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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 07-04-2020, 02:46 PM
rav31 rav31 is offline
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M54 DISA Valve rebuild

In light of the (2) posts below by McLarenBMW concerning the upper pivot pin damaging the engine, I want to replace or rebuild my current OEM DISA valve in my '05 330icc ZHP with 92K. I was looking for your suggestions as what to do. A new one from FCPeuro is $375; the Rein unit is $154; they offer a repair kit (with pin) for $50; I found the Aluminum kit from X8R for $90.

What are your recommendations? NEW or REBUILD? I feel that I should stay away from the "PIN" units due to the possible issues of the pin being digested.

Thanks
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Old 07-04-2020, 02:51 PM
FredoinSF FredoinSF is offline
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Use this rebuild kit.
https://germanautosolutions.com/prod...sa-repair-kit/

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Old 07-04-2020, 05:27 PM
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Yes, I also vote for the G.A.S. kit as well, you will not regret it. After a rebuild with their kit, you will have a DISA valve that is superior to a new factory unit.
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  #4  
Old 07-04-2020, 06:01 PM
meinbills meinbills is offline
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+100 G.A.S. kit. The only thing I am concerned about my DISA is the o-ring gasket that might leak in the future, not the pin getting loose.
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Old 07-04-2020, 06:12 PM
McLarenBMW McLarenBMW is offline
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I'm glad my misery can bring awareness to this issue, good luck my friends
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Old 07-04-2020, 06:16 PM
McLarenBMW McLarenBMW is offline
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Also X8R and GAS are the best kits available. Be very careful when removing your old DISA as the pin could be loose and prone to falling out like mine. If you can detach the brake booster hose and lift the heat shield out for more room then do so, the best way to get it out is to aim it downwards so the pin can't fall out

Last edited by McLarenBMW; 07-04-2020 at 06:21 PM.
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Old 07-05-2020, 04:53 AM
rav31 rav31 is offline
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Great feed back! Thanks....One question...

Have you guys that recomment the GAS Kit actually installed it on your DISA?
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Old 07-05-2020, 05:29 AM
tttomttt tttomttt is offline
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I would first make sure the diaphragm does not leak as that is another source of a failed disa valve. If it in fact passes the diaphragm test I would not hesitate to rebuild it with the GAS kit.
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Old 07-05-2020, 05:48 AM
rav31 rav31 is offline
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Quote:
Originally Posted by tttomttt View Post
I would first make sure the diaphragm does not leak as that is another source of a failed disa valve. If it in fact passes the diaphragm test I would not hesitate to rebuild it with the GAS kit.
Good point tttomttt. Will check it out
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Old 07-05-2020, 08:34 AM
u.nanimous u.nanimous is offline
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My son installed the GAS kit as part of the $400-ish of parts on his $800 project 2001 330xi. A few months later the car was given to his older sister who has since put well over 10k miles on it. That full story is posted around here somewhere.

The GAS kit has been THE recommendation for years, pretty sure it has mention in an old DISA thread started by Blubee (E39 foruum), I believe the key word was grenade.

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Old 07-05-2020, 09:33 AM
meinbills meinbills is offline
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Yes, I installed the GAS kit on my 325Ci. Looking at the X8R kit, it seems to be similar to the GAS kit in design so I think it would be OK as well. However, since we took the plunge for you and used the GAS kit already and have no problems, why do you want to be the trailblazer on the X8R?
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Old 07-05-2020, 10:31 AM
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TheHockeytowner TheHockeytowner is offline
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I installed G.A.S. DISA flap kits on my 525i and 330Ci. Highly recommend this kit, Gary does great work.
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Old 07-05-2020, 12:40 PM
cn90 cn90 is online now
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Another vote for G.A.S. rebuild kit for M54...

- We have three (3) M54 engines at home, and all 3 have G.A.S. rebuild kit installed.

- As long as the vacuum diaphragm of the DISA is OK, then you can rebuild using G.A.S. kit.

My recommendation:
1. At 100K, rebuild using G.A.S kit.
2. At 200K check the diaphragm, if bad, new Genuine BMW DISA.

Repeat the cycle every 100K...
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Old 07-07-2020, 08:18 PM
Fifty150hs Fifty150hs is offline
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Quote:
Originally Posted by cn90 View Post
Another vote for G.A.S. rebuild kit for M54...

- We have three (3) M54 engines at home, and all 3 have G.A.S. rebuild kit installed.

- As long as the vacuum diaphragm of the DISA is OK, then you can rebuild using G.A.S. kit.

My recommendation:
1. At 100K, rebuild using G.A.S kit.
2. At 200K check the diaphragm, if bad, new Genuine BMW DISA.

Repeat the cycle every 100K...
I put the GAS kit in my E53. Great kit. I have over 250,000 miles now and the DISA diaphragm is fine.
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Old 07-08-2020, 06:43 AM
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TheHockeytowner TheHockeytowner is offline
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Quote:
Originally Posted by cn90 View Post
My recommendation:
1. At 100K, rebuild using G.A.S kit.
2. At 200K check the diaphragm, if bad, new Genuine BMW DISA.

Repeat the cycle every 100K...
cn gives good advice here but I offer an alternative: you can replace the vacuum diaphragm.
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Old 07-08-2020, 06:57 AM
rav31 rav31 is offline
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Quote:
Originally Posted by TheHockeytowner View Post
cn gives good advice here but I offer an alternative: you can replace the vacuum diaphragm.
Never heard of replacing the diaphragm before. Where do you get it & how to replace it. Interesting idea.
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Old 07-08-2020, 08:43 AM
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TheHockeytowner TheHockeytowner is offline
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Originally Posted by rav31 View Post
Never heard of replacing the diaphragm before. Where do you get it & how to replace it. Interesting idea.
The large auction site has them, but I picked mine up from a Russian supplier when I bought a replacement OFH check valve. It's worth a google at least.

The biggest challenge is not breaking the DISA when removing the vacuum membrane "cover" or whatever you like to call it. AFAIK it's also only for Genuine BMW DISA valves and not parts like Uro, etc.
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Old 07-13-2020, 04:04 AM
SteveEdgerton SteveEdgerton is offline
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If your diaphragm is leaking G.A.S. Did offer a DISA that already had their kit installed.
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  #19  
Old 07-16-2020, 11:03 PM
yoheezie yoheezie is offline
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Definitely make sure the DISA still has a good diaphragm. I'm waiting on some diaphragms from Russia. Once I do get them in, I'm going to replace the diaphragm on my DISA and use a donor DISA to harvest a cap. The way they're built, you can put the cap on the diaphragm, but once it's on, it's on... I'm HOPING that I can use a donor to harvest that cap by going nuts with a Dremel. When the time comes, I'll post my progress.
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