundra. You can purchase the standard PCV valve for Tundra models manufactured after 2000 on Auto Parts Warehouse.

Remove the PCV valve in order to make the replacement. First pull upwards and then separate the PCV valve from the attached vacuum hose.

Discard the old PCV valve. Take the new one and attach it to the vacuum hose. You're going to position the smaller end of the valve into the open end of the hose.

Locate the open grommet in the cylinder head cover of the Toyota Tundra. Press the other end of the PCV valve into the grommet in order to finish the replacement.

 How to Replace a PCV Valve in a 2002 Dodge 1500

Find the PCV valve -- the L-shaped plastic valve --connected to the oil filler tube, just below the oil filler cap.

Pull the rubber vacuum hose from the PCV valve with a slight twisting motion.

Twist the PCV valve about a half-turn counterclockwise and pull the PCV valve from the oil filler tube.

Line the tabs on the PCV valve up with the notches in the oil filler tube. Insert a new PCV valve into the oil filler tube and twist it clockwise to lock it into place.

Press the rubber vacuum hose onto the PCV valve.

 How to Replace the PCV Valve in a VW Jetta

Find the PCV valve on the rocker arm cover of your Volkswagen Jetta. You'll find it at the end of the cover with a hose attached to it.

Remove the PCV valve from the cover in order to test whether it needs replacement. Remove it by pulling it away from the grommet.

Test the PCV valve before you remove the hose. To do this, leave the engine of your Jetta idling. Feel the end of the valve to check for the manifold vacuum. Also, shake the valve and listen for a rattling sound. If the PCV valve doesn't have a vacuum or makes a rattling sound, you'll need to make the replacement.

Slide the new PCV valve into the grommet of the former PCV valve. Once you have firmly pushed it into place, you can reattach the hose to finish the installation.

 How to Change a PCV Valve in a Honda Civic

Locate the PCV valve. It is in the middle of the valve cover in the rear. There is a small vacuum line that connects it to the intake manifold.

Use the pliers to squeeze the clamp and slide it back on the vacuum line.

Slide the vacuum line off the PCV valve.

Grab the PCV valve and twist it while pulling it out.

Install the new PCV valve by pushing it into the rubber grommet.

Slide the vacuum line onto the PCV valve.

Squeeze the clamp with the pliers and slide it back into place on the PCV valve.

Items you will need

  • Pliers

  • Replacement PCV valve

 How to Replace the PCV Valve in a Subaru Outback

Open the hood of your car in order to find the PCV valve on your Subaru Outback. You'll find the valve on the valve cover next to the engine. To identify the PCV valve, look for a small hose attached to it and connecting to the intake manifold.

Spin the PCV valve counter clockwise in order to remove it from the valve cover of your Subaru Outback. Once disengaged, you can detach the connecting hose as well.

Take a minute to check the status of the old PCV valve. Look for any clogs and shake it, listening for a rattling sound. If the valve fails these tests, you'll need to make the replacement.

Order an OES PCV valve replacement for your Subaru Outback from Car Stuff. The site has the part for 2001 to 2007 models with 2.5L engines.

Turn the new PCV valve clockwise until it fits firmly in place on the valve cover. You're going to put the ridged end into the opening while attaching the other end to the hose.

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