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Car overheating

Tiny
RALLIW51
  • MEMBER
  • 1993 BMW 525
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 235,000 MILES
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.
Tuesday, June 10th, 2008 AT 8:58 AM

2 Replies

Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
The over heating issue can be caused by the fan clutch not engaging. The heater issue can be caused by the heater valve.
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Tuesday, June 10th, 2008 AT 9:13 AM
Tiny
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.
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Sunday, June 22nd, 2008 AT 11:36 AM

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