My H23 blew its headgasket, so I am in the process of swapping in a JDM H22. I will be replacing the radiator (my old one is shot) and the upper and lower radiator hoses. When I drained my old radiator, about 2 quarts of oil came out. The only part of the cooling system thats not getting replaced is the heater core and the stuff in the firewall. While the engine is out I am going to flush out the heater core with a garden hose. My question is if there is anything special I should use to get the oil out? Maybe some kind of detergent or something specially made to take oil out of a cooling system. Or is it good enough to just run an *** load of water through it? Thanks for the help.

 

maybe some radiator flush....but that stuff usually isnt good for it...

safer to just get a new one...

 

Since I have a JDM clip, maybe Ill just take the whole cooling system out of it. How hard is it to change the heating core?