overheating, ? Options

[jayi12-15psi]

Lately my engine has been running warm, it's not getting too hot, just almost to the top of the little temp. emblem(as opposed to being on the little wavy line). I replaced the radiator in august, and it started doing this a few months later, so I took it to a mechanic. The mechanic found a small leak when he pressure tested the system(it was a hose he tightened it, and filled the radiator back up with coolent). Then about a weak later it started doing it again. I seem to be losing a small amount of coolent, is it possible for coolent to somehow disapeer in a pressure tight system? Because I can't seem to find a leak.

Thanks for listening.

[jayi12-15psi]

well, how much loss in coolent would make a difference? For instance I add coolent everytime it starts heating up, which is about once a week of daily driving. Maybe every couple hundred miles. Each time I only add a little coolent, as in maybe a couple cups worth. So if the coolent is just a little low, will the temp register low? I've never replaced my thermostat, and my car has about 187k miles, I'm just trying to avoid a costly diagnostic.

thanks again guys.

[jgreening]

So if the coolent is just a little low, will the temp register low?

If its a "little low", there should be no effect on temperatures. If its really low, your temps will skyrocket and you could damage your engine.

I hate to say it but Coomer may be right with the head gasket. Its not a cheap fix. Typically, it requires removing the head and refinishing the block and head surfaces (I think both) and installing a new headgasket. Its actually my fear right now about my car but I guess I might be able to upgrade to a MLS headgasket and ARP studs and bolts. Then I could try some race gas and 25psi!

Actually, I really hope thats not it for both of us.