What causes my cooling system to run warm?

1996 BUICK ROADMASTER
85,000 MILES
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MR. NOBODY
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  • 1 POST
coolant check=ok
rad. check cold ==ok
idler for water pump=ok
right fan works. Lowers temp. some
left fan never starts.
heater core changed
thermostat changed
hoses ok
Nov 30, 2011 at 4:19 PM
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JDL
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Are you saying the engine overheats? How hot does it get in degrees F? Do you have coolant flow through the system?
Nov 30, 2011 at 5:09 PM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
The primary fan should come on at 225 degrees F. The secondary fan should come on at 232 degrees F. The fans can also come on with the ac.
Nov 30, 2011 at 5:13 PM
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