My wife's Expedition obviously has some built up deposits in the heater core. Since the heater wasn't getting hot, I backflushed the heater core recently (with the garden hose). The heater blew HOT for about a week after that. It gradually started getting cooler & cooler (again). Now it's back to just blowing lukewarm.
If I use Prestone Super Radiator Cleaner to get the deposits out of the system, how much of a risk is there that this will cause a leak in the system? Having to take the entire dash out to fix a leaking heater core would really stink.
If I use Prestone Super Radiator Cleaner to get the deposits out of the system, how much of a risk is there that this will cause a leak in the system? Having to take the entire dash out to fix a leaking heater core would really stink.