Technical Firewall Grommets

Have any of you made your own Grommets for wiring, etc through a firewall ?
Molded silicone or polyurethane?
These 2 from the '40 Chrysler are slightly used and I'd like to make new ones. IDK if repops are being made...can't seem to find any.



The one on the left is for hand throttle, choke and something else (CRS).
The one on the right is for the emergency brake cable; the hole is at an angle; maybe 45º
The main wiring bundle is to the left of these (driver's view) and may need replacement as well.

If anyone has ideas, I'd like to hear.

Thanks
gatz

 

this one might work for the big one

https://www.steelerubber.com/firewall-grommet-40-0223-21

and there are lots of other grommets available,

https://www.steelerubber.com/firewall-grommets

is a big list. And you can click on "matching vehicles" to see what they fit.

But no, I've never tried molding my own. I'm way too lazy for that.

 

Have you looked at what Steele Rubber has to offer,the link is to 40 Chrysler but look at the other GM rubbers also, there may be something similar. HRP

Steele

 

Mc Master and Carr

 

Nice find.. Steele has a lot of great stuff. I needed new grommets on my Ford firewall, so I ganged a few of them up on an aluminum-sheet plate which I pop-riveted to the firewall.

 

I have made them from a 3/8" sheet rubber, a hole saw, and a hack saw and grinder to round over the edges. Drill or cut out the outside diameter with the hole saw or hack saw first, then use a smaller hole saw for the inside diameter. Cut the slot in the outside diameter with a hack saw, then round over the outside edges with a bench grinder. This mainly works for the bigger round or big odd shaped grommets with multiple holes in them.

 

A good parts store, Kantor Brothers, maybe home Depot/Lowe's might have them in electrical department.

 

Really i try not to run any wire through the firewall. Steele rubber is where i get the stuff i use. Usually go out right next to the dimmer switch or the bottom of the steering column, put a boot around column and its almost invisible.

 

I'm using one of those Mopar firewall grommet things on my T coupe for my choke cable, heater control cable and speedo cable. Just a great piece, wish someone would reproduce them. I'm still using the original 70 year old rubber.

 

I believe Vintage Power Wagons has those- also used on trucks.
https://www.vintagepowerwagons.com/online-parts-catalog
Go to section 24. It's on the 3rd page of that section.

 

Those are very easy to make from sheet stock.

 

That's 1939 Chevrolet- https://www.steelerubber.com/firewall-grommet-60-0010-45

 

I was wondering if you could use Sugru epoxy for some of the out of sight wires/cables. The stuff is supposed to remain flexible and is waterproof.

 

Thank you. Learned something new.

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