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Old 02-08-2020, 03:46 PM   #1
dcminiman_43
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DISA Question

About to Install a New DISA And was curious with how the OG O-Ring is, once I install it, am I able to Remove And re install again for inspection or other repairs are needed that involve its removal? Only because I've seen on some sites that it's a one and done deal once install, can't be installed again because of the material the O-Ring is made of.

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Old 02-08-2020, 04:11 PM   #2
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Quote:
Originally Posted by dcminiman_43 View Post
About to Install a New DISA And was curious with how the OG O-Ring is, once I install it, am I able to Remove And re install again for inspection or other repairs are needed that involve its removal? Only because I've seen on some sites that it's a one and done deal once install, can't be installed again because of the material the O-Ring is made of.
Scrape it off and get an actual o-ring. That's what most of us have done. Just do a good job removing the old.
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Old 02-08-2020, 04:25 PM   #3
dcminiman_43
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Originally Posted by cvx5832 View Post
Scrape it off and get an actual o-ring. That's what most of us have done. Just do a good job removing the old.
Would it come off alot easier being a brand new DISA? I do have a Viton O-Ring that fits the 2.5 DiSA laying around.

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Old 02-08-2020, 06:00 PM   #4
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Dental picks work great for getting out the old O ring. Clean out as much as you can, the cleaner the better, carefully so as not to damage the plastic surface. Replacement O ring is fairly cheap. Advance auto parts (part # 35489) same as water outlet O ring for a 91-94 Ford Probe.
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Old 02-08-2020, 06:17 PM   #5
dcminiman_43
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Dental picks work great for getting out the old O ring. Clean out as much as you can, the cleaner the better, carefully so as not to damage the plastic surface. Replacement O ring is fairly cheap. Advance auto parts (part # 35489) same as water outlet O ring for a 91-94 Ford Probe.
Newbimer it's a brand new DISA, I have an extra viton O-Ring from a kit I used in a previous DISA , was seeing if it be easier to pull off

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Old 02-08-2020, 06:58 PM   #6
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Originally Posted by dcminiman_43 View Post
Newbimer it's a brand new DISA, I have an extra viton O-Ring from a kit I used in a previous DISA , was seeing if it be easier to pull off

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If it's a new disa, then just use it as is. You don't want it easy to pull off or put on, that's a sign of a bad seal. The resistance means its sealing well. Keep the extra o ring in case the new one develops a leak from being removed and installed again, but I doubt that would happen anytime soon.
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20mm OD x 12mm ID x 4mm W : Viton O-Ring
3/4" OD x 1/2"ID x 1/16" Thick : Thrust Bearing/Washer

Last edited by LeverThis; 02-08-2020 at 06:59 PM.
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Old 02-08-2020, 06:39 PM   #7
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Originally Posted by Newbimer View Post
Dental picks work great for getting out the old O ring. Clean out as much as you can, the cleaner the better, carefully so as not to damage the plastic surface. Replacement O ring is fairly cheap. Advance auto parts (part # 35489) same as water outlet O ring for a 91-94 Ford Probe.
Avoid using picks that are too sharp because you don't want to damage the plastic housing. The cheap small pick set at Harbor Freight is all you really need, or even a small screwdriver if carefull. The original is like a hard silicone rtv, you might need something sharp initially to cut into it to make a start, but once you get an opening a duller tool is safer.

Fwiw, check out German Auto Solutions for a quality DISA o-rings sized correctly for a 325i.
https://germanautosolutions.com/stor...ousing-o-ring/

Newbimer, did that Ford water pump oring work? I've read both positive and negatives about that approach.
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20mm OD x 12mm ID x 4mm W : Viton O-Ring
3/4" OD x 1/2"ID x 1/16" Thick : Thrust Bearing/Washer

Last edited by LeverThis; 02-08-2020 at 06:51 PM.
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Old 02-08-2020, 07:14 PM   #8
dcminiman_43
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Originally Posted by LeverThis View Post
Avoid using picks that are too sharp because you don't want to damage the plastic housing. The cheap small pick set at Harbor Freight is all you really need, or even a small screwdriver if carefull. The original is like a hard silicone rtv, you might need something sharp initially to cut into it to make a start, but once you get an opening a duller tool is safer.

Fwiw, check out German Auto Solutions for a quality DISA o-rings sized correctly for a 325i.
https://germanautosolutions.com/stor...ousing-o-ring/

Newbimer, did that Ford water pump oring work? I've read both positive and negatives about that approach.
I have a Viton O-Ring, just everything on this car is 16yo, and never did this or lower intake boot and both look so intimating and one of those scenarios that if I'm off on something when I replace there goes my mode of transportation I'm really nervous about the pin that holds the flap

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Old 02-09-2020, 02:15 AM   #9
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I havenít read the entire thread but hereís my observation: the original orange o ring will definitely flatten over time. The GAS o ring will not.

How do I know? I had a GAS blue fluoro-silicone installed for a few years. When I removed the DISA the GAS o ring was just as springy as when new.


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