I was noticing my coolant looking a little rusty the other day, got to thinking about a flush, and realized that I know absolutely NOTHING about my heater. Shop manual doesn’t mention it from what I can tell. It’s the same type as Kevinski.
Am I correct in assuming that coolant is always circulating in the heater core and there’s no valve that controls it? My heater hoses need replacing anyway, and I was thinking a very low pressure backflush of the core might be good while I’m making a mess.
