BMW M30 Engine Intake Manifold Overview: Vacuum Hoses & Components - E32 735i & E34 535i
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- Опубликовано: 14 окт 2020
- ** Update ** I made a mistake in the video: the bare bolt to hold the fuel rail goes to the very front of the engine. The brackets for the injector wiring go to the middle and to the back. Sorry!
Ever wondered where all the vacuum hoses on the M30 intake manifold go? Wonder no more! In this video we'll take a look at the intake manifold and go over each component and vacuum hose. 
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This was made back when BMW made true craftsmanship instead of making everything out of cheap Chinese plastic.
Look at all that metal and engineering that went into that intake manifold. A shame they don't build them like that anymore.
One of the clearest and most detailed videos I have seen on the M30 engine on RUclips! An instant classic! Your documentation of the intake manifold configuration is a "first" and so well done. I enjoyed every minute of it. Thank you for taking the time to do it and sharing it with all of us!
Thank you for the kind words!! I'm very glad my video was helpful.
This video is absolute GOLD. When we speak of perfection, precision, clarity, application this video is a thing of beauty and a critical necessity to anyone trying to not only rebuild or clean the manifold and or injectors but it helps to find vacuum leaks. I just bought a 1988 BMW 735i that has sat for 16 years. I did not try and crank the car so I had no idea if the car would run I just gambled. Replaced fluids, plugs, fuel pump, fuel regulator went to crank it and it fired right up. Stoked.Then I noticed a horrible low idle in park until you hit the gas then up and down on the idle, then it smooths out. Put it in gear and it starts shaking and idle is erratic, lots of sputtering. Under the hood I can hear hissing. Been on this for weeks, found this video was able to trace the lines and found that the hose to the intake hose was halfway on and I pulled it off way too easily.. I am hoping this is my culprit. Maybe not, I don't know but atleast I am making progress now because I have been runninbg in place for way too long. You Sir, are a gift to mankind.
What a wonderful and humbling comment to read! Thank you for your gratitude.
I hope the small vacuum fix was enough to resolve your issue! Please keep me posted!
That's exactly what I was looking for thanks for showing where all hoses go and what they do.
You're welcome!
Well explained, thank you. I benefited from your unparalleled explanation. Thank you
Glad you enjoyed the video! Thanks for the kind words.
excellent video please make more I recently purchased a 1991 735i. I look forward to watching you tutorials to help me keep my car running.
Thanks, the plan is to continue making videos as time (and budget!) allows. Soon I should be releasing a video about replacing the center link, sway bar links and idler arm bushing.
Thank you for this valuable information,
I'm going to buy a bmw 735 i e32, so this will come in handy...
Such a simple engine, wish engines were still as easy to understand as these old lumps of metal
Thank you! This helped me replace my dry rotted fuel pressure regulator vacuum hose. I didn't want to touch it because I didn't know where it went but now I know you can reach under there and replace it.
Glad my video helped you!
Great video- thanks for showing the manifold like this!!
Merci, grâce à ta vidéo où tu détailles chaque pièce et chaque étape, j'ai pu remettre mes durits d'air correctement. J'en avais plusieurs branchées au mauvais endroit ou débranchées.
Nice video. Wush i had seen this a year ago before I rebuilt my m30b35 engine.
Thanks for your comment. How did the rebuild go? Was there an issue with the engine or was it a preventative rebuild due to age/wear? I'd really like to do that some day, but lifting an engine and transmission sounds quite involved.
Love the way way you explain things in detail and to the point. Thank you for taking the time and effort to make this excellent tutorial video!
Thanks, I'm glad you found it useful!
great illustration -pedagogic way to inform ! i have e28 533I ...//dificulty to find this Vacuum hoses & connections ..!
Glad it helped you!
Very nice video, thank you for providing information about the old BMW gems ;)
Glad you liked it, thanks for watching!
Thank you! Excellent video!
