Need help with cooling system

I need some help with my cooling system. I have a 71 CJ5 with V6 225. I have broken it down and am in the last stages of putting it back together. I have put on a new water pump and changed out the thermostat. problem now is that it is running hot and will over heat if don't shut it down. when I check it I see that coolant is not circulating. I have searched through prior posts and have pulled out thermostat and checked it in hot water on stove, works great. installed it the right way. I have flushed system as suggested to get any air out. I have pulled thermostat out and coolant still will not flow through top hose. bottom hose remains cold all other hoses heat up.

have I checked everything I need to before I replace the new pump I had put on?

 

I've got 2 v6 Jeeps. Both might run a bit warm in the summer. but I see no reason why yours would have an overheating issue now.
I'm wondering if there is a possiblity that there was a versioin of the 231 that ran a serpentine belt, IIRC the water pumps are the same between the 225's and the 231's.
The serpentine system runs the water pump in the opposite direction, so, it's possibly the problem that they sold you the wrong pump.
I'm sure some other members know more about this than me.
My neighbor strugled with his for years until he figured it out on his 83 CJ7.

 

Probably the wrong water pump. I had the same problem once, but was on a 258. Parts stores mess this up often. Look the same till you lay them next to each other.

 

I too have had problems in the past w/ my 225. If all else is ok, it is probably an air bubble. You will need to burp the system. Leave cap off of the radiator, cover the exterior of radiator w/ a peice of cardboard or newspaper, once the temp is up, the air blockage will keep the tstat open and allow air to escape. This may take a little time , but will work. Good luck.

 

Also a small hole in the thermostat plate will help bleed any air. Many thermostats used to have them, but not all.

 

I have no circulation even without the thermostat in. I have tried burping but nothing happens. I am starting to believe something is wrong at pump. either wrong one or its broken. anyone have the correct Napa part # for a 225?

 

New - TFW 43110. Rebuilt - WP 58110

 

Water flushes straight through radiator. it just seem as if there is no sucking going on at lower hose. as far as heads I have no idea. the only thing i changed was the thermostat housing. it looked like the original, the only difference was the neck that the upper hose connects to is longer but i do not see how this would change anything

 

In your first post you said you changed the water pump too. It would still be my first thing to check.
I'm thinking that your old one went in for a core so it is going to be hard to confirm that the impeller on the new one is correctly shaped.
My nieghbor fought with his for 2 years, recored radiator, another row of tubes, new hoses.
A friend stopped by to change the pump on his 4.0. In a fit or anger, Mike pulled the pump off of his 83 and we compared them, both had the same impeller.
Mike got the correct pump for his Jeep, now he has an issue getting it warmed up in the winter, been known to drive half of the summer with the grill cover zipped up all the way.
2 more thoughts, niether of them are too likely to be right.
Impeller is loose on the water pump shaft so it isn't really doing anything.
The other is a collapsed hose, I've never seen it at an idle on a motor but it was the only other thing I could come up with.

 

As i said, somebody smarter will comment, thanks warlock.

 

Could it be you have a radiator that is clogged internally and needs rodded?

 

Yah thanks to all. my next step will be to pull off pump, ill let you know what i find