1997 Buick Park Avenue engine runs hot without heater on

1997 BUICK PARK AVENUE
150,000 MILES • 6 CYL • FWD • AUTOMATIC
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JDJ2009
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My park ave ultra runs hot (over 200 up to 216) when I am doing stop and go driving unless I turn on the heat/defrost.It runs normal on the highway.I have replaced the thermostat,the upper and lower hoses,had the system flushed out at the buick dealership,checked for holes or leaks,and had it looked at by a mechanic.What I want to know is if anybody knows why this is happening and what can be done?
May 17, 2009 at 2:05 PM
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DOCFIXIT
  • ✓ASE Certified Mechanic
  • 18,828 POSTS
  • ASE Certified Mechanic
Have cooling fans been verefied to operate properly? Also radiator maybe partically blocked feel bottm when car hot same temp as top or middle?
May 18, 2009 at 3:13 PM
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JDJ2009
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[quote:d3fc44dc0e="Docfixit"]Have cooling fans been verefied to operate properly? Also radiator maybe partically blocked feel bottm when car hot same temp as top or middle?[/quote:d3fc44dc0e]
The mechanic said that both fans are working good.I just had the cooling system flushed,so if there were any blockage wouldn't it show up then?
May 20, 2009 at 7:10 PM
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