Car temp goes cold 2 hot instantly

[Kingcater]

I have a 94 GT and when I start the car and after it runs for 5-10 mins the temp gauge from cold to red hot. I opened the hood and it doesn't seem to be over heating. I'm think just take the proper percausions and switch to a fluidyne radiator and a new thermostat.

Would you guys reccomend anything else. Also what degree thermostats come stock on these cars?

 

[94-302-vert]

Have you done any mods lately?

When this happens is the upper radiator hose hot?

Coolant level OK?

 

[The Green GT]

The FIRST thing I would do is get an after market water temp gauge.

 

[The Green GT]

And get this instead of the Fluidyne. I ordered one.

http://forums.stangnet.com/showthread.php?t=705826

 

[1TallMF]

That can happen if there is an air pocket in the upper intake near the sensor. Steam can make the reading go all funky. Have you had any part of the cooling system opened recently? If not, perhaps its just a bad temp sending unit, or gauge. A real temp gauge would be a wise investment, I know I need one.

 

[Kingcater]

That one is just as good as Fluidyne?

 

[The Green GT]

That one is just as good as Fluidyne?

Its pretty much the same dimensions, the welds are strong and thick from what Ive heard, and its alot cheaper.

Look in the thread I posted and someone should have posted a link to a thread with alot of info on them in it.

 

[HISSIN50]

You don't by chance have your gauge's sending unit in the t-stat housing do you?

Otherwise, the guys are right on. gauge movements faster than one would think possible are often due to air in the system.

Grab a Perf 180* t-stat. I like the Mr Gasket line personally.

Here are some cooling system generalities and diagnostic tips if you should need them (might be worth a quick read since you will be renewing some system components):

http://www.mustang-tech.org/wiki/94...cs#General_system_dynamics.3B_troubleshooting

Good luck.

 

[Kingcater]

Thanks you guys....