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Old 05-14-2016, 04:45 PM   #1
66clow
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Firewall holes

What are you all doing to plug holes in the firewall? Where can you get a variety of plugs?

Thanks

Also what covers this hole? Under the Wheelhouse.


Last edited by 66clow; 05-14-2016 at 04:52 PM.
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Old 05-14-2016, 05:27 PM   #2
LockDoc
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Re: Firewall holes

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This is what goes there. They are a 7/16" bolt, 1-3/4 inches long, with a 2-1/4" integral washer on it.

LockDoc

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Old 05-14-2016, 07:03 PM   #3
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Re: Firewall holes

Quote:
Originally Posted by LockDoc View Post
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This is what goes there. They are a 7/16" bolt, 1-3/4 inches long, with a 2-1/4" integral washer on it.

LockDoc

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Awesome thanks
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Old 05-14-2016, 09:52 PM   #4
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Re: Firewall holes

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Awesome thanks
No problem. If there is a pretty good size gap between the inner panel and the cab brace this is the type of shim that goes in there.

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Old 05-14-2016, 10:21 PM   #5
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Re: Firewall holes

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No problem. If there is a pretty good size gap between the inner panel and the cab brace this is the type of shim that goes in there.

LockDoc
I noticed one side was touching and the other had a quarter inch gap.
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Old 05-14-2016, 10:50 PM   #6
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Re: Firewall holes

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Originally Posted by 66clow View Post
I noticed one side was touching and the other had a quarter inch gap.
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The shims are almost a 1/4 inch thick.

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Old 10-20-2020, 09:02 PM   #7
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Re: Firewall holes

I see this is a old post, I have these shims and was wondering where they go!

Thanks
Steve
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Old 10-20-2020, 11:48 PM   #8
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Re: Firewall holes

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Originally Posted by Tripmiester View Post
I see this is a old post, I have these shims and was wondering where they go!

Thanks
Steve

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Sometimes they fall out when disassembling the front clip and people have a hard time figuring out where they came from.....

Not every truck has them and there will usually be a different number of them side to side.

Here is a picture of where the bolts with the large washer go. The "F" shims go between the inner panel and this cab support rail. The shims are made that way so you can start the bolt, then hook the shims over the bolt and they won't fall out while you are tightening the bolt.. The inner panel has a good size square hole in this location.

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Last edited by LockDoc; 10-21-2020 at 10:22 AM.
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Old 10-21-2020, 07:33 AM   #9
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Re: Firewall holes

So right here?

Sorry the last post was supposed to be a question mark not a exclamation point.

Steve
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Old 10-21-2020, 10:20 AM   #10
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Re: Firewall holes

Quote:
Originally Posted by Tripmiester View Post
So right here?

Sorry the last post was supposed to be a question mark not a exclamation point.

Steve

Yes, that is the bolt with the big washer.

LockDoc
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http://67-72chevytrucks.com/vboard/s...d.php?t=829820

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