I am new to the forum and want to say thank you in advance to any help I may get. 03 Prairie 650 overheats and sends half the coolant out the reservoir overflow. I had the heads rebuilt and installed new head gaskets as well as a dyna cdi. I removed all coolant lines and blew air through them to make sure there was no blockage in any line, flushed the system, cleaned radiator, tested the thermostat, and installed a fan switch. I went out last night in 30 degree weather to plow my driveway with fan on and within 20 minutes I had coolant pouring out the overflow and the light flashing hot. I am clueless at this point as to what this could be, any help would be greatly appreciated.
Thanks
John

 

Can you tell if water is circlating? water pump working? radiator cap good? Just afew questions thanks for understanding in advance

 

Waterpumpis good, I didnt even think to check the cap though. I will be doing that after work today.
Thanks for the help

 

Thanks papa hogg scoot, I flushed it again filled and burped while standing the front up, and put on a new cap. 2hrs continious running on Sat. never went over 180 degrees, thanks again