Leaking radiator....only when parked.... - Jeep Wrangler Forum

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Old 08-11-2013, 08:41 AM   #1
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Leaking radiator....only when parked....

Hey everyone....I've got an issue i need some help with. My jeep has started leaking from the top tank of the radiator but only when parked for a day or more. It never leaks while running and does not have overheating issues. From what I can tell it is leaking where the top plastic tank attaches to the aluminum. I've replaced radiators for leaks here before but I've never seen one leak when sitting......any thoughts?

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Old 08-11-2013, 08:43 AM   #2
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Forgot to mention......I have put a pressure tester on it and it holds just fine when warm......haven't gotten a chance to try it cold yet.

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Old 08-11-2013, 11:00 AM   #3
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Are you sure its not leaking from around the cap and just settling at the joint between plastic and aluminum. I had that happen on a different vehicle once. Just a thought!
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Old 08-11-2013, 11:43 AM   #4
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sounds like your tanks are leaking. Mine did the same thing. only dripped when it cooled down. expansion and contraction rates of different materials.
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