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Discussion Starter #1
Hey all,

I've done a search of the following part in the forum but have found nothing come up. I apologise if anyone has answered this question in the past.

My Z3 has a Cylinder air intake warming controller (11611247752) that seems to be corroded in the pipeline. The car hasn't been running on the road for the past year or so; however, when it was, it ran alright but had no real power. It is hardly surprising tho because it is the 1.9L 1997 automatic. When I run the engine now, it all sounds good.

Does anyone know if this can be cleaned out (probably with a drill) or does it need replacing? The corrosion deposits are extremely hard in there but a drill bit turned by hand has started to remove it. I'm just not sure on what is goin on inside - if there are any channels that may be blocked other than the pipes.

Also, if anyone knows of any other items that may be affected by this.

Thank you
 

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BMW CCA 1405
1997 BMW Z3 1.9
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5,175 Posts
... Cylinder air intake warming controller (11611247752) that seems to be corroded in the pipeline... Does anyone know if this can be cleaned out (probably with a drill) or does it need replacing? The corrosion deposits are extremely hard in there but a drill bit turned by hand has started to remove it...
The PN is called a flange (No. 12 in RealOEM) and appears to be a warming plate with coolant passages and a thermostatic spring valve, between the throttle body and the intake manifold.
http://www.realoem.com/bmw/enUS/sho...-1996-Z3-BMW-Z3_19&diagId=11_1569#11611247752

If you can't remove the crystallized coolant deposits, you could buy a used part on eBay or Amazon.
https://www.amazon.com/BMW-Cylinder-intake-warming-controller/dp/B00LEWKMCE
Or a new part:
https://www.ecstuning.com/Search/11611247752/ES25260/
 

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Discussion Starter #3
Thank you. I have been looking on amazon/ebay etc but I live in Dubai so the shipping can be quite expensive. I've already bought the crank case vent valve and that's when I found the pipes gone bad. I just don't know why they are corroding. Ill try with my parts place out here to see if they're cheaper. Because you said there is a "thermostatic spring valve" then Ill get it replaced.

Thank you
 

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BMW CCA 1405
1997 BMW Z3 1.9
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5,175 Posts
I would think the plate's passages are blocked with deposits, and the plate itself is not corroding.
The pictures of the part show a round black thing with a tube connection, and I was only assuming it is some kind of controlling device like the thermostatic spring.
It is not shown in RealOEM in the diagram with the flange, so I think it is a separate part. Maybe it is No. 16 here:
http://www.realoem.com/bmw/enUS/showparts?id=CH73-USA-10-1996-Z3-BMW-Z3_19&diagId=11_1562
But that is the crankcase vent valve. Maybe it has an air passage into the flange.
 

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Try soaking the part in vinegar/water mix, perhaps 50/50, this could take some time but it is a mixture used to remove hard water deposits.
You can google "how to remove hard water deposits" and you will see lots of chemicals and methods, vinegar is the cheapest and very effective sometimes.
 

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you should not get calcium deposits from the cooling/heating system, if you do then its been filled with very hard water which is not good.
Pure vinegar (acetic acid) will remove deposits after a good soak.
Corroding aluminum looks very similar and is more likely. Anti freeze stops this.
 
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