I'm kind of with foxfire and kind of not. I agree the first place to look is at the water mix - but I'd just make sure you're not just running really hard water (like, you can't see through your clear shower curtain but you still filled your block with your garden hose) especially w/o enough antifreeze. But then, and pretty much at the same time really, I'd eliminate basic physics (THE CAP, gaskets, and even a faulty gauge or bad sending unit (ie, you're running hot but your gauge isn't telling you so). Then I'd try water wetter - but, if you're running at 180* I don't really think your problem is with conduction - just boiling points.
<font size=-1>[ This Message was edited by: 69convert on 8/21/03 10:22am ]</font>