Is my BMW M54 M52tu M56 DISA Valve Ruining my fuel economy and robbing horsepower?
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- čas přidán 2. 07. 2024
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Is my BMW'S DISA Valve Ruining my fuel economy and robbing horsepower? In this video i demonstrate what to look for and how to remove and expect the disa valve from any M54 M56 or M52tu
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That end pin is actually held captive against the intake housing when in place so it can't come out in service. It can fall out when removing DISA valve and not be noticed and if left in there - then that is when trouble could start with it trying to get out via the exhaust pipe... Also the function of the DISA vale is to shorten and lengthen the intake runner to provide optimum low down torque (long runners) and optimum top end power (short runners)...
That is exactly what happened to mine! then i dropped the pin in the dark!!!
Hey you seem to know alot.. Can you give me input on the vvt solenoid on e46?
3:08 NOTE: Unless the frame around the flap is totally busted and falling into pieces that pin cannot fall out into the intake due to the design depth of the receiving hole, which would hold the pin into the frame and flap even if it comes loose as you see here. However, be sure to retrieve the pin from inside the intake if it happens to fall out upon removing the DISA valve.
Thanks to this video I inspected my DISA and sure enough that pin was about to fall out!! Thank you Nathan for saving my car from total annihilation!!! I just bought the repair kit!
Good job dude. Thanks for caring enough to take the time to help others. You saved me some money. F***ing love youtube.
thanks for the awesome videos. I bought my 01 540i/6 with 90K miles right after college as a weekend project with my father. At 120K, its running like a champ and continues to amaze me with each tutorial we attempt.
Awesome, check out todays video then to see the update on the e53 that has your 4.4l engine
ok thanks again for all your help. hard to find good information. you are saving people a lot of money on DIY videos.
Thank you so much for clear video, and excellent narrative.
Good man! Appreciate your work brother. Thanks
Another great instructional video.
Thanks Nathan.
Keep 'em coming.
+Antonio Di Cappo Thanks i appreciate it.
DISA valve O-ring alternate...Fel-Pro part# 35489 and Mahle part# C31302...Thermostat housing o-rings fit
perfectly snug with a little bit of grease added.
Nice Vid dude, taught me something today😎
THANK-YOU VERY MUCH MATE , STAY SAFE AND AWESOME !!
Very useful video thanks for sharing
Search on E-Bay: Silicone O-Ring-Dash 140, 10 Pk These O-Rings fit perfectly on the DISA and with a light smear of petroleum jelly, it pulled right into the intake. $2.97 for 10 O-Rings.
thanks a lot bud. you been a big help
Great video! Brilliant explanation
Definitely will be checking my DISA valve, very scared after seeing that loose pin. I'm having some low idle knocking sometimes and I have a "running to lean" error code. I remember reading something on the forums about the DISA valve possibly being the culprit. Thanks for the informative video!
No problem , better safe than sorry after yesterday's video!
Thanks for the video, I'll be checking mine out as soon as I get an O ring in hand
+edward gagnon No problem thanks for watching.
thanks will look into. some else told the same thing
good info bro.
Thank you, i’ll check mine
thanks I ll get it checked and get back to you. thanks a lot .
Just tested my DISA valve and replaced the O-ring based on your videos. Chipping out the old O-ring was a huge pain, but otherwise the job was easy. Thanks!
+hnkfsh81 I am glad it helped thanks for watching.
Good video very informative. My 03 5251 has codes 0941 and 0942 Bank 1 and 2 Lean
Can u do a video on how to replace a vacuum valve jet pump. Mine broke and i cant remove it.
Thank you.
Thank you !!!
Very helpful video. I did have a question a bit unrelated. Do you do oil changes without draining oil from drain plug and suck out of dipstick instead? Never heard of service places doing this until I brought my BMW Z4 in for oil change.
Glad I found this video - it was really helpful.
I am happy it helped, i also have a video up of how to install the rebuild kit
Indeed you have - which I also watched and found incredibly helpful. In a couple hours I'll be ordering a rebuild kit :-)
Good to hear and thanks for watching
thanks Nathan
Just removed my disa valve on M54. Hm the diaphragm hodls pressure good but the flap has fair amount of play. Today I've experienced a power loss after a stall. Unplugged and plugged back the connector on disa and power is restored. I'm considering to buy a repair kit online that has a aluminum flap and long screw and get rid of the problems with disa for eternity. And yes ther was none check engine light at all
Here's how mine robbed my horsepower.
The valve shaft got sucked up into an intake valve.
