How to Replace PCV Valve and Hose 02-09 Mazda 6 

√ *Watch the Video* √ *Buy The Part at 1A Auto* 1aau.to/m/Visit-1AAuto √ *Do it Yourself* √ *Save Money*

I just did this. After disconnecting the throttle body just move it out of the way doesn't need disconnecting. Also when bolting it start with 2 on top and then the difficult one in the front that way in case you drop it you can take the intake manifold off to get it out. Also don't tighten the first two bolts I said all the way so you can see from the top when bolting the porthold bolt goes in correctly. Like other person commented use tape to tape the bolt to the ratchet socket.

the designer of this engine should be sent to jail

I just got done doing this . Piece of cake . But i been working on cars for.over 20.years . . My advice is buy the injector repair kit. Basically the o rings for the injectors. As the more then likely will be broken or in bad shape. After you put it all back.together the injectors will leak gasoline. So buy the injector repair kit for ( $11 Ebay) Bucks and just use the orings. Dont have to use the other parts. also the PCV valve hose you are going to replace , wrap that Hose with CERTOPLAS 525e HIGH HEAT TAPE ($9 Ebay) So that the Hose will not rip again . Also tape the 10mm socket to the extention so you dont drop the 10mm as you will for sure do other wise. If you dont work on cars often , Better stay away from this job. Great video thank you !! And good luck to all . It fixed the BAD IDLE AND THE ENGINE SHUTTING AND CUTTING OFF . CAR IDDLES SMOOTH NOW. Also use a LITTLE of dish washing Liquid/soap on the injector O rings so that they go in easy . REMOVE THE BOTTOM SCREW THE ONE UNDER THE CAR FIRST BEFORE YOU DO THE ONES ON THE TOP . AND LEAVE THE FRONT OF THE CAR ON FRONT RAMPS THE ENTIRE TIME SO THAT YOU NOT BENDING OVER TOO MUCH WHEN WORKING ONTOP . . Make sure you Take deep breath as this can be a bit frustrating . Have a few beers near by . A chair to sit and relax your back and some smooth jazz to relax. Lol . Thanks .

Thank you 1A Auto and Sue!! My wife's 2006 Ford Focus wagon was throwing random P0171 "lean bank" codes and then it started stalling at idle. I followed the instructions in this video, the manifold gasket video, and one from Craig's DIY Car and found a 1.5 inch crack in the PCV hose. - Don't drain the coolant unless you need to replace the coolant hose that runs past the PCV hose. - You can get the bottom bolt on the manifold without lifting the car. - The Focus manual says remove the fans and shroud. I didn't. But I did unbolt the fuel rail and pop the injectors and move the rail to get better access to the clip on the PCV hose. I was able to leave the fuel line connected. - I found a rare-earth magnet that fit in my 10mm socket. No more dropped bolts. - You need the extra long angled needle-nose that Sue uses like a surgeon's forceps. - Where Sue just presses on the electrical connector for the Intake Manifold Runner Control actuator, I had to use a right angle gasket pick at the top of the latch. - The PCV valve retainer ring cracks easily. Carefully pry up - and out - at the right locking tab with a thin tool.

this woman knows the Mazda6 very well, and has put many men I know to shame. I've learned so much from watching her videos, and I've been able to do everything myself on my 07 Mazda because of her. She explains everything very well and in detail, and the camera is very clear and gets good shots of what she's doing. Sure things can be done a little different than the way she is doing it, but she is showing you the proper way to do it, and then that leads to other ways of doing things. Sometimes not doing it the proper way will work for some but not for others, so when you learn the proper way of doing things, you can branch off by doing it another way.

Just wanted to say that videos like this make complicated repairs for us cheapie wannabe mechanics easy. Thanks so much for posting!

It's a tribute to Mazda that they've made it so quick and easy to service the PCV system. Well done lads.

Did a PCV valve, hose, intake and throttle body gaskets on a 2008 Mazda3 with the L3-VE 2.3L engine using this video as reference. Trickiest parts were removing the PCV valve from the plastic retaining piece without breaking it (used a small pocket knife), and getting the blind center intake bolt started (wedged cardboard in socket with bolt). I didn't remove the emission tube and was able to wriggle the intake up and out without issue. Didn't drain coolant and didn't lose much on the floor. Great video, couldn't have asked for a better preview of the job!

