to make a short story long, i got an itr shell that was previously turbo'd. previous owner had the engine overheat and blew the head gasket. while i was cleaning out the engine bay i noticed the coolant overflow was half full of oily sludge, the radiator had oil in it, and the heater core also had oil in it. i managed to flush out the heater core with a hose to where the water coming out of the outlet had an oily film, but specs of oil no longer came out. i tried the same w/ the radiator but it's still a little sludgy. what do i do to clean the radiator, heater core, and overflow bottle so they can be reused?

 

someone suggest using radiator flush, but how do you do a flush w/ no motor?

 

I would use radiator flush, but keep it concentrated. As far as circulating it through the system, you really cannot do that. The hoses can go in the trash for new ones, you can get a new overflow from any Integra at the junk yard for pennies on the dollar and if it's a real pain in the ***, simply order a new and better radiator (Koyo, Fluidyne, etc.)

If you want to keep the old one, cap the lower radiator hose port, fill the radiator and let it sit over night or something like that. I would mix the flush with boiling hot water to help break down the oil residue.