Intake Manifold Carb Bolt Issue

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Feb 8, 2015 | 04:07 PM

hickokcpa

Thread Starter

Heel & Toe

Joined: Jun 2014

Posts: 20

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From: McKinney Texas

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!

Feb 8, 2015 | 04:30 PM

'75

Le Mans Master

Joined: Dec 2007

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From: McHenry Illinois

It should work well, the carb bolts don't need to be very tight anyway.

Feb 8, 2015 | 04:33 PM

hickokcpa

Thread Starter

Heel & Toe

Joined: Jun 2014

Posts: 20

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From: McKinney Texas

Thank You! Just wanted some reassurance.

Feb 8, 2015 | 09:05 PM

Calo69

Drifting

Joined: Sep 2014

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From: Long beach NY

St. Jude Donor '15-'16, '18

Quote:

Originally Posted by hickokcpa

Thank You! Just wanted some reassurance.

You can always just re tap the thread one size larger

Feb 8, 2015 | 09:21 PM

The13Bats

Race Director

Joined: Mar 2003

Posts: 11,608

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From: Eustis ( Area 51 Bat Cave ) Fl

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

Feb 8, 2015 | 09:52 PM

my 76 ray

Melting Slicks

Joined: Mar 2007

Posts: 2,520

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From: Hinckley OH

Quote:

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.

Feb 8, 2015 | 10:11 PM

hickokcpa

Thread Starter

Heel & Toe

Joined: Jun 2014

Posts: 20

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From: McKinney Texas

Thanks for the advice!! Appreciated as always.

Feb 9, 2015 | 12:01 AM

Shark Racer

Race Director

Joined: Jan 2000

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From: San Jose CA

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.