[BarryGMC]

Hi. I have found 2 reasons for rebuilt engines to overheat. Air in the cooling system. This is rare in a jimmy v 6. And tight clearances in the engine. Piston and rings in particular. I always spend time on the set up and fit each hole to each piston. How hot is it running? Most piston have a one thousands variance and new bored holes can be 1.5 between bores. It all depends on the machining. Lots of old boring bars ang crank grinders can't hold 1.5. Between . So sorry lots of q's to why it's hot. Barry