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Old 03-12-2019, 01:52 PM
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andrewwynn andrewwynn is offline
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Join Date: Jun 2015
Location: Racine, WI
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X5 E53 2005 Heater Control Valve

Coolant usually has some florescent dye in it. I think I will actually have to find my UV flashlight and try that with wife's. I have a feeling one of the reused o-ring seals from when I replaced the reservoir might be the culprit.

I need to add a pint every week or so with wife's car id like to get that resolved.

Where was the leak in your case?

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)

Last edited by andrewwynn; 03-12-2019 at 02:01 PM.
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