It's such an unusual design...however watching Jay Leno's Garage the other week a very early Duesenberg (early 20th C.) there was an incredibly similar design with the main vertical plenum chamber and side runners. Amazing & very recommended to see perhaps early inspiration for BMW. F.Y.I. Alpina (and others) produced a version of this manifold putting the T.B. on the other side. I believe the injectors changed from the single pintle design with ribbing to a smooth "capped" design, both in yellow c.1989/90? Watch for the intake gaskets ever so slightly not quite matching the head ports: a fine file can take care of this. I see the cursed Cosmolene shipping coating there...if you find an easy way to melt this away sympathetically my first born is in the post lol! Really like the easy going and specific video mate, you have excellent standards & all your parts are impressively clean. :)
Thanks for the kind words Aussie BMW :) I just happened to clean the intake manifold before reinstallation, it wasn't that clean before! I couldn't get the cosmoline off with regular degreaser but I didn't try too hard. I didn't want to damage the finish on the good-looking areas. Maybe someday I'll get the intake, valve cover and oil filter housing painted in the factory silver color.
Awesome videos Thank You !!!!!
Thanks!
Im in New Zealand good work !
Thanks for the kind words!
This video is awesome - definitely does help when working on your car 👌
Thanks!
Wonderfully helpful!
Thank you!
Thanks! I'm glad it was useful!
Thanks!
Brilliant! Trully helpfull video
Thank you!
nice video, i want to get mine out to paint it (everything is cleaned out by a bmw only specialist garage and there is only this that looks dirty) and i absolutly am shitting my pants. my rocker cover is already painted because it was very easy to remove paint and change the gasket.. thanks for the video my guy
Great video
Thank you!
Thank you for sharing this
Hi! I'm glad you found it useful :)
What a great video, very helpful, thanks! I bet there are some slight differences between yours e32 and mine e24 but the overall design is the same :)
Glad you found it helpful! Yes I think there are some differences. For instance between the two studs at the bottom, on RealOEM, several caps are listed in the parts list, to cap a hole. On my intake the cap is cast into the aluminium. There might be some differences for EML-equipped cars too but I'm not sure...
The final E24 models (1988 and 1989) actually used the same M30B35 engine as the E34 and E32. This was the best and final version of the M30 putting out 218 hp in non-catalytic converter spec and 211 horsepower with catalytic converters.
@@houseofno yep, that’s what I’ve got in my ‘88 635CSI. I love this car :)
Beautiful
Thank you!
I absolutely love and learned a lot from your videos. I know it's not directly related to this video but I'm wondering if you're able to help or give some advise? I have a 1988 e32 730i and need to change the head gasket but I am struggling to get off the head bolts. Would you have any ideas on how I can remove them?
You said you were wrong with the short vacuum pipe but i didnt understand what was actually wrong in the video. Is the short tube supposed to go somewhere else? Edit: i just finished vid now and i see now. I commented right after watching that part where you said you were wrong
The 16” vacuum hose going to the fuel regulator, what diameter would that be? Thank you. Great video as usual.
The hose I used was from CRP (part of the Continental group) and it measured 3.5 x 2mm.
Спасибо за ролик)))
Благодарю вас! Удовольствие мое.
Hey again, thanks for the video, that really helps! Did you also make a video about the removal of the intake manifold?
After removing the air intake tubes, throttle, injection rail etc, it should come out quite easily or is there anything else to consider?
Glad it helps! About the intake removal video - yes and no. I recorded the process, but the end result was so bad that I decided not to use it. The video was too dark and grainy (my camera isn't very good) and the audio was bad.
Other than what you mentioned there aren't any special considerations for the removal of the intake, no. The lower nuts are the most difficult IMO, because of tight clearance. I used a stubby offset wrench from SK Tools and it helped a lot. A crescent or half moon wrench might work too. When reinstalling the intake I suggest that you keep the fuel rail and injectors loose. If the first injector is seated in the intake manifold, it won't clear the upper coolant hose.
@@ClassicBMWFanInQuebec yeah I wanted to remove the injectors anyway to replace the small O-rings on them because they are often pretty worn.
Another question I have is about the valve you show at 9:00 , are you sure the two lines that connect to it (the bent tube that goes to the manifold and the other that goes to the charcoal canister) are vacuum lines?
Because in the parts catalogue they are defined as fuel hoses?!
@@piano302 Yes it's true, in a sense it is a fuel hose because it is used to vent the fuel vapours from the gas tank. That's why the hoses are much thicker than the other vacuum hoses. The purge valve uses the vacuum of the engine to vent the fuel vapours towards the intake manifold, for combustion. At least that's how I understand it... I should have made it clearer in the video.
