OK-I think I blew something up. Yesterday I got in my car to go to work.I drove about 2 miles to the freeway on ramp and as I was pulling on the highway I started hearing a ratteling noise.I went back to my house and started checking stuff.Oil level was perfect,coolant was good.At idle it is barely noticeable but when you throttle it under load it sounds like a diesel(real bad).So then I noticed my temp guage not working.Diagnosed a bad sender and replaced it.My fan was also not kicking on and I thougt the sendor may have been the problem,but no.Fan still not working-think its dead.So getting frustrated, I left it alone for a couple of hours and went back at it.I idled the car in my driveway to see if the problem would reoccur and after like 15 minutes I took it for a drive again. Noise still there and no fan but guage working-running warm but not overheating.At first I thought it could be a catalitic convertor rattling but then I saw a ton of steam out my exhaust and trails of water behind my car where I pulled it into the driveway--headgaskets????The wierd thing is that it idles fine,I never had headgaskets go so I dont know if it would idle normal-but the steam and water trails makes me think its a gasket-or is it something worse like a spun bearing.I need help-anyone ever have these sypmtoms?????