I could not get that little round black pcv valve cover off my 2002 Ford Ranger 2.3L. In frustration was ready to break it off, instead said a prayer and found this wonderful video. Starting at the 19 min mark it shows using a screwdriver to pry it off. Thanks a bunch!

I will never change the pvc valve too much stuff to take off...great video...you are an expert mechanic!!!

This lady is brilliant!, difficult job (i would find it impossible to remember how to put things back 🙂) brilliant video! 10/10

Just finished doing this today on a 2006 Mazda 3 GT. Once I removed all 8 bolts, I was able to pull the intake manifold to give 4inches of space. This gave me just enough room to remove the PCV valve off and put a new hose in. Would it have been nicer to have the extra space to take it out and replace. Yes, yes it would. However, I did not want to remove all those harnesses and having to put them back as well did not seem appealing to me. It just increases the chance for error. You also don't need to drain the coolant. You can just remove the throttle body bolts and leave it connected to the coolant lines. If you want to clean the throttle body and don't want to drain the coolant. I left the car to cool down for a while. So when I took the lines out I didn't have any coolant left inside. Also, a tip for the most head banging, stupid, idiotic design placement for a bolt for the intake manifold (center one). Have those little magnet on the extendable sticks so you can place it in the hole and turn it just enough to thread it so you can take the magnet out and leave the bolt in. Made it so much easier and less of a mess! Have fun guys! Remember, patience is immensely required. T-T

What a great video. Thanks! I have a Mazda 5 2007 (European spec) and I was able to follow this with only minor differences between the models. I wont say the job was easy, but it was only really possible due to this excellent vid. I would not have attempted it if I had not come across it. Thanks again.

Best of the MAZDA PCV videos I’ve seen so far.

You are my favorite mechanic. Anytime I see a video from you I know it's going to be just what I need to do my project. My girlfriend was inspired by your mechanic skills and decided to help with the process of intake removal and reinstallation. Thanks a lot for another great video!!

You've done a great job here ... convincing me to leave the old PCV in and live with the consequences! One unused $6 part I will not use. Shame on Mazda for making simple servicing tasks so monumentally difficult and labor-intensive. Likewise for the alternator brushes; that $16 part has been sitting new in my glove box for 5 years since I bought the car used. The car will eventually break down far from home as a consequence.

Really wanted to thank you for putting this together. This helped tremendously in replacing my knock sensor. I only wish I had seen this about 10 years ago when I had to figure everything out myself when the PCV when out. I played it safe this time and replaced the PCV and knock sensor during this go around. Just a comment to anyone that has a Mazda 6i 2003 Automatic 2.3L. The oil dipstick is attached to the intake manifold, and surprising enough the lower nut to this is the hardest part in the beginning. Do this as your very first step right after the coolant drain. Other than that follow this awesome instructional video as shown. This is not the only video that 1A Auto Parts has put out that I have used. Keep up the good work!

This video saved me so much time in removal/install. Thank you.

Just completed PCV/ hose & Knock Sensor, took my time 2010 mazda-6...did not drain coolant, remove injectors or jack up car! Instant improvement in MPG & cat not at threshold code gone...winter will tell! Many thanks for the video

Thank you for another great video. You make me feel good when I see you struggle with things from time to time. You do real life videos and take your time with your step by step explanations. I am glad I found this channel and have made purchases from A1 Auto. Quality parts and reasonable prices with fast delivery.

Thanks for the video, I just replaced the PCV valve in my 2008 Mazda 6 and it went great!!

It's really one of the best repair video ever seen ..but for honest it's scary to do on my Mazda 6 2007 .

It would almost be worth buying the new hose even if yours isn't in bad shape just for the brilliant clamp tabs to easily seat it when struggling with the manifold going back in lol. Great job Sue and to the person at mazda who put the knock sensor and pcv valve down there we all hate you 😅

Thank you for posting this and showing me how to do the job like a pro. Now I can tackle this job and refer back to you . Superb video.

To my understanding, you should never open the throttle's butterfly manually if it's connected to power. Disconnected from the power you should be careful but it should be fine, this way you can clean it properly. I do have a Bachelors's degree in Automotive Technology but I don't have the experience this lady has. That being said, I have properly cleaned the Electronic throttle body in my 2010 Mazda 3 2.0i and it has been 5 plus years later and working fine. This service corrected a code for Idle Air Control - RPM Lower than Expected. I have also done the same service to a 2014 Mazda 3 2.5 and it still running great. My respects to the professional lady, this is a topic I would love to examine further.

