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how to secure silicone intake hose
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05-07-2012, 07:38 PM | #1 |
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how to secure silicone intake hose
OK, my silicone intake hose (vishnu pwm version) just popped out while i was doing 18psi.
it's been a year since i installed it and it's been through some abuse, not sure why it decided to pop out now. since i'm going to have to remount it, what do you guys do to prevent this sort of things? i hate to over tighten the T-clamps for fear that it'll crush the throttle body. do these things slowly edge out till it pops out? do you guys check it every so often? i usually inspect my engine bay and it didn't look out of norm yesterday. any tips/tricks are welcome. |
05-07-2012, 08:47 PM | #3 |
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An old school trick is to completely clean the metal and coupling. Then spray hairspray on it and quickly put it back together. It will hold and can still be removed at later time.
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05-07-2012, 10:39 PM | #4 |
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hm, hair spray, what an idea. if it pop out again, i'll try it.
i just tested it to 18psi, it's holding (so far). but i hope i never have to use my emergency road side kit on the side of a highway. |
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05-07-2012, 10:43 PM | #5 |
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Probably just due to oil exposure to the silicon coupler over time.
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05-07-2012, 10:48 PM | #6 |
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The hairspray trick is hit and miss. I've never really seen it work, but I can't speak to the manner of how well it was prepped. On my buddie's camaro the only thing that ever really worked, as far as keeping the piping secured to the FMIC, were high quality t-bolt clamps.
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05-08-2012, 09:39 AM | #7 |
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Mine popped off yesterday too, fortunately it still drives like that, you just can't hit any boost.
I think mine slipped off due to oil as well. My idea if it happens again, is take a dremel tool to the bottom of the clamp and make it abrasive, so when it clamps down, it's less likely to slip. Makes sense right? Hope it works
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2009 e90 LCI Blacked Out Space Gray - Vishnu Procede 2.5 w/9-10 Aggressive Map Stg2 - PWM Meth (80%) - BMS DCI - VRSF Intercooler - VRSF Downpipes - HKS Cat-back Exhaust
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05-08-2012, 09:52 AM | #8 |
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i think the main problem is the silicone on metal surface (the throttle body), not the silicone to clamp.
the throttle body has some grooves for the OEM intake, i wonder if we can use that to our advantage. |
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05-08-2012, 09:56 AM | #9 |
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Clamp over the grooves so that the silicone under the clamp will bite into them a little. The hairspray trick also works wonders.
What about a turn of friction tape or silicone hose repair tape on the throttle body? The adhesive will keep it in place and the coupler will have a much harder time slipping off. |
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05-08-2012, 10:28 AM | #10 | |
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Quote:
Last edited by Orb; 05-08-2012 at 10:40 AM.. |
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05-08-2012, 11:34 AM | #11 |
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if i'm not mistaken, the hose is reinforced (i don't know by what material), but you can see the reinforcement on the cross section.
do you have any link to vendor selling these specialized silicone hoses? |
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05-08-2012, 11:52 AM | #12 | |
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Samco makes fluro hoses but they are not cheap (about $100 each). I did find one vendor who makes a 2.5" coupler at $15 each and they do have other sizes. This is a fluro lined hose. http://www.pacificp.com/store/index....roducts_id=329 |
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05-08-2012, 12:08 PM | #13 |
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05-08-2012, 12:33 PM | #14 |
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The hose wants to blow from the pressure which is the least path of resistance. The clamp purpose is to counter those forces. It is not possible for a clamp to make a full seal under any circumstances. If the hose has expanded due to oil contamination it will require a much higher clamping force that may leak at higher boost levels regardless and may not throw a code. I had this problem and now solved. There is not much to debate as this is a very well know issue that is mostly ignored by the aftermarket. One will need to do their own research to validate my comments instead of making assumtions.
Last edited by Orb; 05-08-2012 at 03:57 PM.. |
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05-08-2012, 12:41 PM | #15 | |
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05-08-2012, 03:21 PM | #16 | |
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05-08-2012, 04:02 PM | #17 |
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05-08-2012, 04:22 PM | #18 | |
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It ends up be being cheaper just replacing the hoses than chasing down the issue. I never threw a code so people shouldn't expect one. The problem has been ongoing for some time as it was only leaking at higher boost levels. The silicone hose will leak at some point (for everyone) and you will be able see fresh oil vapor at the leak point. You will notice turbo lag, flat power delivery, minor boost oscillations and 5-15% reduction in gas mileage that seems to happen all of sudden then gets worse. |
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01-29-2013, 07:05 PM | #19 |
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Confused by the link provided
Orb,
The link you provided shows short little couplings, not an entire hose. My 335i just popped it hose from the throttlebody under hard acceleration and after reading your comment Im looking to upgrade the hose. So what is it from that link I need to order exactly? Thanks a lot in advance!! |
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