The Stovebolt Site Forums The Shop Area General Truck Talk Speedometer grommet and small wire harness grommet at firewall question?

Started to install these new grommets that I got from JC trucks on my 1949 3100 1/2 ton. The I.D. of the speedometer grommet is too large for the new metal speedo cable. I.D. looks to be 1/4" and the O.D. on the new metal cable is 3/16". The small wiring harness grommet at the firewall is too small for the hole in the firewall. It installs, but slides all around in the hole on the firewall. Is there any other suppliers that would have the correct size grommets?

Tim

You 'could' mix some 2-part epoxy up to fix that grommet's sliding around. The parts stores have assortments of grommets. There are also PCV valve fittings that would work, at the same parts stores. I'm sure you've seen them, but I am not omnipotent.

I've just made a few grommets cut from a 3/4" horse stall rubber mat from Tractor Supply Company. They are cut to the correct size, by me. I got tired of fooling with the parts stores' grommets, and the previously ordered grommets from vendors.

Brad

I made mine up myself in-situ. I cut a thin slice off a mastic tube about the thickness of the grommet. cut it so it opens up around the mentioned grommet, kept to size with a cable tie, and kept in place with masking tape. Then fill with black mastic, smooth out and leave overnight. Remove the next day and you have a nice new grommet covering the old on without all the hassle.
Easy.