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tb boost leak....help needed

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Old Feb 11, 2013, 04:43 PM
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tb boost leak....help needed

Did a boost leak test and found massive leak from the place circuled in the picture. Can someone help me out at how to fix it and explain what this part is doin?
Old Feb 11, 2013, 08:11 PM
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Looks like the iacv but not
Old Mar 29, 2014, 08:14 PM
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Bump, I also just found a big leak here. Any suggestions on this?
Old Mar 29, 2014, 08:15 PM
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Replace the O Ring. Undo the screw and a little plug will pop out. The O ring dries up and doesn't seal worth a ****. You should probably do shaft seals and the BISS O ring while you're at it. They all leak.
Old Mar 29, 2014, 08:59 PM
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Ok. Where can I find this O-ring? From what I've read in the last hour, it's an unconventional size and hard to obtain at regular. Has anyone else bought just this o-ring, and if so, where?
Old Mar 29, 2014, 09:18 PM
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Originally Posted by Thoe99
Ok. Where can I find this O-ring? From what I've read in the last hour, it's an unconventional size and hard to obtain at regular. Has anyone else bought just this o-ring, and if so, where?
Contact Mil Spec or Buschur or MAPerformance and they should be able to help you out. I think Mil Spec sells the o-ring seal, check out their website, www.mil-spec.org
Old Mar 29, 2014, 10:49 PM
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I believe its called the "IAC warm-up flapper valve o-ring"

Should be able to get it from any oem parts website
Old Mar 30, 2014, 08:42 AM
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Is this it?

http://www.streettunedmotorsports.co...ller_oring.htm
Old Mar 30, 2014, 09:01 AM
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i had a similar leak there and also added high temp silicone sealant to help. The oring is not impossible to find, i believe i got mine from a generic assortment from a local autoparts store
Old Mar 30, 2014, 09:55 AM
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Originally Posted by Thoe99
No thats the o-ring that goes around the IAC assembly
Old Apr 28, 2014, 09:31 PM
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I found a set of o-rings that Home Depot sells that works. Held 25psi in a boost leak test perfectly fine:

http://www.homedepot.com/p/DANCO-40-...6754/100579460 (the real ones do not look like the donut that the image depicts)

I'm not sure how long it'll last since it's made for faucets, but I have yet to find the right size anywhere else.
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