Coolant leak only when AC is running ?

sint3k · #1 (**permalink**) 07-02-08, 05:28 PM

I have a coolant leak on the right side of the vehicle only when the AC is running engine never overheats never gets hotter then 210 "straight up".

Can't find any leaking hoses ? BTW its a 97 cadillac eldorado ETC

Mark C · #2 (**permalink**) 07-02-08, 05:39 PM

Sure its not condensate dripping out of the A/C evaporator, which is a perfectly normal occurance?

sint3k · #3 (**permalink**) 07-02-08, 06:03 PM

Its orange i was wondering if theres any kind of valve for the heater core on the eldorado ETC that may turn on while the ac is running ? I know it sounds odd but something is causing it to leak only when ac is running and can't find where yet. Maybe heat from the evaporator causing something to expand more then when its not running or something

misfit6794 · #4 (**permalink**) 07-02-08, 07:34 PM

The easiest and fastest way to find a coolant leak is to pressure test it.

**Ranger** · #5 (**permalink**) 07-02-08, 08:28 PM

A/C has nothing to do with it. Why you only see it when the A/C is on, I can't say. Follow mistfits advice and it will show itself. Might be a cracked surge tank.