1998 Mercury Sable Overheating

1998 MERCURY SABLE
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NETTIE71111
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Engine Cooling problem
1998 Mercury Sable 120000 miles

My car overheats when its in traffic but it fine when I am steadily driving I have replaced the thermastat and when it overheats i open the overflow and clay colored water colems out of it and I put new water and coolant on it and it usally works but it hasnt latly ...... What could be wrong????
Aug 8, 2009 at 11:52 PM
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