Coolant flow question.

[Kwattro]

There's a section of small diameter hose that runs from the rad to the de-gas bottle. Does liquid coolant actually flow through that hose steady or is it just vapor/gas? Thanks.

[Kwattro]

Anyone know?

[tnet69]

It is partly liquid, I only know because I left mine off when I changed my air filter and drove the truck to the store. It made quite a mess under the hood. Lots of coolant everwhere.

[nylyon]

I really have no clue, but I can speculate. I guess that that hose is there to protect the radiator in the event of high pressure. If there is high pressure in the radiator, the pressure is routed through that hose (could be vapor, could be liquid) to the degas bottle where the cap will vent with extreme pressures protecting the radiator. Under normal operation with the thermostat open, I would expect some liquid to flow from the radiator to the degas bottle. It will also serve to purge air from the radiator. That hose is also used as the coolant return hose with a coolant filter.

[smokersteve]

The hose coming from the radiator is a vent for the gas so it can go to the "de-gas" bottle. The other hose that is on the passengers side is connected to the EGR cooler.

[RescueF250]

Originally Posted by smokersteve

The hose coming from the radiator is a vent for the gas so it can go to the "de-gas" bottle. The other hose that is on the passengers side is connected to the EGR cooler.

What hose are you talking about Steve ? Are you referring to the small rubber hose thats coming off the degas bottle going to the passenger side ? If your talking about the one in the picture closes to the back of the motor that doesnt run into the EGR Cooler because I dont have it, it runs into the oil cooler itself. The rubber hose right behind the oil filter housing.

[smokersteve]

Yea I was talking about the small hose on the passengers side of the degas bottle. my mistake

[RescueF250]

Originally Posted by smokersteve

Yea I was talking about the small hose on the passengers side of the degas bottle. my mistake

Yea I was about to say opps am I missing something