I have a 03 325i with 160k miles and I told my mechanic to check the disa valve just to see how far it’s worn out, he said it looks barley used still.
It is imposoble to lose pin inside intake without breakage of plastic, because that pin is very close to intake wall. Overtime that pin sticks on the wall of intake by the burning fuel or maybe burning oil deposits, thats why when you removing disa, pin is getting out. That plastic is very hard to brake, just now i changed the disa and try to break old one with hammer but it is not a hard plastic and does not breaks easy. Note that the e46 engines works at high temperatures approx from 95 to 105 degree, bmw makes this maybe for redusing emissions, but this high temperatures makes detonations. Strange thing is that Electrical Fan is programed to cool the engine when temp is up to 90 degree. But water pump pulley diameter is to big, rotation speed not enaugh to move hot coolant faster and pressure quickly raises, causes breakage of radiator plastics, this happens at low speeds with 1st gear and when we stop continually at neutral 700-800 rpm is not enaugh to move water pump faster. Even if termostat is stuck open and fan running without stoping, it helps little bit but not fully. High temps makes softer plastics to become brittle and with high pressure disa valve can break or melt easy especialy when internal combastion chamber valves are stucked and does not closes fully.
Nathan your videos have saved me thousands ...i was able to rebuild my whole M54 engine becouse of you and videos you made..
I have one question regarding disa.
Someone says that if you put key to position num 2 , plug your disa to connector and apply vacuum at the small hole by the flap and the flap should retract/close.
I applied this on my e39 and e53 and this doesnt happen ?
I also confirmed with other E39 and e53 owners and they're all saying that on position 2 our vehicles e39 and e53 do not get voltage for some reason but only e46 they do and they can test it this way what's your thought of that?
Are out vehicles not getting power there at all or is this normal?
There was red silicone on the old one. I hear mine making noises thanks again Amazon had it for 60 bucks. It'll be here tomorrow must be a very common thing
Took one from my car today and it looked exactly the same condition. It is getting replaced.
Hello Nathan. Was wondering if a bad disa flapper can cause a P0600 code on e46 330i 5 speed? Or any ideas what can cause that code.
Hello Nathan, my disa valve seems to be in good working condition, but the pin came off rather easily. Is there a way to keep it from coming out? Thanks.
2002 bmw 530i
I had a ruff idle a car seemed to be sorta weak in the mid rpm range I pull out the icv and it was a little dirty but working fine. However the DISA flap was completely missing and the pin was sitting just inside the hole. Never had any lights or codes. I sawed off the rest of the flapper frame and plugged the vacuum hole, thew the pin away and remove the actuator arm from the diaphragm. Put it back together and it runs great but still has the ruff idle. And thew a po174. My question is what could be the problem?
Is there a spring inside? Mine turns freely just like this one.
Mine is exactly the same, just moves around freely with no pressure at all.. is there any other way to test the DIAPHRAGM without the easy thumb method? Cheers
Useful
Nathan - just noticing the different sizes of DISA & flaps in this video. The one you replaced original with has a shorter flap (check video images here @ 3:50 and 4:20). Guessing the original DISA is off of a 3.0 M54 engine and you replaced with one for smaller engine? Or am I going blind - LOL...
thanks making sure before I change it. on in a update the sputtering was the purge valve I did change that. the sputtering stopped. thanks on another note do you have DIY on valve gasket replacement
I do have videos up on the valve cover gasket replacement
Pulled my disa valve off my 2007 530i and it sounds like there's fluid in the housing what could that be from?
Hey bro i think im having this problem.after doing my valve cover spark plugs coils etc i jave a rough idle after with my 645 90kmiles.
i have my new disa cuz i thought the old one was dead but when i put my key, it doesn't close like i've seen, why?
I don't know.. damn loss of torque, cold rough idle, P0174 bank 2 c ode.. fuel economy impacted some.. startup randomly stalls sometimes.
question? the P0161 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2) located pre cat or is the one under the car
the rear sensor for cylinders 3-6
i have never seen any improvement with fuel consumption on m54. disa/ccv/idle c.v./vacuum/maf... i have fuel trims 0 but bitch still eats like before. power - yas, consumption - at least i have never noticed. car does 0-100 time like factory. in logic if you have power improovement you should have consumption too but how much is that ? 200 grams per 100km ?
Italians go like: What isa disa? Disa is a valve.
