Originally Posted by bigdog7373
210 isnt overheating. You didnt say whether there is a shroud on it or not.
What do the pullies look like on the water pump/ crank. Sounds like he might have those "underdrive" pullies and its getting just enough flow at idle to keep it cool but as soon as the a/c is on there's too much heat for it to keep up.
I have those pulleys and what I did is I installed a high flow water pump and it does just fine even in this stop and go Texas heat im telling you the pump does really put out more water I seen the flow before and after.