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How to Replace PCV Valve and Valve Cover Breather Tube 04-09 Audi A4

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  1. step : Removing the PCV Valve (0:34)
    • Pull off the engine cover
    • Remove the upper hose on the PCV valve by pinching the tabs and working it off of its lines
    • Pry the lower PCV valve clamp off
    • Remove the four T25 Torx screws from the valve
    • Pull out on the housing as you pull off the last bolt
    • Pull the housing up and out
    • Remove the old gasket from the slots on the side of the valve cover
  2. step : Removing the PCV Valve (1:53)
    • Insert the gasket into the PCV valve
    • Insert the bolt into the new housing
    • Lower the housing into place
    • Tighten the four T25 Torx screws
    • Snap the lower breather line back into place
    • Reinstall the upper PCV line until they snap
    • Replace the engine cover
  3. Make sure engine has cooled down before attempting repair

  4. step : Removing the Valve Cover Breather Tube (3:24)
    • Loosen the clamp at the top of the breather tube
    • Remove the breather line from the rubber hose
    • Remove the two 5mm screws holding the back of the tube
  5. step : Installing the Valve Cover Breather Tube (4:45)
    • Press the bottom bolt into the bracket
    • Line the tube up into place
    • Tighten the two 5mm Allen bolts
    • Torque the bolts to 80 inch-pounds
    • Press the top of the breather line into place
    • Tighten the hose clamp with a flat blade screwdriver

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Hi, I'm Mike from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.

In this video, we're going to show you how to replace the PCV valve and valve cover breather tube on this 2007 Audi A4. You'll need a T25 Torx driver, hooked pick, flat blade screwdriver, 5mm stubby Allen socket, a ratchet, and a universal joint.

Remove the engine cover. Locate the PCV on the rear driver side of the valve cover. Remove the upper hose on the PCV valve by pinching together the tabs, carefully working it off of its lines. Work the lower clamp off of the PCV valve. Make sure it's disconnected, you don't really have enough room to set it off to the side in any way.

Remove the four to T25 Torx screws with the T25 spit socket or screwdriver. Where it's difficult to reach down and hold the last screw with your finger, simply pull out on the housing as you unbolt it. Go up the housing, and make sure that the screw stays in there. Using a small pick remove the old gasket from the slots on the side of the valve cover. Install the new gasket into the valve cover.

Be sure that it's fully seated and lined up properly. You don't want any slack in there or any parts that aren't seated fully into the valve cover gasket or they could pinch and get locked in there crooked when we install the new PCV valve.

Bottom bolt here next to that lower breather line, going to go ahead and rest that in there. Carefully lower the PCV valve housing back into place. Line it up and tighten it down. Reinstall the remaining three screws. You may have to move this lower PCV line to get to the top right. Snap the lower breather line back into place.

Reinstall the upper PCV line until they snap into place. Reinstall your engine cover.

The valve cover breather tube is located on the front passenger side of the engine and runs from this rubber hose on the valve cover down to the inlet side of the turbo. Be sure that the engine is cooled down before removing the tube because it connects to the backside of the turbo, which gets very hot very quickly. Ensure the vehicle is fully cooled down.

Use a flat blade screwdriver to loosen the clamp at the top of the breather tube. Remove the breather line from the rubber hose. Remove the two 5mm Allen screws holding the bottom of the tube into the back of the turbo. You'll need a stubby Allen socket and a universal joint.

To remove the lower bolt, we're just going to use a long straight extension in the stubby Allen socket. All this oil inside the tube is a good sign that the check valve in this breather has gone bad. That means that all this oil is getting into our turbo and in turn into our motor.

Start the bolt through the bottom of the breather line, line up the bolt, start the top by hand. Once the bolts have been started and the flange is lined up tighten them down. While you need to use extensions and universal joints in order to remove and install these bolts they can throw off the accuracy of the torque spec, but if you'd like the torque spec for these is 80" lbs.

Reinstall the top of the breather line into the hose with the ventilation line reinstalled into the rubber hose. Tighten your clamp with a flat blade screwdriver.

Thanks for tuning in. We hope this video helped you out. Next time you need parts for your car, please visit 1AAuto.com. Also check out our other helpful how-to and diagnosis videos.

Tools needed for replacement:

    General Tools

  • Pick

  • Hex Wrenches

  • 5mm Hex Wrench

  • Ratchets & Related

  • Swivel
  • Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Star Drivers & Sockets

  • T25 Driver


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