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Aluminum Radiator Leak?

Martinld123

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What could make a radiator leak one day then not the next time I start up the car three months later? Three months ago just be before we left on a trip I noticed about half cup of Antifreeze under the radiator and could see wet area on fins starting near the top and dripping off the bottom. I just went out yesterday in 30 degree F temps to look for leak after I got car up to 170 degrees. No leak. Is it just my lucky day or what, lol? Thanks Marty
 
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Martinld123

Martinld123

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Martin--

Go here: https://www.allpar.com/forums/threads/a-radiator-that-leaked-then-didnt.159264/

If it is a possibility for it to happen on other cars it is a probability that it will happen on a Healey.

Thanks for help. I did some detective work talking with a radiator shop. He said that aluminum heats at a different uniform rate so if you run a car for shorter period of time you may not get a leak because not all of radiator gets up to the same temperature. I think he said copper dissipates heat at faster rate than aluminum but aluminum's advantage is it is much lighter. So will be taking in for repairs. Marty
 

Keoke

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Martin
Sounds like there is a small physical rupture n the radiator that closes after it warms up ?
 
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