search is bringing up heater core stuff but nothing on a bypass. so ? is; can i temporarily bypass the heater core by just connecting a hose in place of the core? or something to that extent? reason being is i have rusty water in my system and everything on the coolant side needs a replace but figure it would be best to do everything at once. and my wallet isn't in the right condition to replace everything right now. so, can this be done?