The Stovebolt Site Forums The Shop Area Interiors Installing Gas Tank an AD

Hello all,

I am going to be installing my stock gas tank in my 53 3100. I am leaving it in the cab, behind the seat. I bought a Gas Tank Mounting Pad set, some years back. I believe it came from Chev's of the 40's. I have been looking at the Assembly Manual. It shows where the anti squeak pads go. I have rubber cemented them to my tank, per the Assembly Manual. There are 3 rubber bumpers that I installed in the 3 holes for them, in the back cab supports. The question is, the kit has a two piece drain hole seal. There is one that fits in the other one. According to the Assembly Manual, that is supposed to be rubber cemented on the bottom of the tank. The Assembly Manual also shows a rubber grommet, that fits in the hole in the floor, for the tank drain pipe. Has anybody recently installed a tank, with this system? Which piece gets rubber cemented to the bottom of the tank? The outer doughnut? Or the inner portion, that has a hole the diameter of the drain pipe? If they were both supposed to be cemented to the bottom of the tank, why would it be in two pieces?

Any help or guidance would be greatly appreciated.

Thanks,
Rugo

Rugo,

I do not know if this is answer for your question, but the 1954 3100 fuel tank "drain", fuel-pickup-tube, and sender changed in design compared to 1953 and earlier trucks. In 1954, the fuel tube and sender (except for 3600) were on a single unit that was installed on the middle top of the tank.

Tim,

The tank you are describing, I believe is the one illustrated in the Assembly Manual, Section 8, Sheet 1.06. You are correct, my 53 does not have the tube coming out of the sending unit. It just has the drain, with petcock on the bottom. Hopefully, somebody has done this before me and can give me some guidance.

Thanks,
Rugo

It has been awhile since I did my tank but the large (I think the foam) donut goes around the fuel line to the petcock. There is then a small rubber grommet that the fuel gauge wire feeds through that goes in a different hole.

That's correct, Rugo.

The "reprint" Factory Assembly Manual might be labelled 47-55 (or 47-54), but it is actually from/for 54/55st.

I am beginning to think that the kit that purchased, encompasses several years of trucks. I wonder if the larger doughnut is for late 55-59 trucks. Any of you guys that have a late 55-59 truck, does your truck use that larger doughnut floor seal? I really appreciate your help.

Thanks,
Rugo

Rugo

Here's a pic of the donut as it came out of my truck with the tank. It's ~2" dia x 1" thick with a hole to fit the 1/4" NPT pipe nipple (~3/8" OD). As far as I can tell the tank has never been removed prior to me taking it out, so the donut should be similar to what you need. It's a one-piece donut.
gas tank outlet donut

Hope that helps.

Kevin,

"You the man". That is exactly what the smaller of the two piece floor seal portion of the kit looks like. I am convinced that the larger outer doughnut, which is 3" across, with a 2" hole in it, has to be for the late 55-59 trucks. I really appreciate you taking time to both write out the description and post a really nice photo. I can now proceeed with my tank install. And, yes it helps.

Thanks,
Rugo

You're welcome. I just happened to have the gas tank sitting out in the garage when I saw your post, so went and snapped a picture for you.
Happy I could help out.