LMFAO
Hello still having issues with my e46, i have changed spark plugs,purge valve. new air filters. haven't changed the bank 2 02 sensor yet. sparks plugs helped a little, i thought they had oil but it just was the loctite. going to search for vacuum leaks. other than that i am out of ideas!
have 2004 x3 don't give up, you can make a smoker for about 2 bucks from a pickle jar and old soldering iron( check youtube). take off air cleaner and MAF(easy) put a rubber glove over intake opening, cut tip off glove finger to shove smoker tube thru and now you have BMW bong to smoke engine. IF you have a scanner and lean codes, its almost always a vaccum leak. when you find them you can verify it with some propane but this requires patience since it has to get to O2 sensors then back to ECU to start seeing short term fuel trim go negative from the extra propane. I found the propane trick takes about a minute to work. don't forget to clean your MAF, takes 2 seconds.
Those things are so fragile, I got into a little fender bender with my e90 and the disa valve broke off completely and got sucked up into the motor and some pieces made it into the valves and bent a handful of them.. there was plastic pieces everywhere in the cylinders lol but yeah I got it rebuilt and its good now lol
Rocko Omazing damn dude! Lol one hell of a story behind that rebuild. Glad all is good. Love BMW! My E39 is my baby haha
exact same thing has happened to my e90 n52 2.5l.. going to garage tomorrow as i have not got the time or patience to dismantle my engine.. your comment has made me anxious lmao
i got the m54 it idles up and down when in park but runs smooth when pedal pressed could the disa be issue
Does this apply to the M52/E39 as well? (the non-TU)
Can this cause the car to stall at lower RPM’s?
Nathan thank you for the video, one question: my shop told me to change the 3/2 fuel way valve since my 740il 98 , should I buy a new one or just the regulator?
+Andrei Sames I am not familiar with changing that valve
ok, thank you for the reply Nathan
BMW love their plastic mix with metal things inside the engine.... which breaks the engine NICE engineering... LOL
great vid as usual. was in crawling stop and go traffic for about 2 hrs today when the engine suddenly shut down. was able to start it again and it ran normally in continued 5mph stop and go traffic. could this be a sign that the disa is going?
If its the m54 it could be MAF or cam or crank sensor
ok. replaced both cam sensors about 25k miles ago, July 2016. So I'm gonna check the MAF and crank sensor. Im getting the feeling that it may even be related to the periodic unstable idling. sometimes when i come to a stop, lets say, after pulling into a parking lot, or sometimes after switching off the ac at idle, the idle become unstable and surges for 10 to 15 seconds before normalizing.
maybe its the idler control valve.
I will have to check for codes.
let me know what the codes are ,and i can pretty much tell you exactly what to do
I did find oil on the last 2 tubes.
if it was in the spark plug tubes , and if the valve cover gasket is still soft you can just re-seal it
I'm fighting a 1188 1189 code right now you got any leads bro I'm losted
New ccv system
Mass air flow
I'm losted
a couple of questions for ya. first, if the car idles perfectly smoothly, is that a pretty good sign that there is nothing wrong with the disa valve? also, if there is a problem with disa, wouldn't there be a code?
Mine idled smooth. Its just that I had a check engine light, and I wasn't sure if that was going to cause me to not pass smog (CA). So I just went ahead and replaced it, and the light turned off.
can you give an idea where I can find parts I found some at autozone
Ebay is where you want to buy that stuff
Use 🧲 when unscrewed
The one I just changed was so fucked and rigged up but saved the pin so let’s gooo lol
one more thing the 02 sensor would be up stream or down stream?
Down stream
my 02 e46 is sputtering while i am idle and while i drive , i cleaned the throttle body. can you help thanks
was the throttle body boot ripped? any codes?
is this the same as code 2AA9?
Hello Nathan , what are the most common symptoms of the disa Valve going bad?
Trust me when I tell you this. When that bullshit of a valve goes bad. It literally takes the whole engine performance with it. Mine just been bad and since I’m not gonna waste my time getting a new one or one of those goofy rebuild kits which is bound to fail eventually again. I’m deleting that shit and swapping a M50 intake manifold onto my head. The main symptoms that normally happen are low RPM hesitations, rough idling at some times, rattling or a loud tick, sluggish acceleration and I tell you this. That sluggish acceleration is no joke, you know what it feels like to be driving normally and all of a sudden you feel you have to floor it just to get moving then you just feel your moving no where but you see the RPM climbing to 4,000 RPM while still in 2nd gear (Auto tranny) I’m ripping that garbage out of my car.
@@kiddsenatusthatpimp5392 appreciate the feedback
@BarbarossaBMW88 appreciate the feedback
Crazy, mine was same way, broken same way,whats up with the lil piece of fiberglass (im guessing)broken on side of flapper? I cant find it....but i did get rest of parts out..., well i pulled it out just like tou did and every thing was there except the lil piece off the corner of flapper.....what to do now????
