So, I let the woman drive the mustang yesturday just because, she calls me up while I am at work and says "I dont think the temp. gauge isnt working because it is way past the red and the car is running fine, I am almost to the house", I ask her how long its been like that and she has no idea.... Heres another thing though. I have put 300 miles on the car since I put a NEW water pump, head gaskets, 180d thermostate, and Evans coolant. It has a heavy duty 3 row alluminum radiator and the stock fan. I have been driving this thing all week and I was lucky to get it to 180d. WHAT THE F$#@.... So, I get home from work an hour later HOPEING that the gauge is broke and I start the car up and the car is running just above 180d. I am pissed so I dont do anything with it last night. I decide I am going to drive it to work this morning and check it out. hopeing its a fluke. I get about 2 miles from the house and the needle goes constantly to 200+, I pull over and shut the car off swearing ALOT. I give it a minute, start it up and its at about 180d. Starts to climb but I say WHATEVER and keep driving and then the temp jumps down to about 160 like it has been for the last 300 miles I have driven it and stays that way the whole way home.?? :headscratch: I let her drive it because she recently totalled her 81 jag (it was prestine) I am ready to get rid of this mustang now. I have had it for 3 months overheating and after all I have done its overheating again. I am thinking thermostate but since she barried the needle I am thinking I am ready to get rid of the car. Any suggestions ??? If it aint the thermostate bring $3000 bucks and its yours.....