I have come across a problem the dealer cant figgure out (big surprise there). Sometimes when driving my heater stops working and the trucks engine temperature steadily rises to about 245 and then drops back to normal... I looked under the hood and coolant was coming out of the resivour. They replaced my EGR cooler, which proved nothing as it still has the problem. Anyone have any ideas?

 

thermostat

 

Thats what atleast 30 people have said, but the dealership says; "It would be throwing codes then"... Hell with it, Im going to install a thermostat myself now.

 

i bet whit is right. if pump is cir. right thats the only thing it can be im thinking.

 

nuttin can hurt man do it.........jus pay attention to direction, some peeps put them in upside down

 

just wanted to though in that an air pocket in the coolent system can also be the problem but i would check the thermostat also

 

you might have blown a head gasket. people have had problems when running a programer on high setting and towing.

 

About the only options it could be would be the thermostat or the radiator cap itself.

 

Its coming out of the resivour, arent those caps not even supposed to have a positive seal?

 

The caps are supposed to be set to a pre-set pressure but I don't know what it is in your truck. If they open to early then the thermostat may or may not have enough back pressure to open and if they stick closed it could cause to much pressure in the system and over heat it. The thermostat and the cap have to work together to make the system flow right and maintain the temps. It takes a combination of the right pressure in the system and the right water flow to maintain the right operating temps.

Sorry, I just don't know any easy way to describe it. But even replacing both items would cost you under $20. Or if you know somebody that has a pressure tester you can check the whole system out.