Mine had 3 screws in it, 2003 x5 m54 V6
I have the M52TU engine and I am going to put the M54 intake manifold on it for more power.
Are the DISA valves interchangeable? Or will I need an M54 DISA valve too? (most manifolds aren't sold complete with the DISA valve).
The M52TU disa valve is smaller than the M54 item.
Is this the Reason my BMW is Hissing when the car is on? and Should i just Save my money and buy a newer one... I just bought the car from a Dealership and only had it for months...
hey question, my e46 2000 323i 200+ miles,
Cold starts really bad, revs jump harsh.
Jozy Lifts mine does too! You fix yours?
Dirty Idle Air Control valve...
Hey Nathan, I replaced the pin on my disa and al great now. But tell me... when you put your finger over the open port is it bad that the flap don't stay complete shut? I'm not getting enough vacuum for it to stay shut and it opens about a quarter of a inch!
Custom Car interiors had the same question. did u replace yours or put it back in
It's normal for the flap to partially return when you hold your finger over the hole, then it should stay in that position for a reasonable amount of time or the bellow has a hole in it and you would want to replace it. germanautosolutions.com/ has the best available, whether that be new, or if yours holds vacuum you could use one of their upgrade kits.
I had a p0174 code due to a leaking disa valve, the diaphragm had a small tear and it would leak, my check engine light would only come on when i would get on the freeway at 75 or 80 mph and it would go out by itself when driving slower on the streets, I was able to fix the diaphragm covering it with a condom, I hope this info helps somebody.
mateo dominguez Great! Now I know my valve won't get pregnant. Lol jk, I just had to say that. Tfs
Condom😂😂
should my disa valve be running with engine off when I open my hood?
I got that same issue and don't quite understand why
so I got a question what would be the estimate on that part brand new
you can get an oem for like $250-300 but i got some a no name brand for $100. It fit and the light for the air leak turned off.
Throttle body on a 328i dose it have to be programmed becuse mine is making the eml ligjt come on and the butterfly will not open what other year bmw parts can be used
It a 2000 328i
What happened if disa is corrupted
I have a 528i ..1997 m52 and i can not find the disa valve ..ita on an other location of engine or just doent mine have ?
The m50 and m52 does not have the disa only the 99 and up cars with the m52tu
Would a bad DISA valve throw a air to fuel ratio code?
Yes it could do if the o-ring is bad as you would then have a vacuum leak. The flap being broken though wouldn''t cause poor fuel trims I don't believe
ugh, just pulled mine off and the flap had jammed it, when I finally got it off, the pin was missing. I suppose I have to assume its inside already. Any suggestions?
I rebuilt my Disa valve on my e39. However during removal of the Disa valve, I noticed that the Disa unit smells of gas and wanted to know if that is normal
Yes it is normal
+Nathan's DIY Garage thanks. Also, I bought the parts off eBay that you spoke of. However I don't know if I regret it or not because I just read bad reviews about it after I repaired it using the $30 eBay kit. I read that the clip becomes loose and the flap will begin to spin freely after driving a few thousand miles. Have you experienced any such thing after using these refurbishing kits?
I have never had problems, maybe a drop of super glue or locktite will insure it will not come lose
Comment peut on présenter une vidéo avec un compartiment moteur aussi sale !?
I have a 2002 bmw 330i and my car just robbed me of power and when i start the car and leave it at normal idle it shakes and sounds like a vac leak and the exhaust sputters not sure what it could be
i'm having the same problem, did you find out what it was? thanks
I changed my disa valve and got horse power back
My disa valve pin was missing and the slap was broke so i replaced the pin,flap and the ring gasket
no boot still fine
does the breather from the valve cover have to be hidden? also does it need a specific length of hose? sit lower higher? same questions for the dip stick breather. plz
I usually make them about a foot long and make sure they are pointed up, may need to zip tie them up
Thank you very much. Also my vehicle makes this jet noise at cold start. It comes from passanger side front corner. Any ideas? Havent really had time to investigate. It goes away afer 2 to 3 minutes
Hello yes the secondary air pump hose likes to rot and leak, if your car is a 3 series the pump is right u set the hood, if it's a 5 series the pump is behind the bumper
+Nathan's DIY Garage can i just unplug it or should i go ahead and replace it? sorry tbis 528i just decided to take a nose dive in the last three months. need front hubs, rack and pinion. ball joints and bushings all around. just changed the suspension. motor randomely started running like complete crap but no loss of power. fuel pump also dicided to start and act up. great car i just think i got the short end of the stick with this one. so much stuff i could start my own blog haha
+Constantine Tamas and abs and traction countrol lights popped on. field day.
