after replacing water pump, thermostat, flushed radiator it overheats at idle

2002 PONTIAC MONTANA
170,000 MILES • 3.4L • 6 CYL • FWD • AUTOMATIC
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REDBONE
  • MEMBER
  • 105 POSTS
Van has new water pump, thermostat, flushed radiator and it overheats at a idle. could the heater core be bad?
Jan 27, 2017 at 8:29 AM
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CARADIODOC
  • ✓Experienced Mechanic
  • 34,400 POSTS
If the overheating does not occur at highway speed when natural air flow through the radiator is sufficient, the best suspect is an inoperative radiator fan.
Jan 27, 2017 at 8:40 AM
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