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dodged a bullet - DISA valve disintegrated

Discuss problems you have had or are having with your Z4
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ranski
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dodged a bullet - DISA valve disintegrated

Post by ranski » Wed May 02, 2012 11:29 pm

I think the new one is slightly different? well at least the part number is


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Re: dodged a bullet - DISA valve disintegrated

Post by Bing » Wed May 02, 2012 11:32 pm

ranski wrote:I think the new one is slightly different? well at least the part number is


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The facelift is different - no metal pin, green rubber seals, and appears to be motorised / electronically operated as it isn't possible to move the valve by hand.
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Re: dodged a bullet - DISA valve disintegrated

Post by markeg » Wed May 02, 2012 11:39 pm

Stuart Truman wrote:Unfortunately yes, there are a couple of threads on here. Bing recently posted a pic laden post here on checking them http://www.z4-forum.com/forum/viewtopic ... SA#p497974
Glad you caught it before it got really nasty
Have you done it on yours Stuart (Being that ours are the M52 (S52B32) version) ? Haven't got any rattles (yet) but may just do a sanity check at the weekend.... wondering if there are any gotchas.
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Re: dodged a bullet - DISA valve disintegrated

Post by andysat » Thu May 03, 2012 8:07 pm

PHEW that was close!!!!
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Re: dodged a bullet - DISA valve disintegrated

Post by IvanDobskey » Fri May 04, 2012 8:02 pm

Yikes, very lucky escape indeed! Got mine checked as part of my last service. No problems found and mine has done 78k.
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Re: dodged a bullet - DISA valve disintegrated

Post by Stuart Truman » Fri May 04, 2012 8:39 pm

Stromtech wrote:Only 1 wiring connector, 2 torx bolts and about 10 minutes time...not much to figure out. It's easily assessable.

And from everything I have read the only changes made to the DISA were for the N52 engine. The M54 still uses the original DISA design and should be inspected at 50K. My new one on my 3.0i M54 (2 months ago) still had the same design with the same metal pin.
God alone knows what I've got with the mashup N52 B32 engine in an Alpina. I need a specsavers type ad. "Should have bought an M"
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Re: dodged a bullet - DISA valve disintegrated

Post by bigshurv » Fri May 04, 2012 9:04 pm

Mine had done about 50 k when it started rattling. I changed it straight away, took me about 10 mins.Could have driven it for a few more miles but decided it wasn'y worth it.Don't change it if it's not rattling.

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Re: dodged a bullet - DISA valve disintegrated

Post by EdsTTer » Sun Jun 24, 2012 4:10 pm

Hi guys, even though it doesn't seem to be rattling, I just checked my DISA whilst I was investigating my "ghost whistle" (yep, there's a split in the concertina part of the lower inlet boot)

The metal pin seems to be secure but the flap has about 5mm of rotational slack before it stiffens up against the actuator piston. Is this normal? The YouTube vids seem to show no slack when turning the flap by hand...

The cars a 2003 2.5i and done 66K. Would you advise replacing it?
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Re: dodged a bullet - DISA valve disintegrated

Post by bigshurv » Mon Jun 25, 2012 11:23 am

A new one has no slack, so yours is showing some signs of wear.Mine had started rattling a bit which drew me to investigate it and did indeed have similar movement to yours. If it was mine,I'd replace it.

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Re: dodged a bullet - DISA valve disintegrated

Post by EdsTTer » Mon Jun 25, 2012 12:35 pm

Thanks bigshurv.
I'm collecting a new one at 1:30 today :) £124.65 + vat from the Stealers... and a new rubber inlet boot.
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dodged a bullet - DISA valve disintegrated

Post by motoroller » Mon Oct 15, 2018 9:52 pm

Do the Alpinas have DISA valves? Saw some discussion but no conclusion!
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dodged a bullet - DISA valve disintegrated

Post by kis » Tue Oct 16, 2018 9:53 am

Quite an old thread you've revived there buddy!
If you've got an Alpina it will be easy to check? Just pop the bonnet. I'd be surprised if they don't have one if I'm honest.
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dodged a bullet - DISA valve disintegrated

Post by Jembo » Tue Oct 16, 2018 10:03 am

kis wrote: Tue Oct 16, 2018 9:53 am Quite an old thread you've revived there buddy!
If you've got an Alpina it will be easy to check? Just pop the bonnet. I'd be surprised if they don't have one if I'm honest.
Yup & for any pre facelift E85 owners, I previously found a full quality aluminum replacement on eBay, though on 60k my old one was still as good as new - Perry may be able to advise further given Q is now about Alpinas

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dodged a bullet - DISA valve disintegrated

Post by BeeEmm » Tue Oct 16, 2018 11:33 am

nickoneone wrote: Wed May 02, 2012 8:40 pm Then the orange engine warning light came on. Continued for 300 miles with the intention of taking the car into the garage when I got to Lincoln.
You drove 300 miles with the engine warning light on? 300 miles? Just noticed it was an old post, but 300 miles.
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dodged a bullet - DISA valve disintegrated

Post by Mike6 » Tue Oct 16, 2018 5:18 pm

Dont think the pin can drop into the engine as its held captively. I believe they have been known to drop into the engine when removing the DISA as a whole. So if you are removing the DISA be very careful when removing the unit.

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