changed radiator still overheating

[mercmt]

I just put a rebuilt radiator on my 2000 mountaineer (v8) Long story short. It's still put. I have let it heat up and down twice so far. Both times topping off the radiator. I was hearing thumping sounds after I turned off the engine (and before) the first time. a friend suggested that was air. The 2nd time I walked away for 5 minutes and the temp gage was all the way to hot. I also noticed anitfreeze leaking and discovered that the overflow canister was overfull.
So do I need to bleed or do I have other problems. If bleeding is required how do I go about it? Thanks

 

[SoHK_alumni]

Two common possiblies and one less do.

Bad thetmostat or bad fan clutch are both likely.

A bad water pump impeller is also on the list, particularly since the overheat occurs very quickly.

 

[mercmt]

Thanks. I am going to try and get the air out. hoping someone has done that.

 

[DJC333]

Replace the t-stat. If it's still blowing coolant in to the overflow bottle, it's probably a blown head gasket. I'm assuming it was overheating before you put the remanufactured radiator in?

 

[mercmt]

Yes It was overheating before the radiator replacement. I don't think it is the thermostat because the upper hose gets warm. that means the thermostat is opening.

 

[BustedKnuckles24]

Did you replace the radiator cap? This is responsible for regulating the pressure inbthe cooling system. A bad cap allows too much coolant to flow into the overflow reservior. The engine overhests due to lacknof coolant in the engine when this happens.

 

[mercmt]

Did you replace the radiator cap? This is responsible for regulating the pressure inbthe cooling system. A bad cap allows too much coolant to flow into the overflow reservior. The engine overhests due to lacknof coolant in the engine when this happens.

I have not but I think I am going to try that as well. I am going to try this procedure
https://answers.yahoo.com/question/index?qid=20060826142310AAOCfGZ

 

[mercmt]

Ok I followed that procedure(the link in my last post) for getting air out. While I was at it I did change the thermostat as well. However I am certain the old one was functioning because the upper radiator hose got hot and it emitted heat out of the heater.
Anyway. I ran it 20 minutes and then took it for a 15 minute ride. the temperature gauge remained dead center though the whole time. so I am going to call that a success!! thanks for all your input.
I highly recommend the procedure shown on the aforementioned link