Car overheating

1993 BMW 525
235,000 MILES • 6 CYL • 2WD • AUTOMATIC
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RALLIW51
  • MEMBER
  • 1 POST
My car overheats while standing. when I am driving at full speed, everything is ok but when i stop at the light or when I am in stop and go traffic it overheats.

I have also noticed that my heater is not working.
Jun 10, 2008 at 8:58 AM
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DOCHAGERTY
  • ✓ASE Certified Mechanic
  • 9,606 POSTS
  • ASE Certified Mechanic
The over heating issue can be caused by the fan clutch not engaging. The heater issue can be caused by the heater valve.
Jun 10, 2008 at 9:13 AM
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FORTUNATO747
  • MEMBER
  • 5 POSTS
These problems could be related. Possibly check for clogged passageways in radiator & heater core. Other possibilities include clogged/or broken shut thermostat. First check for circulation of coolant in warmed engine,this determines the status of open/closed thermostat.Second check for sediment in bottom of radiator.This would be most prevalent in clogged radiator/heater core.If someone ever used a stop leak in the radiator, it can clog passageways.
Good Luck.
Jun 22, 2008 at 11:36 AM
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