simple question...

D

Dana Bennett

PCS Life Member
...and I'm sure someone will have a simple answer!!

Starting to work on the '76 Superior Cadillac.
One of the first things will be to finish doing the wiring for the gauges that I started to install several years back. It's the typical three gauge set, electric even though I would have prefered mechanical.
My question concerns with where the wires pass thru the firewall. The place I am using (unless someone suggests a better location) is a square opening in the firewall that is aprox. 1/2"x1/2"?? and is located about the middle of the firewall center of the car. I do not know what this opening was intended for (if anything) and it was open with no plug or anything in it.
I would like to run my wires through this opening but know that I can't just leave it that way.
I would like to put some type of gromet in the opening but the opening is square!!

What can I use and where can I get it??

Thanks!
Dana Bennett
Forestville, New York
 
I have had some luck using old weather stripping (automotive door gasket), it is more rectangular but it will fill the hole a little and secure with some 3M mastic for rubber (Black) and let it cure then pull the wires through.
 
wiring that Cadillac

Dana,
Check all you wires for length. Then check the routing you want to use to make sure the wires are long enough. You should be able to find a rubber grommet at any good auto paint store. The ones here sell trim clips, door panel fasteners, and a lot of the small bits you need when putting something back together after painting. Some hardware stores will have a small selection of rubber grommets too. If that hole is square it is possible it was a locator hole for placing the firewall blank into the press. We used locator holes on several of the parts we built in house. Other parts we used a stop pin. Just slide the part to the pin and then hit run on the press control.
Whatever you do use some kind of insulator or cushion on those wires as they go through the firewall.
Mike
 
any of the round ones big enough will push into the square shape and stay. a dap of black sealer in the corners will keep it in place. what you looking at is most likely a superior cut pass threw. they would run the control cables and wiring threw the center and just leave the hole open.
 
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