When changing coolant on a 2003 Protege 1.6L, how do you drain the radiator and engine block and after doing this how would you get the proper 50/50 mix added back in? Wouldn't residual coolant in the radiator system overdilute the 50/50 mix? Thanks.
On the bottom of the radiator there is a valve that will drain the radiator. After that you should disconnect the coolant bottle and dump that. Now if you already had 50/50 in the vehicle and add 50/50 you still have 50/50.
