I Have A 93 Honda Civic That Over Heats.when I Start The Car And Rev It Up It Pushes The Coolent Out The Rad[with The Cap Off].when It Over Heats It Pushes The Coolent Back Through The Rad And In To The Over Flow Bottle And Out It Does Not Suck The Coolent Back In To The Rad.what Might Cause That.it Has A New Rad,tstat,rad Cap,upper And Lower Hoses.

I Have A 93 Honda Civic That Over Heats.when I Start The Car And Rev It Up It Pushes The Coolent Out The Rad[with The Cap Off].when It Over Heats It Pushes The Coolent Back Through The Rad And In To The Over Flow Bottle And Out It Does Not Suck The Coolent Back In To The Rad.what Might Cause That.it Has A New Rad,tstat,rad Cap,upper And Lower Hoses.
Have u bled the air out of the system? That will do it evertime its not hard but takes a lot of time

If there is no air you might have a bad head gasket, the compression from the cyl can push air in the coolant and force it out