Question: my 2003 530i runs rough when I start it up and when it's cold; does it mean my disa valve could be the culprit? I don't get any error code and the engine runs smooth once it warms up. The rough idle at start up does not always happen either. Thanks,
Could be vanos seals, icv sticking or many other issues
Thank you for taking the time and responding to my question. Vanos was changed 60k ago, made a slight difference after that, but still have the little rough idle intermittently. As you said could be due to so many reasons. I just thought a faulty Disa Valve may have some impact
Based on the symptoms, rough idle at low rpm, I think sticky ICV may be a close culprit for the problem, thanks,
👍🏼
It's T 30 on my 1998 e39 520.. is it normal?
yeah long ass the screw fits maybe someone else put a different one
Hello Nathan. Would this trigger or could it trigger a check engine light ? Like the ecu is noticing something is wrong ?
Yes. A defective disa will result in a code.
Am I the only one with a E83 M54 which has NO ROOM to remove the Disa Valve? I can't find a video anywhere.
Remove the rubber throttle body boot and it will come right out
Even pushing it out of the way, it hits the plastic wall barrier that the brake booster cable runs through. I found a forum that explained you have to wiggle and twist and curse to remove that barrier. That's what I did and finally got it off. The orange o-ring is flat as can be so I ordered a replacement. I like your video's dude. Teach'n me a lot big time. I swear I can hear a vacuum leak causing the lean bank 1 and 2 errors. Once I had that barrier out of the way, I was able to put my iphone in the back in video record mode to get a better look at things. I've seen video's showing how the hoses just crack over time. I don't know what the deal is with BMW and rubber. Everything rubber on my X3 I'm having to replace. Front windshield trim, VC Gasket, CCV asssembly / kit. I remember reading somewhere that said BMW uses rubber products that are made from recycled material in order to get a Green friendly status or some tax break. Nonetheless.... in the back of the engine, instead of rotting hoses I found two rubber vacuum caps. What's up with that? Also, I noticed that on the intake side other video's show a hose connected from vc side, but when I look at mine, it just has a plug where others have a hose. Any idea what that's about? I am in California.... all I can think is it has something to do with that.
I finally got it out after removing the plastic barrier that separates the brake booster from the engine bay. Of course that couldn't be removed without first removing the cabin filter assembly beforehand. Without the barrier separator removed I could get a decent look at the vacuum lines between the engine and the cabin firewall. Once I had enough room to squeeze my iPhone and hand back there, I was able to film a video so I could get a much better look. Instead of finding vacuum lines like I've seen in multiple video's ....I had rubber vacuum caps that had dried to the point that cracks in the cap were causing the vacuum leak I'd been chasing for hours. Went to pepboys and bought vacuum caps that fit. And all was good again. SES lean codes, once cleared, have yet to return. Keep the video's coming... some of us need all the help we can get.
That pin fell into one of my cylinders, luckily never bent any valves.
a pin cannot faal in engine becose its to long
170,000Mls and engine never been cleaned !!! You are allowed to clean it when you clean the outside.
Hy!
I removed DISA valve on M43 and tested it (it stays partially closed when i put finger on the hole, it also stays partially closed if i apply 12V to contacts), but when i reinstalled it it sounds like it rattles.
So i checked crankcase for vacuum (under oil cap there is almost no vacuum or pressure). Engine also stars running kinda rough without oil cap.
Could the CCV valve be bad? Any suggestions?
(the problem with car is low torque at idle)
Also worth mentioning, i guess, is that when i first took off the oil cap engine almost stalled (but it didn't stall).
Thanks
I removed CCV and the gasket is kinda flattened, not making good seal, gona replace the whole valve and i hope it fixes it.
Did you solved it? I have disa valve rattling on M43 so i disconnected it and now is silent but low torque under 2000 rpm. Will i just need to fix disa valve with repair kit?
@@LuckyDayNaples yes i solved it.
replaced both rubber membranes (one was ok so it appeared fine when doing test on the bench), but the other membrane was torn.
so i just replaced both and its fine now
Tyty
My car has 96k miles and my disa was completely destroyed
here the codes.
P1350
P0313
P0161
P0444
Loos like you have a vacuum leak, needs a o2 sensor, cylinder 3-6 the rear sensor, possibly need to do the spark plugs or at least check the tubes for oil from the valve cover, and the gas tank purge valve located behind the power steering tank.