Hi there,
You may well have an air lock in the heater core, I would replace the thermostat and flush the cooling system, when bleeding the air out of the cooling system try taking off a heater hose and filling the core with water first re fit one hose and loosely fit the other, as the system is warning up try and allow any trapped air out of the loose hose and re tighten.
Mark (mhpautos)
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Saturday, July 19th, 2008 AT 1:24 AM