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Intake Manifold Carb Bolt Issue

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Old Feb 8, 2015 | 04:07 PM
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Default Intake Manifold Carb Bolt Issue

Hi, after installing the intake manifold on my 73 I broke off a carburetor bolt while putting her back together. In an attempt to get the broken piece out I destroyed the threads on the intake. I used a helicoil and it appears to seat pretty well. Before I put everything back together I was wondering if anyone had an opinion on whether this is the best way to handle the issue. I would hate to get it all back together and have to deal with a possible vacuum leak only to take it all apart again. Thanks!
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Old Feb 8, 2015 | 04:30 PM
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It should work well, the carb bolts don't need to be very tight anyway.
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Old Feb 8, 2015 | 04:33 PM
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Thank You! Just wanted some reassurance.
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Old Feb 8, 2015 | 09:05 PM
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Originally Posted by hickokcpa
Thank You! Just wanted some reassurance.
You can always just re tap the thread one size larger
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Old Feb 8, 2015 | 09:21 PM
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Use studs in the intake, then a nut on the stud after the carb is in place, I do not believe it will leak, but if you want to really have piece of mind before you install the stud in the intake put some silicone sealer on it,



Stud kit
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Old Feb 8, 2015 | 09:52 PM
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Originally Posted by '75
It should work well, the carb bolts don't need to be very tight anyway.
You should check the torque specs for the carb. It isn't very high.
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Old Feb 8, 2015 | 10:11 PM
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Thanks for the advice!! Appreciated as always.
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Old Feb 9, 2015 | 12:01 AM
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Helicoils are stronger than aluminum threads, and less likely to seize.

As long as the helicoil is below the mounting pad and you didn't drill through the intake installing it, vacuum leaks will not be a concern.
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Old Feb 9, 2015 | 12:45 AM
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Originally Posted by Shark Racer
Helicoils are stronger than aluminum threads, and less likely to seize.

As long as the helicoil is below the mounting pad and you didn't drill through the intake installing it, vacuum leaks will not be a concern.
I agree, should work fine... just use a quality gasket.
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