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Slight coolant leak at Thermostat Housing 200 1990

Flushed the coolant today and installed new thermostat and seal - the old one was stuck open. Everything works great now (T gauge at 9 o'clock instead of 7), just drove 100+ miles across PA at 70+ MPH. Coolant level is at the Max in reservoir - no appreciable drop in level. However, there is super small amount of coolant seaping around the bottom of the thermostat housing. I know it's fresh since I looked before and wiped the area clean of coolant. I tightened the housing down real tight before I drove her. Whattya think? Should I put on a new seal? I don't think I can tighten the housing anymore for fear of seizing and breaking the bolts. Any help would be much appreciated.

Thanks,

Charlie






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