DISA valve conundrum, need some second opinions please!

Joebie · 05-10-2019, 06:32 PM

Hey guys,

I recently installed a 3 stage intake manifold and when I flashed the free Bimmerlabs 330i tune I was a bit underwhelmed, so I began to investigate for problems.

What I found was that my large DISA was not closing all the way. I removed the screws holding the DISA to the IM and pulled out the DISA valve so I could see. I then actuated it with INPA and observed it not closing all the way while everything was still installed on the car.

So I ordered new DISA valves. Both of them, large and small.

Today I pull my intake manifold to swap them out and guess what?!?

Both DISA valves work perfectly on the bench after having removed them from the intake manifold.

Do I keep running them? Do I replace only the large one because its known to be finnicky? Do I replace both of them because I have the parts and the intake manifold out already?

The DISA valves weren't cheap, but knowing for sure that I've got working parts in there is at least worth something. The old DISA valves are from 2009 (if I'm reading the date codes on them right).

Just looking for some second opinions, what would you do?

hassmaschine
Biginboca

6ixSpd · 05-10-2019, 10:22 PM

If you can afford to replace both right now, it's worth not having to do this job again in the near future once it fails.

FYI the smaller DISA is a steal on this eBay listing. It's an authentic Vaico one. I grabbed it as a backup myself.
https://rover.ebay.com/rover/0/0/0?m...2F152577895911

Joebie · 05-10-2019, 10:47 PM

Quote:

Originally Posted by 6ixSpd

If you can afford to replace both right now, it's worth not having to do this job again in the near future once it fails.

FYI the smaller DISA is a steal on this eBay listing. It's an authentic Vaico one. I grabbed it as a backup myself.
https://rover.ebay.com/rover/0/0/0?m...2F152577895911

Yeah, I'm leaning towards just putting the new ones in and maybe selling the old functional one. Then also if/when i sell the car i can probably get good money for my 3IM with fresh DISAs in it because i could just get new ones from FCP.

juld0zer · 05-18-2019, 04:47 AM

Could the green rubber seals have swollen over time, causing the flap to get stuck in the frame once the valve assembly is installed inside the manifold? They are supposed to be an oil compatible material but all the used ones i have seen have missing chunks

05-10-2019, 06:32 PM	#1
Joebie Grandmaster 768 Rep 798 Posts Drives: 2018 ///M2 6MT Join Date: Dec 2014 Location: St. Louis iTrader: (0)	DISA valve conundrum, need some second opinions please! Hey guys, I recently installed a 3 stage intake manifold and when I flashed the free Bimmerlabs 330i tune I was a bit underwhelmed, so I began to investigate for problems. What I found was that my large DISA was not closing all the way. I removed the screws holding the DISA to the IM and pulled out the DISA valve so I could see. I then actuated it with INPA and observed it not closing all the way while everything was still installed on the car. So I ordered new DISA valves. Both of them, large and small. Today I pull my intake manifold to swap them out and guess what?!? Both DISA valves work perfectly on the bench after having removed them from the intake manifold. Do I keep running them? Do I replace only the large one because its known to be finnicky? Do I replace both of them because I have the parts and the intake manifold out already? The DISA valves weren't cheap, but knowing for sure that I've got working parts in there is at least worth something. The old DISA valves are from 2009 (if I'm reading the date codes on them right). Just looking for some second opinions, what would you do? hassmaschine Biginboca __________________ Daily - 2018 Alpinweiß ///M2 6MT Exec Rain/Snow/Winter - 2011 328i 6MT Sedan - Black on Black, Sport Package Sold, But Not Forgotten - 2009 135i 6MT - Black on Black, M-sport, JB4
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05-10-2019, 10:22 PM	#2
6ixSpd Save the manuals! 6015 Rep 6,746 Posts Drives: '16 M3, '23 718 Spyder Join Date: Feb 2016 Location: 416 iTrader: (4)	If you can afford to replace both right now, it's worth not having to do this job again in the near future once it fails. FYI the smaller DISA is a steal on this eBay listing. It's an authentic Vaico one. I grabbed it as a backup myself. https://rover.ebay.com/rover/0/0/0?m...2F152577895911 __________________ '16 M3 \| '23 718 Spyder Past: E92 M3, F87 M2, E39 M5, etc
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05-18-2019, 04:47 AM	#4
juld0zer Lieutenant Colonel 480 Rep 1,600 Posts Drives: Prev 135i 7DCT, Now 130i 6sp Join Date: Jul 2016 Location: 2153 iTrader: (0)	Could the green rubber seals have swollen over time, causing the flap to get stuck in the frame once the valve assembly is installed inside the manifold? They are supposed to be an oil compatible material but all the used ones i have seen have missing chunks
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