Is it possible to have a partially blocked heater core? Vehicle is 99 Taurus, currently at 83K miles. Last year (July) I had the cooling system flushed at a local shop. Coolant came out like mud. This was after a 30K mile interval since last flush. They flushed until they said it was clean.
One month later, the coolant was back to the nasty brown color. I flushed it myself and in the process, I found the heater return/bypass hose was "crunchy" (full of rust). That got replaced, and since the system was empty, the t-stat got replace as well.
Since then the coolant has remained clean and green (Prestone). Heat output is not great. It eventually gets very warm, but not hot as one would expect.
I suspect a partial heater core blockage. Would Clean and Cool eventially clean this out, or would it be inducing a core failure by removing the blockage?
Sorry for the windy message, and thanks for you input!
CC3
One month later, the coolant was back to the nasty brown color. I flushed it myself and in the process, I found the heater return/bypass hose was "crunchy" (full of rust). That got replaced, and since the system was empty, the t-stat got replace as well.
Since then the coolant has remained clean and green (Prestone). Heat output is not great. It eventually gets very warm, but not hot as one would expect.
I suspect a partial heater core blockage. Would Clean and Cool eventially clean this out, or would it be inducing a core failure by removing the blockage?
Sorry for the windy message, and thanks for you input!
CC3