i got a 95 civic ex that slowly overfills the resorvoir until it leaks down but i notice that when the car is hot, the level is hight but when its getting cold the level goes down but one it gets cold and get the car back running its when it overfills it

 

A filling resovoir is a symptom of a blown headgasket. Have a mechanic do a carbon test, its a paste they add to your coolant that changes color to indicate the presence of carbon. That will tell you if you have a blown headgasket.

 

it could just be a bad radiator cap, i.e: the spring is just getting old and weak so it lets the coolant leak into the resovoir when it's not suppose to or the gasket is just bad. try changing out the radiator cap and see how that works if it still leaks then do a carbon test...hope it helps...GL

 

changed radiator and cap because car was over heating when you got to a stop but would cool down when running

 

yea I'm really no expert about these stuff yet since I'm kinda new to it. But I did try something like that with my car. Mine would over-fill at times, and sometimes the water would just run out in a day. Turns out I had to change my radiator and everything worked fine after. I think one of the causes of those problems are that your driving your car at a high RPM with you compressor turned on. I heard that's not good. Correct me if I'm wrong though.

 

If you're overheating when you're stopped, then it sounds like your fans arent coming on. Check your fan/fan relay.

And what are you talking about the compressor? The AC compressor? That has nothing to do with overheating. The AC compressor is on a load switch, so if you slam through the gears at high RPM it shuts itself off anyway.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by raf_vtec &raquo;</TD></TR><TR><TD CLASS="quote">yea I'm really no expert about these stuff yet since I'm kinda new to it. But I did try something like that with my car. Mine would over-fill at times, and sometimes the water would just run out in a day. Turns out I had to change my radiator and everything worked fine after. I think one of the causes of those problems are that your driving your car at a high RPM with you compressor turned on. I heard that's not good. Correct me if I'm wrong though. </TD></TR></TABLE>

If you're talking about the AC compressor it doesn't have anything to do with it.

@ OP:
As others have said - try the rad cap, if the spring's weak it'll dump prematurely causing it to fill up faster and eventually overflow

 

oh really? ok.. Yea others have told me that if your really go high reving with your car while your AC compressor is on, it'l cause problems after a while.