The Ford Barn

400A · 01-09-2025, 06:32 PM

I have a choice 31 Eaton radiator cap, but it is unusable because the inside steel portion rotates within the stainless shell. Does anyone know of a reliable way to fix this?

nkaminar · 01-09-2025, 07:25 PM

Photos would help.

J Franklin · 01-09-2025, 09:43 PM

Jb-weld

Bob Bidonde · 01-10-2025, 10:17 AM

I also recommend that you add corrosion prevention to the cap.

400A · 01-10-2025, 10:43 AM

The corrosion protection is a good idea. I use POR on my gas caps and the coating lasts a few years before it begins to peel. At least whatever peels off is likely caught in the spark arrestor so no contamination of the fuel.

Bick in New Zealand · 01-10-2025, 06:54 PM

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I had a similar problem a while back. The difference was mine was on the car and I couldn't get it to release. I ended up drilling a small hole and putting a pin through it so that both parts were locked together. This was a mint Eaton, that had been restored. Now sitting on the shelf waiting for a solution.....
I am currently running a locking cap with a greyhound.

01-09-2025, 06:32 PM	#1
400A Senior Member Join Date: Apr 2023 Location: New England Posts: 191	31 Eaton radiator cap I have a choice 31 Eaton radiator cap, but it is unusable because the inside steel portion rotates within the stainless shell. Does anyone know of a reliable way to fix this?

01-09-2025, 07:25 PM	#2
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 6,857	Re: 31 Eaton radiator cap Photos would help. __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past.

01-09-2025, 09:43 PM	#3
J Franklin Senior Member Join Date: May 2010 Location: Oregon Posts: 6,586	Re: 31 Eaton radiator cap Jb-weld

01-10-2025, 10:43 AM	#5
400A Senior Member Join Date: Apr 2023 Location: New England Posts: 191	Re: 31 Eaton radiator cap The corrosion protection is a good idea. I use POR on my gas caps and the coating lasts a few years before it begins to peel. At least whatever peels off is likely caught in the spark arrestor so no contamination of the fuel.