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      01-17-2018, 10:44 AM   #1
desertman123
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DIY: How to CORRECTLY open your DISA valve for rebuilding



Do you suffer from a weak or even floppy shaft? Is your performance... lacking? Well gentlemen, it is 2018 and we have solutions to this problem. No need to buy expensive supplements, because we can make work what we were already blessed with!

I've seen too many people hack up their DISA valve trying to take them apart for rebuilding. This gets plastic bits everywhere, and makes it a pain to glue the unit back together, on top of risking cutting into the motor/circuit board. Here's the EASY way to perfectly disassemble the unit. No need to spend $$$ on a brand new DISA.

What you'll need for this job is:
• multiple 1 sided razor blades, must be somewhat rigid. Box cutter blades work well
• hammer/mallet
• (not necessary but recommend) vice to hold DISA
• patience
• protection, we will be hitting a razor blade with a hammer


If you look closely you can see that the DISA is actually multiple pieces, bonded together from the factory. We will be cutting along this line.


Find a corner where you can clearly see the pieces separate. Place your razor blade along this line and start tapping. Don't be afraid to give it a decent tap, but don't brute force it. The razor WILL start sinking into the seam. Tap until you feel the razor is decently into the valve. You can see in the picture about how deep you want to go.



Now just slowly and meticulously follow the seam, tapping the razor blade in. Be careful, but you'll quickly get an idea of how much pressure you should apply. It's easiest to pop open each corner, then move towards the flat parts of the seam. Don't try to cut too much of the seam at once, don't wanna crack the plastic or break the razor. You can see a broken blade on the left




That's it! Now continue with your DISA rebuild.
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      01-17-2018, 12:51 PM   #2
drunkenup
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I have a code for my big DISA and with 100k its probably overdue for the rebuild. Which kit are you using for the rebuild?

Did you notice any driveability issues? My engine gets all jerky when I lift or tip in the throttle. I also suspect the DISA got stuck on a very cold day when the jerkiness went away and the intake noise was amplified
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      01-17-2018, 04:30 PM   #3
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Quote:
Originally Posted by drunkenup View Post
I have a code for my big DISA and with 100k its probably overdue for the rebuild. Which kit are you using for the rebuild?

Did you notice any driveability issues? My engine gets all jerky when I lift or tip in the throttle. I also suspect the DISA got stuck on a very cold day when the jerkiness went away and the intake noise was amplified
There's a kit for both the large and small DISA on ebay, I just ordered that.

Haven't installed the manifold yet - I imagine the X3 that this came off of wasn't running to well considering all the oil in the intake and this flap is sheared.
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      01-26-2018, 02:47 PM   #4
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This'll come in handy when my newfound DISA's inevitably give in.
You're a star of humor...
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      02-24-2018, 02:30 PM   #5
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Thoughts on what you're using to glue the cap back to the rest of the disa?
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      03-18-2018, 11:18 AM   #6
desertman123
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Quote:
Originally Posted by drunkenup View Post
Thoughts on what you're using to glue the cap back to the rest of the disa?
I used black JB weld. High temp, oil resistant and says it bonds to plastic.

A few months later I have not had any issues.
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      06-06-2018, 10:41 PM   #7
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Here's my new problem:

https://photos.app.goo.gl/PrgWs7Ap5gjU8YJC2

I assume that this means it's rebuild time

What rebuild kit did you use, good sire?

EDIT: It's the Upper DISA, above the TB, the one that's easily accessed...
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      06-07-2018, 10:20 AM   #8
desertman123
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Quote:
Originally Posted by chris_flies View Post
Here's my new problem:

https://photos.app.goo.gl/PrgWs7Ap5gjU8YJC2

I assume that this means it's rebuild time

What rebuild kit did you use, good sire?

EDIT: It's the Upper DISA, above the TB, the one that's easily accessed...
https://www.ebay.com/itm/Aluminium-R...ss!32174!US!-1

Same kit as VANOS-BMW.com but it won't take a month and a half to come from Moscow. You could probably just go pay the guy a visit to skip shipping lmao.

I wanna pull my valve and double check one of these days but everything been running great lately.

And I can confirm that as of today, in June, my DISA is still JB welded together without issue.
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