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Need some ideas to fix a broken ls6 intake(back part) for boost

 
Old 11-04-2016, 01:09 AM
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Default Need some ideas to fix a broken ls6 intake(back part) for boost

Ive looked around and seems common enough that people are just jb welding it back in place but They arent boosted.

I need it to hold 20+ psi and i need some ideas




The only thing i can thing off is grind out the right side where the crack is to stop any hairline crack. Then grind everything flat.
make an aluminum(or some sturdy material) plug thats the same shape as the end hole and same thickness as the intake on the back side.(this will serve as a spacer)

Make TWO the same shape as the plug(out of a thin aluminum) but acouple cm bigger all around(this will serve an an anchor. one for the back and one for the front.
use a gasket or gasket sealer all around and use a bolt all around to hold in place.

I would of course tap that plug for brake booster port and map port.

same concept as those dry wall anchor.




what do you guys think? good idea or is there a simpler method.
Im not really worried about hacking this intake up since this is already "trashed" its also a swap do i dont need to "match" vacuum ports/map holes etc.
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Old 11-04-2016, 06:51 AM
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I think you would have more luck using some type of two part epoxy to glue the vacuum port back on.
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Old 11-04-2016, 08:12 AM
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3m 8115 will work good for that repair. its a 2 part panel bonding adhesive.
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Old 11-04-2016, 02:10 PM
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you guys think the adhesive would be strong enough for boosted?
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Old 11-04-2016, 02:13 PM
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The 3M 8115 would be strong enough
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Old 11-04-2016, 02:14 PM
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Old 11-04-2016, 02:21 PM
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I did see that and another one that some guy did really nice.
but they werent boosted.


Originally Posted by bigdaddy350 View Post
The 3M 8115 would be strong enough
Thanks ill look into this. I guess i can try gluing it back together first before hacking into it
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Old 11-04-2016, 02:28 PM
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I'd do the adhesive over mechanical fasteners. more holes are more stress risers to cause more cracking.

Panel bond will tear steel like paper if applied correctly.
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Old 11-04-2016, 04:37 PM
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As dumb as it sounds I did the same thing with my intake. i knocked that part out as I didn't have clearance to my firewall, used degreaser and cleaned the intake in and out, put 2 part expoxy all over, put in a freeze plug to fill the hole and smoothed it all out.
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Old 11-04-2016, 05:08 PM
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i pulled mine out epoxied a feeeze plug in it i ordered two freeze plugs the exact size of the hole and i drilled and tapped the freeze plug for a 3/8npt fitting works great have seen 18psi numerous times no issues if u want the freeze plug i ordered extra p.m. me ill let u have it
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Old 11-04-2016, 05:58 PM
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Or just replace the intake ?
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Old 11-04-2016, 09:03 PM
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Aren't these intakes made of Dupont nylon? You should be able to plastic weld that pretty easily.
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Old 11-04-2016, 09:11 PM
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plasti-Weld FTW

Add: I could see an NPT helping the situation as the tapered thread increases preassure on the plug... Like pounding in a wedge or tapered plug. A bushing with a lip (if you could get the bushing lip on the inside so the manifold pressure would force the lip against the inside of the manifold) would possibly be my preference in this situation in combination with an epoxy as mentioned above.

Last edited by gtfoxy; 11-04-2016 at 09:25 PM.
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Old 11-05-2016, 06:44 AM
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My first thought was panel bonding stuff, cars get in wrecks and the panel is still bonded-getting ready to put a new roof skin on my truck with that stuff
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Old 11-05-2016, 09:13 AM
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autozone sells black plastic weld epoxy and it will not leak if it does ill buy u a new intake u can take that to the bank friend my intake does not leak neither does the threads where i tapped the npt fitting ive seen the amount of boost u are trying to run mine held fine
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Old 04-30-2017, 12:41 AM
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Bumping this to see if you ever repaired it and if so how it held up. Looking to possibly do a repair on an LS6 intake to hold boost as well.
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