Engine cooling Question

JCat wrote:
I have a Freightliner chassis, and a CAT C7 engine.
I am going on a tip next week and and was checking all my fluids.
The overflow coolant tank was low, had a little fluid on the bottom.
So I added a gallon to get it up to the full line.

I ran the engine for about 30 min and none of the fluid was pulled out of the overflow tank.

My question, if the cooling system is also low in the radiator, will it draw from the overflow tank ?

If no than I need to check the radiator once it has cooled.

Thanks

JCat,
First off, let's get some basics here. How long have you owned the coach? If you've had this coach for a while, was the coolant reservoir tank full when you got it? If so, how long ago did it loose the fluid? Have you done any inspection of the bottom of the radiator, hoses, heater hoses, motor aid connections, heat exchanger/trans cooler connections and more, to see if there's any evidence of leaks?

Second, that tank is the ONLY place you can check the radiator coolant. There is no other place to check it. There is a level line embedded in the tank for the coolant level. Do not fill it above that line.

If you have experienced a leak, a good inspection is in order to determine where it was/is or, all the new coolant you just put in, will exit the same leak. These coolant systems are bullet proof. About 99.9999999999% of us never touch them. Let us know what you find out.
Scott