I have had the same problem for years. After alot of troubleshooting and a heater core change with the same problem reoccuring, I have determined the cooling system produces rust and accumulates at the lowest point in the system "The Heater Core". About every 2-3 months I have to flush the heater core (not the cooling system) with compressed air and clean water. The coolant that comes out is rusty and nasty. Heater is hotter than heck for a few months then just goes cold. Repeat flush and works great again.
Does anyone have a solution for the rust?
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Tuesday, January 26th, 2010 AT 12:28 PM