1966 gas tank install - Vintage Mustang Forums
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post #1 of 9 (permalink) Old 02-10-2018, 06:54 AM Thread Starter
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1966 gas tank install

i got the new screws Can I use Caulk for the install ai dont have $25 for the cj parts ...
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post #2 of 9 (permalink) Old 02-10-2018, 07:08 AM
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You should use 3M Strip-Calk. I don't know what the spec was for 1966, but for 67/68 it was .375" thick all around the perimeter. That's about three beads' worth.

The reason you don't want to use another type of sealant is you need to allow for the tank to be removed at least semi-easily at some future date.
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Last edited by 4ocious; 02-10-2018 at 07:12 AM.
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post #3 of 9 (permalink) Old 02-10-2018, 08:47 AM
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Originally Posted by 4ocious View Post
You should use 3M Strip-Calk. I don't know what the spec was for 1966, but for 67/68 it was .375" thick all around the perimeter. That's about three beads' worth.

The reason you don't want to use another type of sealant is you need to allow for the tank to be removed at least semi-easily at some future date.
+1. As said use the correct product for the job.
The 3M caulk strip stuff is available local at many auto parts stores such as Auto Zone.

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post #4 of 9 (permalink) Old 02-10-2018, 09:53 AM
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Use the 3M strip stuff. When I first put in my new tank, I used window weld sealant on it and then when I upgraded to a 69 tank(22) gallon. It was a struggle to get it out, that stuff is a good product but not for gas tanks or anything you might want to remove at some point. Regular "caulk" will turn "chalky and fall apart. I used the 3M strip stuff second time around and was real happy with the results. I doubled up and still had some left over. Don't forget to install the fuel tank sending wire clips before you bolt it down. Good Luck
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post #5 of 9 (permalink) Old 02-10-2018, 11:01 AM
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Anyone mention using caulk strip? LOL
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post #6 of 9 (permalink) Old 02-10-2018, 12:15 PM
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I used electrical dum dum by Ideal that comes in a wax paper or plastic wrapper

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post #7 of 9 (permalink) Old 07-18-2019, 05:05 PM
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Bringing this back from the ded, How many boxes of the 3M strip caulk do I need for a '67 gas tank?

John

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post #8 of 9 (permalink) Old 07-18-2019, 05:32 PM
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1 box will be enough and you will have some left over.
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post #9 of 9 (permalink) Old 07-18-2019, 06:36 PM
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Thanks! Amazon has it for $18.87 vs CJ for $25
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John

The Fauxstang. Dynacorn 67 fastback. Dart SHP 363, Close ratio Magnum 6 speed, 3.70 Eaton Truetrac in a fabricated full floater 9", SorT coil over suspension. Still in pieces.
'14 SHO with most all the bells and whistles. Stock for now.
F-150 SCab daily driver
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