Question about 2002 Ford Taurus

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Periodic Anti-freeze leak.

This is kind of curious so bare with me. Two days ago I realized that the AC was not as cool as usual. I figured it needed a recharge. The next day I take a trip to my sisters, which is about an hour away, with my AC on and my temp gauge goes up. I stop to check it and end up putting two and a half gallons of water in it. I figure, GREAT, I've got a leak in my radiator system somewhere. So I stock up on water and start the trek back home. I left the AC off so my motor didn't work any harder than it had to. Strangely enough, it never over heated. I checked it half way home and when I arrived home and it didn't lose a drop of water. Now, today I turn the AC on when I drove into town, a trip of about ten miles, and checked it when I got there. I put one half gallon of water in it. Apparently, I'm only losing anti-freeze while I'm running the AC. I've been looking for any leaks and/or suspicious pools of water but have revealed nothing so far. My mechanic says he can't look at it until next week and that sucks. So, any info available will be helpful, even better would be a site or some schematic of the AC/radiator system.

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  • T-RAV0806 Jun 16, 2008

    Fan was operational while I was under the hood and upon refilling reservoir I always start the car and let it cycle the fluid through to eliminate air in the system and fill to the proper level. It's possible that the fan quit for some reason those two particular days, but not plausible as the car has been running fine without the A/C on. I know that anti-freeze doesn't run through the A/C compressor, it uses freon or some other type of fluid coolant. I guess I should have made myself more clear. I'll rephrase. I believe that there would have to be a pinhole somewhere in the line in order to be losing anti-freeze. If I remember correctly radiator systems run somewhere around 16psi, it's been a while since I've worked on them. Would running my A/C cause there to be more heat or steam, which would cause more pressure, that could be opening the pinhole that, under less stressful conditions, would normally remain sealed. I say this because I didn't see a conventional pressure release cap on the radiator that leads to a hose that runs into the reservoir. In fact, the only place I saw a cap was on the reservoir and the hoses that connect it to the radiator are feed lines not overflow. Again, any thoughts will be appreciated. By the way, it's not leaking into the block or anywhere else.

  • degunz Jul 11, 2008

    I also have a 2002 Ford Taurus Wagon SE. Yesterday I noticed it was overheating and I had the AC on. I turned off the AC and pulled over to a shaded area. It took about 15 minutes to find, but I found a "pin-hole" near my reservoir cap. I now need to replace the reservoir.

    Perhaps you have something similar.


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The ac and radiator are two seperate systems ,the electric fan is common to both of them ,be sure your fan is working and are you filling the over flow to the correct hot and cold level?

Posted on Jun 15, 2008

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