1AAuto videos are always very well done. Thank you so much.

this is how you make a professional video, well done

Outstanding video on removing it all up to the PCV valve. Detailed on how to remove the plastic retainer clip also. Thank you I will be using your video as my tutorial. I’m getting ready to do the job on my 2007 Escape.

I am sorry but the whole purpose of cleaning the valve body is to clean the gunk between the butterfly (drosselklappe) and throttle body to allow a little gap. That gap is important for the proper air/fuel mixture. You can clean the body all day long but if you don't open the butterfly and clean the walls you did not do anything. No idea how exactly the [rocesses will affect performance afterward...The battery is disconnected so the ECU will relearn and adjust the throttle. Also, it is a must to replace fuel injector O-rings when removing the injectors, just like the intake and throttle body gaskets. They may seem fine but they are cheap and if they have been there for the life of the car chances are you will run into problems later.

Exelente, muy bien organizado, limpio y muy buena la explicación de los pasos qué se deben seguir con el cuidado que las piezas se merecen y algo muy importante que son los torques de cada tornillo y algo que me gustó también que no tiras las piezas sino todo con calma y cuidado, bravo felicitaciones . Seguiré contigo un abrazo.🔧🔩⚙️😎

Hola, busqué mucho un vídeo donde hagan este procedimiento y al fin lo encontré!! La PCV está muy escondida.. Mejor se lo llevo un Mecanico.. Gracias por compartir!!

Great job sweetheart, keep up the grade A quality work and teaching us how to do it right

Me ayudo mucho, mi mazda Cx7 se oía como que chupaba aire y estaba muy temblorosa, estaba rota esa pieza, min 18:53 válvula PCV, muchas gracias eres una Master.

I don't think there could be a better video of this procedure... I do have a question. Did you relieve the fuel pressure before breaking open the fuel rail?

Thank you so much for this video! I couldn’t have done my 07 fusion without this step by step video!!!!!!

all this for a pcv valve?! ill just put tape over my check engine light!

For the plastic ring holding the PCV valve down. If you take a pair of pliers and rotate the ring a little, it will pop right off. The little tabs move off to the side so they are not in the holes anymore. Much less likely to crack it.

who can dislike a video like this

Props to the tech👍🏼after just watching a 5 min video. on how and why to replace a pcv valve on a 5.3 vortec, an going out and accessing on my own truck within two seconds. Mazda is tripping😂

I was wondering isn't there some way you could get to the PCV valve and the PCV attached hose from underneath the car? It seems like you have to remove a lot of things doing it from the top.

Thanks for a great instructional video. I was curious if it might be possible to replace PCV valve from the bottom without removing the intake manifold? Perhaps one can remove the radiator and fan assembly to gain more room to work on the valve?

Is it absolutely necessary to drain the anti freeze?

Need to replace my PCV valve and my thermostat. Will removing the intake give me access to the thermostat too?

Can I have the part numbers for the PCV hose, intake gaskets, and the throttle body gasket. I have same engine on my 2012 CX-7 sport and I couldn't find anything match on the 1Aauto website.

Very good detailed (to a point) video, BUT....... part numbers to purchase parts would have made this video perfect for anyone doing this (as I will be) to save time.

This is only for the v4 model. If you have a v6 the repair is significantly easier.

Great vid. Would like to know why you needed to change the PCV or knew there was a problem with it!. Not that i would attempt changing one after watching that. Think mazda thought of a PCV valve and built engine around it. Thanks

Did you replace the gaskets?

Big like madam and don't stop, keep going with videos 👍🏻💪🏼

Hi. Is there a way to tell that your PCV valve is not functioning properly without disassembling everything like on the video, given that it actually consumes oil (not that much but still) and you can see the oil INSIDE the intake manifold (just saw it when I took off the throttle body)? Thank you so much for the video!

now I understand why there is no vehicle theft like Mazda at least in my country to get and sell parts and units of this vehicle. The engineers who made this engine and its design should go to jail, often a problem disassembling parts to get to a tiny sensor.

Wow, the same job on the Toyota Sienna is very simple and took less than 10 minutes.

I'll never complain about removing the inlet manifold on my Ford Focus ST ever again, so much easier than that Mazda 6.

Thanks tackling this tomorrow .your video really helps me get a full understanding! Appriciate it !

Mazda Xedos 6 V6 , PCV Valve change- 1 Minute. 😀

Would this be the same steps for a mazda 3 2010?

