05 rt 1000 over heating issue

[crm1000]

any one have any suggestions my buddy has a 05 rt1000 that is over heating had all the system cleaned out checked the water pump impeller says its good blead air from filled system seeams to be pumping while at idle but overheats when going across field under load any help would be appreciated

 

[canuck5]

This is weird the 05 RT's had a tendency to run cold and in limp mode. Do you know if the rear cooler has been deleted?

 

[woodies]

make sure you have the front end of the sled a lot higher(driveway bank or snow bank) and feel the coolers.bleed it off might be air locked

 

[crm1000]

ya i guess he has done all that with the front being higher and everything im still thinking its an air lock in the coolers what i think is maybe figure a way to try to pump the coolant in and hopefully push any trapped air out but thanx for the responses guys