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Old 01-09-2025, 06:32 PM   #1
400A
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Default 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?
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Old 01-09-2025, 07:25 PM   #2
nkaminar
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Default Re: 31 Eaton radiator cap
Photos would help.
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Old 01-09-2025, 09:43 PM   #3
J Franklin
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Default Re: 31 Eaton radiator cap
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Old 01-10-2025, 10:17 AM   #4
Bob Bidonde
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Default Re: 31 Eaton radiator cap
I also recommend that you add corrosion prevention to the cap.
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Old 01-10-2025, 10:43 AM   #5
400A
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Default 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.
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Old 01-10-2025, 06:54 PM   #6
Bick in New Zealand
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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.
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