search is unavailable so i need some answers now.

just got my motor back from the machine shop n installed it. it was built for turbo with pistons n ect. i have a cometic headgasket also.

now i start the car n it overheats when i drive. i blead the bleeder by the upper rad. hose and at first alot of air came out n then wen coolant finaly came out i closed it n topped off the radiator. then i drove it n it overheated again. wat is going on? im pretty sure the thermostat is opening but wat else could b going on?

 

Are you losing coolant?

Perhaps when you/they put the coolant in, they didn't bleed it properly. When you do an engine overhaul, you gotta bleed it for a while since the block is basically empty.

 

Fan not turning on?

Trying turning on the HEATER on FULL FAN SPEED! while you leave the cap open. It may help get coolant circulate in there also. And just wait till all air bubbles come out.

Check for head gasket leaks.