Need help with this overheating problem. I pulled the thermostat and it was indeed broken. The copper shaft separated. No problem odered a replacement, installed and no workee. Car overheated again, seems like the new thermostat is not opening. Also, the heat did not work with the new thermostat in. I removed the thermostat and let the car run. No overheating and heat worked fine. Is my water pump bad? whats the possibility of another bad thermostat (highly unlikely) Im in Japan, so it takes about a week to get parts here from the states. Any help would be greatly appreciated!
Overheating
- Thread starter 04COBRAinJapan
- Start date
01cobravortech
Banned
Did you refill the system through the crossover tube? Did you burp the system? The cooling systems in these cars are very finicky. You can't have air in the system.
did you put the thermostat in upside down?
You can verify the thermostat is broken by putting it in a pot of boiling water and watch to see if it opens up.
Other possibilities are a bad water pump or a system with a lot of air in it. If you are confident that the system is burped properly and that your thermostat is opening, I'd replace the pump.
You can verify the thermostat is broken by putting it in a pot of boiling water and watch to see if it opens up.
Other possibilities are a bad water pump or a system with a lot of air in it. If you are confident that the system is burped properly and that your thermostat is opening, I'd replace the pump.
Last edited:
Im sure the stat is installed correctly. However, I did not service thru the crossover tube. where is it? Would air in the system cause this problem? It really seems like the stat is not opening because i can run the car with the cap off and it never burps.The water in the resevoir just sits there and begins to overflow once car gets warm. The fans are working fine.
01cobravortech
Banned
Its the black crossover tube with a square fitting. I believe its almost under the blower snout. It can take 2-3 days to purge the system of air based on how you do it. There are a few procedure write-ups that you can find with the search feature.
^^^Yup,you have air in the system.Plenty of info on here about burbing the system.
Burped the system as reccomended and it did not overheat. I will check the fluid levels again today and top off as neccessary.
Here are thr procedures, thanks to 01COBRAVORTECH!
Ok first and foremost you need to refill the cooling system through the black crossover tube. Its almost under the blower and you have to use a 1/4 drive to open it. Refill through there and make sure the cap on the radiator reservoir is off when you refill. Once the level rises on the radiator tank to the add line, then you consider the system full.
Put the cap back on the radiator reservoir and keep filling through the crossover tube until the tube is full. Put the crossover tube back on and make it finger tight. Turn the car on and put the heat vents on to full blast. Let the car run for like 20 minutes, wtahcing the temp gauge to insure you aren't overheating. Shut the car down and reopen the crossover tube the next morning. Add coolant. until the crossover tube is full. DO NOT REMOVE THE CAP OFF THE RADIATOR EXPANSION TANK. Do another heat cycle and allow her to cool down till night time. Follow the same procedure. Its a b*tch to get the air out but following this procedures will have the car burped in 2-3 days.
Here are thr procedures, thanks to 01COBRAVORTECH!
Ok first and foremost you need to refill the cooling system through the black crossover tube. Its almost under the blower and you have to use a 1/4 drive to open it. Refill through there and make sure the cap on the radiator reservoir is off when you refill. Once the level rises on the radiator tank to the add line, then you consider the system full.
Put the cap back on the radiator reservoir and keep filling through the crossover tube until the tube is full. Put the crossover tube back on and make it finger tight. Turn the car on and put the heat vents on to full blast. Let the car run for like 20 minutes, wtahcing the temp gauge to insure you aren't overheating. Shut the car down and reopen the crossover tube the next morning. Add coolant. until the crossover tube is full. DO NOT REMOVE THE CAP OFF THE RADIATOR EXPANSION TANK. Do another heat cycle and allow her to cool down till night time. Follow the same procedure. Its a b*tch to get the air out but following this procedures will have the car burped in 2-3 days.
Make sure you get a FORD THERMOSTAT. The part store ones don't work, I had a bad one right out of the box, had 240* temps, put my stock OEM one back in, didn't get above 204 all day long..
170° PERFORMANCE THERMOSTAT (96-06 Mustang, Cobra and 4.6L DOHC-4V, SOHC-3V) by Reische Performance Products would be even better than OEM
If I didn't live in a cold climate I agree..
True... most part stores won't even give you the right thermostat, they'll usually give you an SOHC t-stat. However if you ask for a t-stat for an 05-06 GT you'll probably get the right one.
Users who are viewing this thread
