2007 Infiniti M35 Engine Overheating

What did you bring the car to the dealer for in the first place?

What did they say was the problem with the radiator?

I originally brought it in for heater issues. The heater will work momentarily then stop 15 minutes later. Only cold air will blow. I cannot remember what they said was the cause of the heater semi-working, but I believe they said it had to do with my thermostat being faulty. They also said my radiator had a rack. After I brought my car back home, I took a closer look. There was coolant residue all over that radiator. I could not pin point where the actual leak was.

OK, that makes complete sense. The reason you had no heat is because the coolant was so low there was nothing but air in the heater core and a leaking radiator would make sense as the cause.

Still...my question is still up in the air. If this radiator leakage has been there awhile...and I just filled it with new coolant. Why is it not taking? The upper hose is very hot and the lower hose is cool to the touch. The thermostat is brand new and just installed today. However coolant is not going through.

You could have messed up the thermostat but my guess is there is still air in the system. Either way yoy can't continue to drive it with a bad radiator. It has to be changed.

I surly doubt I messed up the thermostat. Three bolts and two hoses is the easiest set up. But you did strike up an interest with saying "air in the cooling system". Is there a way to bleed/prime the cooling system; as you would do for a hydraulic system?

We use vacuum to do that.
It's a tool called an "air lift"

Is there any visual instructions on how to use an air lift? Where does it hook up too? I would imagine it to be somewhere along the lower hose.

It hooks right up to the filler cap and puts the whole cooling system under vacuum and then draws coolant through that source. http://www.tooltopia.com/uview-550000.aspx?utm_source=google&utm_medium=cpc&utm_campaign=paid_search_google_pla&scid=scplp6842336&gclid=CMC4ws2z2cICFYtr7AodBBUAqw

There is a bleeder screw for the cooling system. it is near the firewall on the passenger side near the battery.