Question about 1995 Pontiac Bonneville

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Overheating problem i have no engine fan is that the problem

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  • 706Cajun
    706Cajun May 11, 2010

    Is the fan missing?

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  • Master
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Yes, no engine fan will cause the engine to overheat in traffic or at lower speeds. I assume you still have a belt on the water pump and it is turning -- is this correct?

Posted on Apr 23, 2009

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I assume you mean engine cooling fans. The primary fan is bolted to the water pump and turns with the engine-always runs. The other fan is for when the engine begins to overheat. the coolant temp. sensor triggers it at high temp. You'll hear it kick in. My 1.8L Suby's have rarely utilized this electric fan. Be careful looking around under the hood. Both fans are right there on the front and ready to hurt you. If your car is overheating and this secondary fan has not come on, then it's not working. But you should look deeper to find out why the overheating is occurring-this fan is for "normal" overheating;long steep climbs etc.

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if engine over heating coolant over flow jug will boil over you will see steam.sound like you have either faulty engine coolant temperature sensor or could have faulty fans relay or fuse or pcm problem if coolant fans dont turn on.have garage with code scanner that can do a snap shot on coolant temperature sensor check see how hot coolant temperature is see if coolant temperature over 220 degrees engine getting too hot.could have faulty water or blowed head gasket check engine oil on oil dip stick look milkly you have blowed head gasket. i use infra red laser thermometor check see how hot engine is over 107 celsius engine is overheating.

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1 Answer

Crownvictorias2006 overheating all the time


Do you think that it's overheating because the temperature light is on? If so, then it's possible that you have a bad temperature sensor and not an overheating engine.
Look for other signs of engine overheating :
1. Sluggish engine operation.
2. Detonation upon acceleration (pinging).
3. Rough, uneven engine idle.
4. Coolant boiling in overflow tank.
If your vehicle is experiencing these symptoms, then overheating is indicated. One of the most common cases of overheating is a bad thermostat. Another common problem is a faulty cooling fan or fan circuit. The cooling fan can be checked by running the engine at operating temperature and turning on the AC control. if the fan does not come on, then a problem with the fan circuit is indicated. The thermostat can be checked by placing a cooking thermometer on the motor near the upper radiator hose where it attaches to the motor. the temperature should not go above 225deg. If it does, then replace the thermostat. If the temperature stays at or below this rating, then replace the temperature sensor. I hope that this information helps you with your problem and thank you for using Fixya.com.

WARNING : Be very careful when working around cooling systems when the engine is at operating temperature. DO NOT open the radiator cap (if equipped) or even the overflow tank cap when the system is hot. Always wear safety glasses. Remember that electric cooling fans can operate at any time, even after the engine is off. Keep hands away from fan when working in the engine compartment.

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1 Answer

My 2007 Impala LS says its overheating shut off A/C the temp gauge goes all the way up then in an instant comes back down to normal


CHECK COOLANT LEVEL TO MAKE SURE NOT LOW.IF ALL LOOKS GOOD.CRANK ENGINE LET IDLE FEW MINUTES TURN ON AC MAX LEVEL TO SEE IF COOLANT FANS COMING ON.IF NO CHECK COOLANT FANS FUSE AND RELAYS.IF COOLANTS FANS COME ON WHILE ENGINE OVERHEATING THERMOSTAT BAD.IF ENGINE OVERHEATING FANS NOT COMING ON YOUR COOLANT TEMPERATURE SENSOR FAULTY.

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Overheating


WHEN CAR STARTING OVERHEATING MAKE SURE COOLANT LEVEL DIDNT GET TOO LOW. IF NOT I WOULD REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP IF OVERHEATING WHILE SITTING IDLING COOLING FAN NOT COMING ON.CHECK COOLING FAN FUSE AND RELAY IF ALL IS GOOD.CHECK COOLING BY HOTWIRING IT.IF RUNS YOU HAVE A BAD COOLANT TEMPERATURE SENSOR OR FAULT IN WIRE CIRCUIT.IF FAN DONT RUN WHEN HOTWIRED REPLACE FAN MOTOR.IF CAR STILL KEEP OVERHEATING CHECK ENGINE OIL LOOKS LIKE MILK BLOWN HEAD GASKET.IF OIL LOOKS OKAY YOU NEED RADIATOR AND ENGINE FLUSHED OUT.

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This Could Be a NUMBER or Things.
1 Thermostat Sticking CLOSED.
2. Coolant Level LOW
3. LEAK in COOLING SYSTEM
4. If you have a 2 FAN System 1 Could Be Faulty
5. CLOGED / CORRODED INSIDE of RADIATOR
6. Radiator Dirty In the FRONT of it Restricting AIRFLOW

Sep 04, 2009 | 2002 Jaguar X-Type

1 Answer

Engine overheating


did u replace or test tempature sensor for fans it sends signal to turn on fan would change and also thermostat/antifreeze flush would be good maintance make sure u replace temp sensor for fans not gauge most cars have 2 sensors

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2 Answers

94 honda is overheating


I dont think the transmission has anything to do with your overheating problem...Check to see if there is water in the oil...If there is water in the oil then it could have a head gasket problem..Did you ever replace the thermostat? If it is stuck then it would also cause overheating...Excessive exhaust backpressure because of a clogged catalytic converter could also cause overheating..Also check belt tension and condition. A loose belt that slips may prevent the water pump from circulating coolant fast enough and/or the fan from turning fast for proper cooling...Another thing it could be is a faulty Water pump -- Any wobble in the pump shaft or seepage would call for replacement. In some instances, a pump can cause an engine to overheat if the impeller vanes are badly eroded due to corrosion or if the impeller has come loose from the shaft. The wrong pump may also cause an engine to overheat. Some engines with serpentine drive belts require a special water pump that turns in the opposite direction of those used on the same engine with ordinary V-belts... Also check the Fan -- With mechanical fans, most overheating problems are caused by a faulty fan clutch, though a missing fan shroud can reduce the fan's cooling effectiveness by as much as 50% (depending on the fan's distance from the radiator) which may be enough to cause the engine to overheat in hot weather or when working hard.

Mar 21, 2009 | 1994 Honda Civic

2 Answers

Overheating


Did you ever replace the thermostat? If it is stuck then it would also cause overheating...Excessive exhaust backpressure because of a clogged catalytic converter could also cause overheating..Also check belt tension and condition. A loose belt that slips may prevent the water pump from circulating coolant fast enough and/or the fan from turning fast for proper cooling...Another thing it could be is a faulty Water pump -- Any wobble in the pump shaft or seepage would call for replacement. In some instances, a pump can cause an engine to overheat if the impeller vanes are badly eroded due to corrosion or if the impeller has come loose from the shaft. The wrong pump may also cause an engine to overheat. Some engines with serpentine drive belts require a special water pump that turns in the opposite direction of those used on the same engine with ordinary V-belts... Also check the Fan -- With mechanical fans, most overheating problems are caused by a faulty fan clutch, though a missing fan shroud can reduce the fan's cooling effectiveness by as much as 50% (depending on the fan's distance from the radiator) which may be enough to cause the engine to overheat in hot weather or when working hard.

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