Thank you for the vid. I won't be doing this one lol

Usually PCV valves are not as complicated

Is that the same procedure for a 2015 Mazda CX-5 ?

Would this be applicable to a 2004 Mazda 3 2.0L as well or are there too many differences?

Wow, just to get to the PCV!

SUE IS MY FAVORITE! BUT HOLY COW DOES THIS LOOK COMPLICATED! 😬

When the job was totally complete and the engine was restarted, did this initiate any fault codes and did you have to clear them or did they clear after driving the car for a period of time. In real time what time should be allocated for this job 90 minutes , 2 hoiurs, ?. Thanks John

@1AAuto , is there a part # for the O-Ring that goes onto the PCV Valve? Mine snapped in half.

Great teacher! Thank you

I’m gunna do this next week 👌 07 Mazda 3

I'd rather buy a hyundai just for the pcv valve... it's on top part of the engine... no sweat to replace.

I can't believe a maintenance part that suppose to be replaced every 50000 kms is so complicated to install...almost to take apart the whole vehicle to change that little valve...

Great video! Thanks a lot! You know or does anybody know the inner diameters of the PCV hose?

Good Video! 1A Auto always has great videos

Thank you for this video I may use it for my fusion 2.3

Love Sue. Is she a tech, or an actor? Looks like a tech. Would love to talk to her about her future. Jim Eve's Automotive

As helpful as it is, she did not clean around the injector and or intake area before removal, as you can clearly see, there is a large amount of debris in the injector holes as which some has surely entered. But thank you for the video.

Thanks!

A lot of unnecessary removal going on here. I’m doing this job on a Mercury mariner and I left the rail on the engine, I didn’t pull the airbox and I did pull the cooling fans, and the job went very well. Torque spec is 156 in/lbs. it’s best to use the 1/4 drive inch pound torque wrench and go from center outward moving from top to bottom.

What wrench are you using at 7:08? It's not listed in your tool links in the description

Hi there thanks for the video,,, how much is that cost to change out pcv

Your eyes 👀 are priceless, protect them ....

I start my mazda 6 2004 but not start but I just see smoke on the intake manifold but I don't know what to do

Hi So I have the same model and disconnected everything properly shown, now my car is idling extremely rough what could be the cause

Does this repair apply to the Ford Fusion 2006-2009?

Is the same valve on the mazda 6 1.8 petrol engine? Thanks.

Is the engine the same as the 2.3 in the 2008 Mazda 3?

How long did it take you to do the whole thing ?

Where can I buy that cap where you took off on the pvc value you said “be careful not to break it “ little black cap . Putting it back on it broke . Thank you 🥲

Is this the same procedure for a 2012 mazda 6?

Es buena tiene mucha paciencia es la clave de hacer este tipo de trabajó 👌🏻👏👏

Thanks for the video. But as a non mechanic. This is where I draw the line on thigs I would and wouldn't do on my own.

Can anyone tell me what the special type of ratchet she uses at 7:05 is? I would love to buy one, but don't know what it's called

It is necessary to drain the coolant fluid only to remove the small hoses connected to the throttle body ?. Are there other hoses from the cooling system not shown in the video?

I guess thats some mechanics that put the thumbs down on this video videos like this might run them out of business😂 only reason i could think of someone putting a thumbs down🤔🤷😂

How much does this Cost Please ?? Labor & Parts ??

This Work make in what time? 2 or 3 hours?

Dobry den mám Mazdu 6 a občas za jízdy cukne už nevím co stim jsou tam výměnene svíčky filtr v nádrži i čerpadlo ,map senzor

Hi, thanks for videos. They are helping me a lot. Do you ship parts to Australia?

What I've done is kept the original PCB valve, honed it out and put extention hoses and a new PCB valve where I can access it to save me the trouble of all that work again, also add a breathable oil cap on top or make your own.azda built a great engine but put that stupid valve so low next to the oil level. The moment a little oil pressure starts to build it starts to pump oil out I to you intake costing a fortune to fix, so you would sell it and buy another new one I guess according to Mazda🤦🏼‍♂️

I wonder if the CRC INTAKE VALVE CLEANER also cleans the PCV valve... does anyone know?

Hi. What schould i do for P2009 code. Thx.

I cant understand how or why design engineer of this model think that the PCV , its hose , the intake manifold gssket will not wear out and that there is no need to make a repair and hence the mechanic will not find difficukty in temkving those bolts. They coukd have design that a sufficient space is provided.