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Vehicle engine overheating can be caused by several factors:

  • Loss of coolant
  • stuck or damaged thermostat
  • plugged radiator
  • insufficient air across the fan (failed radiator fan or radiator plugged by debris)
  • failed water pump
  • failed head gasket
  • cracked head
  • improper ignition timing (although rare and seldom causes severe overheating)

Unfortunately, an overheating engine isn't always caused by the same thing.

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14y ago

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Put AC ON car over heats?

Running the AC adds extra load to the engine and radiator. If the cooling fan, radiator, thermostat, or coolant level isn’t doing its job, that added heat can push the engine temperature too high. This often shows up in slow traffic or when idling. I saw a case like this at Stewart’s Automotive of Sacramento where a driver said the car overheated only with the AC on. After checking it out, the issue turned out to be a weak radiator fan that wasn’t moving enough air at low speeds. Once the fan was replaced, the car stayed at normal temperature—even with the AC blasting.


What happens when your car over heats?

Either 2 things...it breaks down...or it explodes


Can the check engine light come on if the car over heats?

Yes, on most cars it will.


Why does your car overheat while driving?

Need to change your thermastat i have done that but still over heats when driving


What happens to a car engine when it over heats?

crack the engine block and oil mixes with water or antifreeze.


Why does car overheat while driving?

Need to change your thermastat i have done that but still over heats when driving


What could cause the car to over heat you put in a new water pump and thermostat and hose the fans are working but the car heat to 253 dgrees and over heats?

clogged radiator


How do you test water pump on a 1997 Ford Taurus?

Take the thermostat out, start the car and let it idle, see if it over heats. With the thermostat out of your car, it should just constantly circulate water, making it take longer to heat up. If it heats up fast then chances are that your pump is out. DO NOT LET THE CAR REDLINE.


Your car over heats quickly when you give it gas?

Check coolant level Perhaps thermostat is not opening to allow coolant flow


Car over heats when in idle?

Sounds like you need a radiator coolant flush or you need a bigger radiator for your vehicular transport thingy.


How do you know if thermostat on 2000 grand am needs replacement?

if your car over heats alot then that is a pretty good sign. aslong as it isn't your water pump. but thermostat is a good place to start. if you replace the thermostat and it still over heats. (assuming that is why you are asking) then it could be the water pump.


After replacing heater core car overheats on 1995 Pontiac Grand am SE changed the thermostate but it still over heats would could be the problem?

maybe its u or da car