Question??

[Reek09]

Why does my car overheat with the thermostat in but without the thermostat in it doesn't?? I can add coolant to the reservoir and everything and it won't overheat.

[SpartaPerformance]

What? It over heats when in but doesn't when in? I think you asked question wrong. LOL

[Spectragod]

When the thermostat is in, you need to burp the air out of the system for it to function properly.

[Reek09]

What? It over heats when in but doesn't when in? I think you asked question wrong. LOL

Umm no..I think you read it wrong. Read it again slowwly you will understand what I said ...lol

[Reek09]

When the thermostat is in, you need to burp the air out of the system for it to function properly.
I did burp it but maybe ill try again in the morning. Maybe I didn't get all the air out. When I do it again before I start it should I top it off from the crossover tube then let it run to operating temperature then shut the engine off and top off more then let it cool down and do it again??

[Blackened300a]

With the nose of the car on a incline, fill the engine through the crossover tube then fill the tank. Start the car with the crossover plug loose and let it warm up to operating temp. Let the car cool and refill through the crossover tube if it needs it.

[Reek09]

With the nose of the car on a incline, fill the engine through the crossover tube then fill the tank. Start the car with the crossover plug loose and let it warm up to operating temp. Let the car cool and refill through the crossover tube if it needs it.

I already filled it up with coolant do I need to drain it and start over? Or can I just top off the tank and crossover then start it and let it warm up? How many jugs of coolant does the engine take anyway?

[Blackened300a]

I already filled it up with coolant do I need to drain it and start over? Or can I just top off the tank and crossover then start it and let it warm up? How many jugs of coolant does the engine take anyway?

Not sure on the amount. I have heard cases of the thermostat installed backwards. Let the car cool and remove the coolant crossover tube plug. See what you have in there. It should be full, if not fill it up with the engine off and reburp it.

[MyBlackBeasts]

Why does my car overheat with the thermostat in but without the thermostat in it doesn't?? I can add coolant to the reservoir and everything and it won't overheat.

Does the fan kick in? If fan inop, the coolant in unobstructed flow with out the tstat would take signicantly longer to reach an overheat.

[1stMerc]

From ModularFord web site

Ford's way to burp your cooling system!!

I've been going over thread after thread trying to get air out of my cooling system with no luck. I have access to Ford's tech service so I finally found their reccommended way to burp the system without having their special tool, and here it is word for word. This worked perfectly and now all the air is out, plus it's much easier!!!


Check all hose clamps for correct tightness. Make sure the radiator (http://www.ebay.com/sch/i.html?_nkw=radiator) draincock is closed.

Remove the coolant bottle cap (http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_x_15480044-P_x_x) and fill the degas bottle to the add coolant line.

Install the cap.

3. CAUTION: Do not fill the cooling system through the reservoir only (coolant will not enter the engine), only the reservoir and the radiator (http://www.ebay.com/sch/i.html?_nkw=radiator) will be filled and engine overheating will occur.

Remove the fill plug in the crossover tube on top of the engine.
Using a funnel, add coolant to the crossover port, keeping the level of coolant in the funnel at 1/4 full.

Squeeze the 2 large upper cooling system hoses 5 times. Bubbles may appear in the funnel as air exits the system.

Start the engine and run for 5 minutes while monitoring the coolant in the funnel.

A sudden drop in the funnel level indicates the elimination of air in the system.


Shut off the engine and let it cool for 10 minutes.

Crack open the degas bottle cap enough to allow the coolant level in the funnel to drop to within 1 inch of the bottom of the funnel.

Tighten the cap.


Remove the funnel and install the fill plug in the crossover tube.

Add coolant in the degas bottle to the full coolant line.

Repeat the fill procedure if necessary.



Last edited by MystiChrome04; 08-04-2008 at 12:50 AM.

This is the way i do it, but i also squeeze the lower hose as well. Watching over bottle and crossover tube for bubbles.

[Reek09]

Not sure on the amount. I have heard cases of the thermostat installed backwards. Let the car cool and remove the coolant crossover tube plug. See what you have in there. It should be full, if not fill it up with the engine off and reburp it.
I put the tstat in the housing with the spring facing up(bottom up) I made sure I put it back in the right way. I most likely didnt get all the air out and prob didn't let it run long enough either to get warm enough.

[Marauder Rick]

Are you SURE that the Tstat is working properly? It may not be opening causing the coolant in the engine to continue heating up without cycling out.

[Reek09]

All that burping I did for nothing..I have a hole in my radiator. I saw it when it heated up the coolant was coming out in a little stream on the side near the top. So does anyone have any suggestions on where I should get a new radiator? I'm due for one anyway it hasn't been replaced since I got the car in 07.