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N52 Small DISA rubber perished - Need advice on replacement

Posted: Tue Mar 19, 2019 1:31 pm
by propaintballa
Hi guys,

I've got an ongoing thread (viewtopic.php?f=3&t=110050) about issues with my N52 engined E91. I finally bit the bullet and decided to renew the CCV system, so today I got the intake manifold off (ballache). I had a feeling there was going to be an issue with the inner DISA valve and to my surprise, the flap is rigid and I suspect it works fine, but the rubber seal on the unit has broken away in several places (pictures below).

I am wondering if anyone know where I can source one other than a dealer, as I think they are about £250. Seems it's really difficult to find OE quality parts in the UK. Any advice would be greatly appreciated, as the car will be off the road until I can find a replacement unit!

Thanks

N52 Small DISA rubber perished - Need advice on replacement

Posted: Tue Mar 19, 2019 2:28 pm
by PinkPineapple44
How's this for you? https://www.autodoc.co.uk/metzger/12821014

I've used autodoc multiple times for beemer and audi parts over the past couple of years without any complaints thus far.

N52 Small DISA rubber perished - Need advice on replacement

Posted: Tue Mar 19, 2019 4:23 pm
by propaintballa
PinkPineapple44 wrote:
Tue Mar 19, 2019 2:28 pm
How's this for you? https://www.autodoc.co.uk/metzger/12821014

I've used autodoc multiple times for beemer and audi parts over the past couple of years without any complaints thus far.
I have to say, I wondered about that site when looking for CCV parts, but encountered pretty mixed reviews. I also looked at it for the DISA but I wasn't sure about the quality of the various brands. As such, I ended up befriending a guy from Sytner near me and got a bit of a discount. £238 for the small DISA, which is ludicrous, but I can get it tomorrow morning and can be sure of the quality.

Out of interest, I don't suppose you have any experience of the quality of parts made by the manufacturer in your link? For future when something else breaks haha.

N52 Small DISA rubber perished - Need advice on replacement

Posted: Tue Mar 19, 2019 9:36 pm
by Bing
Wow. I did a how-to on how to inspect your disa on an n52 a few years ago now and mine was fine. Lots of people have used it since, definitely worth posting a link to this thread as an update so people are not lulled into a false sense of security and decide not to check it :thumbsup:

I’ll do it now, good news you’ve caught it... I wonder where those rubber bits are now though :?

N52 Small DISA rubber perished - Need advice on replacement

Posted: Wed Mar 20, 2019 12:04 am
by ph001
Even if the rubber has perished slightly and leaking a small amount of air, i’m not convinced it would have any impact on performance or smooth running. You have to remember that the only purpose of these valves is to alter the effective inlet manifold lenght to aid induction at certain rpms. Its really more an optimisation than a critical function.

N52 Small DISA rubber perished - Need advice on replacement

Posted: Thu Mar 21, 2019 3:41 pm
by PinkPineapple44
propaintballa wrote:
Tue Mar 19, 2019 4:23 pm
PinkPineapple44 wrote:
Tue Mar 19, 2019 2:28 pm
How's this for you? https://www.autodoc.co.uk/metzger/12821014

I've used autodoc multiple times for beemer and audi parts over the past couple of years without any complaints thus far.
I have to say, I wondered about that site when looking for CCV parts, but encountered pretty mixed reviews. I also looked at it for the DISA but I wasn't sure about the quality of the various brands. As such, I ended up befriending a guy from Sytner near me and got a bit of a discount. £238 for the small DISA, which is ludicrous, but I can get it tomorrow morning and can be sure of the quality.

Out of interest, I don't suppose you have any experience of the quality of parts made by the manufacturer in your link? For future when something else breaks haha.
No sorry, I haven't used that specific brand. I tend to stick with the higher quality brands such as Bosch, Mann etc but have used a couple I had never heard of before. Did some research first before biting the bullet just to make sure they weren't total trash though!

N52 Small DISA rubber perished - Need advice on replacement

Posted: Sat May 11, 2019 11:48 am
by juld0zer
For the small one it might be worth a punt with an aftermarket part as it is accessible with the manifold installed, unlike the inner one.

N52 Small DISA rubber perished - Need advice on replacement

Posted: Thu Apr 16, 2020 8:34 am
by mcentral
Holy crap wow I have the same exact issue right now!
I'm replacing my CCV with the whole kit from FCPEuro and when I took my intake manifold off there was a little bit of oil.
I cleaned everything and took off both DISA Valve.
The bigger one by the throttle body was so bad the flap was dangling. The inner smaller one behind the manifold look exactly like yours.
It was stiff but some of the rubber look like it came off but it look exactly like your pictures.
I'm buying the bigger DISA Vavle ESK 001 for sure but I'm debating on the smaller one.
Did you end up getting a new one or just stuck it back in and did it make a difference?

N52 Small DISA rubber perished - Need advice on replacement

Posted: Thu Apr 16, 2020 8:45 am
by RobbiZ4
There exists a test option in IN.PA for these flaps. Replacement decisions should be also taken on test results, not only by "feelings".
Take it off and check the electrical movement of the flaps. Mine stucked while closing, opening was fine. Sometimes you can find a documented fault code.

N52 Small DISA rubber perished - Need advice on replacement

Posted: Thu Apr 16, 2020 8:57 am
by mcentral
RobbiZ4 wrote:
Thu Apr 16, 2020 8:45 am
There exists a test option in IN.PA for these flaps. Replacement decisions should be also taken on test results, not only by "feelings".
Take it off and check the electrical movement of the flaps. Mine stucked while closing, opening was fine. Sometimes you can find a documented fault code.
Aw bummer, I should done that test when it was still on the car. I do have IN.PA installed on my computer in the garage but everything is already off on the work bench to replace the new BMW CCV. I did ran a test and everything was clear and no codes prior to the removal. It's only a tiny idle fluctuation(100-200 rpm idk needle moved a little) during start up for maybe 5 seconds and the sluggishness during around 3-5k rpm. I'm about to buy the larger OEM BMW DISA valve but at this point might just have to get the smaller one too. With all this Coronavirus and working from home I have more time to work on this car anyways.

N52 Small DISA rubber perished - Need advice on replacement

Posted: Thu Apr 16, 2020 9:28 am
by RobbiZ4
:(

N52 Small DISA rubber perished - Need advice on replacement

Posted: Thu Apr 16, 2020 9:52 am
by RobbiZ4
:(

N52 Small DISA rubber perished - Need advice on replacement

Posted: Thu Apr 16, 2020 8:32 pm
by ph001
I’m not entirely sure if the INPA test tells you anything meaningful, I don’t really see how it can report on the condition of the rubber seal at all...or even if the flap is moving cleanly or not. I suspect the best it can do is report that the servo coil is there electrically and draws the expected current.

Bear in mind the post I made above.

N52 Small DISA rubber perished - Need advice on replacement

Posted: Thu Apr 16, 2020 10:27 pm
by RobbiZ4
:(

N52 Small DISA rubber perished - Need advice on replacement

Posted: Sat Apr 18, 2020 1:03 am
by mcentral
I wrote a bunch of stuff earlier but it all got wipe when I stepped out for a little bit, had to log back in. :x
Anyways I basically went ahead and did the test and it appears to be functioning but not perfect. I order 2 new units.
[youtube]https://youtu.be/EiStxboZCzM[/youtube]