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M | I don't think it matters so much what kind of driving . But from what I heard by the design coolant sludge settles out in the heater core . To get at the heater core you have to pull the air first to get at the heater core first that can be costly.i tried flushing the heater and that didn't work. I ended up tradeing and changed coolant at 100,000 miles on this one and have 250,000 on this one and still cooks you out. | |
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