When should I flush my radiator/heater core?
This will be the 3rd winter that I've had my Ranger and I remember from my 97 Taurus that the Vulcan's, being all-iron, had issues with the heaters cores becoming clogged with rust if the cooling system has been neglected. My question is, how often should I have them flushed out?
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1987 2.3/TK5, 125K.
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