WTB BMW E12 E28 Air Intake Box M30 Air Intake Box

Antar

Antar

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I am looking for a clean BMW 528i Air Box to help me complete my recently converted E9 3.5 engine/5sp project. I included some good examples of the set up I am looking for.

Also looking for options for the rubber cover for a Mass Air Flow unit cover as mine was missing from my recent conversion. I included a photo.

Thanks,

Antar Johnson
 

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I believe 80-85 BMW 528 air box ? Let me see if we can get @sfdon to weigh in. My engine is a M30B35 from an 85 535i. I included a picture of my current set up in the picture just in case it may help.
 

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I realize you're seeking the air intake box but there are some maintenance details that might matter over time.

Firstly, the motor from earlier than 1988 is likely a m30b34 and this one looks to be so. The side of the intake
manifold will likely say "3.2/3.5".

The air meter shown is an air flow meter, not a mass air meter. This is indicated by the electrical wiper arm.
A common aging issue on the AFM is poor engine response off-idle, caused by wearout of the carbon resistance track,
mostly near the idle position. It can be improved by hogging out the mounting holes of the pcb and shifting the board position to fresh track.

This is a motronic 1.0 system, computer 059 (probably). Double check that if you need to buy a replacement.
The crank position sensors are on the bell housing. The m30b35 is Mot [EDIT: 1.3, not 1.2] and has sensor on the balancer in front.

The first 2 engine pictures depict Mot [EDIT: 1.3 AFM, not 1.2 MAF] with plastic cover, the later pictures depict Mot 1.0 AFM with waffle pattern aluminum cover.

I could be slightly off on details so double check the assertions.
 
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Airbox is the same from ‘77 E12 through ‘89 E24. Later ones were aluminum. All of them were black. US-spec aluminum lids had a different, less pleasing pattern stamped into them. The B35 E24 airbox lids had no markings and are unique to those cars.

I would offer you one but I don’t know exactly what I’ve got available.
 
E24 type.

Metal supporting bracket visible underneath the air box is removable.
I could be able to organize some in case of a need. PM me if you would be interested.

1677056216620.png
 
Antar - I would consider replacing that mass air flow unit rather than putting another cover on it. Unless you opened it, it is possible that it was opened because it was not working properly. And unless you removed the cover and know how it was stored after that, I would be concerned that components inside may have been altered or perhaps damaged by exposure to moisture, dirt, etc..
 
Ohmess said:
Antar - I would consider replacing that mass air flow unit rather than putting another cover on it. Unless you opened it, it is possible that it was opened because it was not working properly. And unless you removed the cover and know how it was stored after that, I would be concerned that components inside may have been altered or perhaps damaged by exposure to moisture, dirt, etc..
Click to expand...
Excellent suggestion , I appreciate that, Thanks!
The AFM cover was missing when I purchased the package and like you said there is a reason the cover was opened. Therefore, I will purchase a new Mass Air Flow Unit. Any suggestions for better performance?
 
I think you need the unit designed to work with the stock system. One of the key benefits of changing to an m35 is the fact that all the standard tuning and trouble shooting materials apply. Any old school BMW mechanic can work on your car.
 
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skk said:
I realize you're seeking the air intake box but there are some maintenance details that might matter over time.

Firstly, the motor from earlier than 1988 is likely a m30b34 and this one looks to be so. The side of the intake
manifold will likely say "3.2/3.5".

The air meter shown is an air flow meter, not a mass air meter. This is indicated by the electrical wiper arm.
A common aging issue on the AFM is poor engine response off-idle, caused by wearout of the carbon resistance track,
mostly near the idle position. It can be improved by hogging out the mounting holes of the pcb and shifting the board position to fresh track.

This is a motronic 1.0 system, computer 059 (probably). Double check that if you need to buy a replacement.
The crank position sensors are on the bell housing. The m30b35 is Mot 1.2 and has sensor on the balancer in front.

The first 2 engine pictures depict Mot 1.2 MAF with plastic cover, the later pictures depict Mot 1.0 AFM with waffle pattern aluminum cover.

I could be slightly off on details so double check the assertions.
Click to expand...
SSK -thanks for those details I am going to have to update my notes because due to your detailed response I probably have a m30b34 not 3.5. (I do remember that the engine came from a Euro higher compression 535i engine.) Not sure if that makes much of a difference in your analysis though. But again thank you!
 
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