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How hard is it to replace the pcv valve on a mazda 6

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5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 155 Answers

SOURCE: i cant find where the pcv valve is on my 2003

The pcv valve is located behind the intake manifold, with some patience and small hands you can get to it.

Posted on Jun 09, 2009

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co7196
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SOURCE: 2004 Mazda MPV vacuum line from pcv valve and

You have the wrong type hose on the pcv valvle. It isn't vacuum hose.

Posted on Nov 12, 2009

Testimonial: "thank you you have been very helpful i understand now but the hose that is on the new pcv valve is a vacuum hose "

Boole5555
  • 160 Answers

SOURCE: how to replace 2004 mazda 6 pcv hose - v6 engine

Remove the hose from the PVC,
If the hose is stuck, try turning it in place with a set of pliers.
Sometimes a Flathead screwdriver can be used to pry it off, but can be dangerous and/or rip the end, of said hose.
However, if you are replacing it anyway, you could cut it off.
Remember to save a segment of hose for sizing.

Posted on Jan 05, 2010

s_mcrobert
  • 73 Answers

SOURCE: How to replace PCV Valve

Step 1: Identify PCV and remove connectors for space:
If you look at the back of the engine, there is a 5/8" tube running into the intake manifold. In picture #1, you'll see that this tube has a green sticker on it (red box #3). You can't see the PCV valve from this angle, but if you follow that tube down, you'll see a gray plastic piece. That is the PCV valve.



For step 1, we remove the 2 hoses and an electrical connectors (red boxes 1, 2, and 3). That will give us more clearance.



wol_error.gifThis image has been resized. Click this bar to view the full image.pcv_01.jpg



Step 2: Remove the tubes to get to the PCV valves.
Right, now you need to remove the 5/8" tube completely (the one with the green sticker). Picture #2 you can see that there are some hose-grips on that tubes, so using small pliers will help here.


wol_error.gifThis image has been resized. Click this bar to view the full image.pcv_02.jpg



After that, there is another adapter connected to that piece. Please see picture #3 and #4 for reference. That adapter must be remove because it spins freely. To remove, use your hand (no tools needed). Press the green adapter to release the grip and pull up.


wol_error.gifThis image has been resized. Click this bar to view the full image.pcv_03.jpg



wol_error.gifThis image has been resized. Click this bar to view the full image.pcv_04.jpg



Step 3: Remove PCV valve
You can see the full assembly in picture #3 and #4. Next is to remove the PCV valve. There is a shallow thread on that PCV valve, so you'll need to turn it to remove it. Use something to help you, like a clamp or pliers and rotate the PCV valve 1/4 turn counter-clockwise. This will be kind of difficult, but just keep working on it and it will loosen and pop out. A long reach nose-pliers can come in handy. In picture #5, you can see how tight it is down there.



wol_error.gifThis image has been resized. Click this bar to view the full image.pcv_05.jpg



Step 4: Replace and reconnect.
Replace the old PCV valve with the new one. Reconnect all the other hoses and connectors. Start engine and check for leaks. That's it.

hope this helps good luck!

Posted on Sep 07, 2011

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1 Answer

How much should it cost to replace PCV valve


Just clean it yourself,no need to replace

Google it's location

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Have you checked the hose from the valve cover to the air cleaner ?
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How to replace PCV Valve 2004 Mazda 6s V6 3L


Step 1: Identify PCV and remove connectors for space:
If you look at the back of the engine, there is a 5/8" tube running into the intake manifold. In picture #1, you'll see that this tube has a green sticker on it (red box #3). You can't see the PCV valve from this angle, but if you follow that tube down, you'll see a gray plastic piece. That is the PCV valve.



For step 1, we remove the 2 hoses and an electrical connectors (red boxes 1, 2, and 3). That will give us more clearance.



wol_error.gifThis image has been resized. Click this bar to view the full image.pcv_01.jpg



Step 2: Remove the tubes to get to the PCV valves.
Right, now you need to remove the 5/8" tube completely (the one with the green sticker). Picture #2 you can see that there are some hose-grips on that tubes, so using small pliers will help here.


wol_error.gifThis image has been resized. Click this bar to view the full image.pcv_02.jpg



After that, there is another adapter connected to that piece. Please see picture #3 and #4 for reference. That adapter must be remove because it spins freely. To remove, use your hand (no tools needed). Press the green adapter to release the grip and pull up.


wol_error.gifThis image has been resized. Click this bar to view the full image.pcv_03.jpg



wol_error.gifThis image has been resized. Click this bar to view the full image.pcv_04.jpg



Step 3: Remove PCV valve
You can see the full assembly in picture #3 and #4. Next is to remove the PCV valve. There is a shallow thread on that PCV valve, so you'll need to turn it to remove it. Use something to help you, like a clamp or pliers and rotate the PCV valve 1/4 turn counter-clockwise. This will be kind of difficult, but just keep working on it and it will loosen and pop out. A long reach nose-pliers can come in handy. In picture #5, you can see how tight it is down there.



wol_error.gifThis image has been resized. Click this bar to view the full image.pcv_05.jpg



Step 4: Replace and reconnect.
Replace the old PCV valve with the new one. Reconnect all the other hoses and connectors. Start engine and check for leaks. That's it.

hope this helps good luck!

Sep 06, 2011 | 2004 Mazda 6

1 Answer

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Check and double check then redouble check all hoses for cracks or leaks. Replace the PCV valve ( about $10)

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You have the wrong type hose on the pcv valvle. It isn't vacuum hose.

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