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Old 06-27-2005, 01:58 PM
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Need good radiator hose sealer

I can't seem to get a water tight seal on the top radiator hose of the rat project. This is the point at which the top hose attaches to the 1 1/2 copper pipe which then runs to the rear mounted radiator. I think the problem is that the copper pipe has no "lip" or "ridge" at the end for the hose clamp to seal against. It's just too smooth. I've tried double clamping it as well as trying Permatex High temp RTV silicone and Rutland high heat silicone. The bottom hose seems to have sealed okay (at least for the moment) with just a simple clamp but the top one just won't stop leaking. Any ideas?

Dewey

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Old 06-27-2005, 02:03 PM
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1st, ditch the silicone. Use some 80 grit sandpaper to ruff the copper up and clean and rough the hose up on the inside so fresh rubber with no silicone can make contact.

Are the hoses the same size or is the rubber hose too big?
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Old 06-27-2005, 02:29 PM
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A T-Bolt is a good style clamp and should help with your proble.They have a large pressure area and do not look bad either.Actually they look and seal alot better than conventional worm gear style clamps.Check the T-Bolt style
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Old 06-27-2005, 08:11 PM
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Copper Pipe with No Lip:

Solder on a ridge like Willys36 did:

Go down to entry #131


Best of luck, Ed. www.edgesz28.com
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Old 06-28-2005, 07:00 AM
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Thanks guys. I'm off to the shop to try those tips. And Edge, I should have remembered that trick Willys used. I read those entries in his journal 3-4 times. I think my brain must be dropping off from 12 volts to 6 volts.
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