@@ClassicBMWFanInQuebec Is there still a posibility u could make a video to remove the intake manifold? It's probably a weird question, since u have already done maintenance to it..
@@leay6654 Hi, yes I recorded the removal process. But I did not finish editing it, because the recording was not very good. One day I might finish it though...
hey, thanks you so much for the helpful video! can you help tell me how did you torque the manifold nuts? I have mine on now with only hand-tightened nuts while I try to figure out how to torque them.
thanks :)
Hi Adam, I could only torque the top nuts but not the bottom ones. Like you said a torque wrench wouldn't fit in such a tight space. Here is what I did: 1) I used a torque wrench to set the right torque for the top nuts 2) checked how that torque felt like with a hand tool 3) tightened the lower nuts using the same hand tool until I felt approximately the same torque.
To spread the load evenly I started with the center runner nuts, then did the next runners on each side and moved this way across all the runners. It's not overly critical I think to torque the manifold evenly, but out of precaution I opted to do that. Good luck!
@@ClassicBMWFanInQuebec thank you so much for the detailed info this is very helpful! I'll do the same thing on mine! I saw your smoke test video so it proves that it can be done without a torque wrench 🔧. One more thing if you don't mind. I look all over the service book with no luck finding the tourqe spec for those nuts and online some said it's 11 foot pound is that what you used?
Thanks again, looking forward for more of your videos. If you have instagram let me know
@@adamshar5180 Right yes, I remember looking for a torque spec in the Bentley manual and not finding it. I believe I went with 16 ft/lbs of torque, that's what I found on mye28.com.
I do not have an instagram account sorry. I'm not on social media and I hang out on bimmerforums instead.
@@ClassicBMWFanInQuebec got it, I'll do that! for sure no worries!
I was looking to see how to change a fuel injector. There is some help here because I need to uninstall the injector wire harness tray and I see there are supposed to be 2 fasteners. This is where I am stuck…moving this wire harness tray and accessing the fuel injector’s connector. Thanks for posting . Do you have any videos specific to my problem?
Hi Donald, I think you mean the two fasteners on top of the wiring casing, under the round plastic caps? I show this process in my Spring 2021 update video, when I replaced my injectors. I hope it helps you: ruclips.net/video/z37noIezCQ8/видео.html
Hey! I will be replacing my vacuum hoses soon, but i can't find some of those hoses for sale... what should i do? I have the part numbers but they aren't available anywhere!
Hi, you could bring your old hoses to a parts store and match the same outer and inner diameter with stock hoses.
Or you can buy matching hoses from the aftermarket. For example I bought these hoses:
CRP W0133-2391077
Elaplast 1638384
hi can you help me find the brake cylinder for an e32 730i 1992 automatic i dont know witch one i have to buy
Hi, I recommend you check on RealOEM.com for the specific part for your car. Simply enter your vehicle information and then pick the Brakes category, you will see the part number for the master cylinder.
Isnt the cold start under the intake mandifold? on my e23 I believe it is
Yes, probably on an earlier version of the intake manifold. On this later "B35" variant there is no cold start valve.
@@ClassicBMWFanInQuebec ah oki. There is a hose on the intake manifold that drips oil on my cold start valve. I think it might be from that big "hose". Why would oil come there? Thank you for answering. Great video as always!
@@Rockelement Thanks :) I don't know how it is set up on the E23... but I would guess it's related to the crankcase ventilation system. From what I understand there is a tube that carries oily/misty fumes into the intake so it can be burned, instead of releasing it into the atmosphere. Maybe that tube is torn. Do you get clouds of smoke from the exhaust pipe occasionally?
تحيه طيبه لدي بي ام دبليو اواجه مشكله في العزم هل يمكنك المساعده
Please write here your trouble, and maybe myself or others can help you. :)
Give his good BMW 735 3.5 I have a problem in the morning in the morning works normal but when you get out to the street does not accept walking to the light
And the problem in the fuel vapor system
The fuel vapor system in which I am impressed and thank you
Where you say “I was wrong”. …what was wrong?
Hmm I don't recall the moment when I said it... Maybe it was the routing of the smaller vacuum hoses?