Question about 1998 Oldsmobile Intrigue

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Over heating It appears that the electric fan does not come on at all creating overheating. I have replaced the thermostat, thinking that was the problem and discovered the fan problem. Is there a sensor that needs replaced to allow the fan to operate? If so where is it?

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  • Oldsmobile Master
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You might try the following; Turn on your AC for a moment and check to see if both fans run. On most cars, this will let you know if the fan motor has failed or not. When the AC is turned on, most will bypass the temperature switch via relay and run both. If the engine fan doesn't turn on it may just not have been asked to run though.
If they both run, then its time to crawl under and check the lower tank of the engine radiator for a device screwed into it with either one or two wires coming from/to it. These are pretty common failures and are bimetal thermal switches that monitor the incoming coolant temperature to determine if the fan is needed or not. You shouldn't need more than a properly sized or even a Crescent wrench. I would suggest wrapping a few layers of Teflon plumbing tape around the new one before installing it.
Somewhere under $50 US and could be far cheaper. You might call a couple of places to see who has the fairest markup.
If you leave the system closed and the engine is cool, have a catch basin under the switch area and you may not have to drain your system since the coolant will not gush out due to the vacuum formed by the coolant trying to escape.
If you lose any on the ground, hose it away to dilute it and avoid having the toxic stuff lapped up by an animal; it's kind of sweet and many dogs and cats will drink it if available. 

Posted on Oct 02, 2008

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3 Answers

Why does my fan always run intermittently? During traffic jams my fan will run about 25 times intermittently, and I check my temperature it is still normal?


sounds like problem with the temperature sensor or relay that controls the fan(if electric) check the sensor and relay one may need to be replaced.

Mar 24, 2015 | Cars & Trucks

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Honda civic


check if you have a viscous fan hub as from what you describe it appears that it has failed and is not driving the fan when idling. If you have an electric fan then it is not working properly if at all.

Aug 01, 2014 | 2002 Honda Civic

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My pajero is overheating afew minutes after starting what could be the cause?


An overheating engine is more than a bummer, it can be an expensive engine killer that will leave you on the side of the road, then on to the repair shop for an expensive repair bill. If your car has been running hot, you know the feeling. You're sitting in traffic, the light turns green, and you pray that traffic breaks enough for you to get some air flowing over the radiator so that engine temperature needle will go down just a little bit. It's beyond stressful, and there's no reason you should be forced to endure this. The fact is, there are only a few things that commonly cause an engine to overheat regularly. 1. Low Coolant By a large margin, the most common cause for engine overheating is simply a low coolant level. Your engine's cooling system relies on coolant to circulate and remove heat from the engine. If you don't have enough coolant in there to do the job, heat will build up and your engine will overheat. No amount of running the heater in the summer will help if you don't have enough coolant in the radiator to transfer that heat. By far, the first thing you should do if your engine seems to be running hot is check your coolant level. 2. Electric Cooling Fan Failure If you have an electric cooling fan that isn't coming on, this can cause your engine to overheat. The electric cooling fan draws cooler air through your radiator when your car isn't going fast enough to ram it through from the front. You can test this by letting your car idle long enough for the engine to heat up. If you've been having an overheating problem in traffic, keep an eye on your temperature gauge. When it starts creeping into the danger zone, look under the hood to see if your electric fan is running. If it's not, you'll need to figure out why. There are two usual causes to this:
2a. Bad Electric Fan: Sometimes your fan motor will just burn out and your fan won't come on at all. To test this, find your radiator fan switch and disconnect the wiring harness. Get a jumper wire and insert it into both contacts, your fan should come on. Another way to test the fan is to turn on the air conditioning. Most, but not all, cars activate the cooling fan at either a medium or high speed when you turn on the AC.
2b. Bad Radiator Fan Switch: There is a switch that tells your cooling fan to come on when your coolant reaches a certain temperature. The easiest way to test this switch is to disconnect the wiring harness and then run a jumper wire across the harness contacts. If the fan comes on, you need to replace the switch. 3. Thermostat Not Opening The most common symptom of a failed thermostat is overheating at highway speeds. Your engine may be able to stay cool at low speeds because it's not working that hard, and therefore not creating as much heat. But at highway speeds your engine needs lots of coolant flowing through. If the thermostat doesn't open, there isn't enough flow to keep things cool, and you'll find yourself looking more like a steam ship than a sedan going down the highway. 4. Broken Fan Belt There are still lots of engines out there which have a fan belt to drive the engine cooling fan. If you see a belt attached to your fan, you're in this club. The good news is your repair is always cheaper than the electric guys. You can replace your fan belt easily if it's broken. 5. Clogged Radiator If your car has more than 50,000 miles on it, your radiator could start getting gummed up. You can avoid this and other problems associated with old coolant by flushing rad every year.

Nov 26, 2013 | Peugeot Liberte Cars & Trucks

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My 2003 dodge durango keeps overheating , i just had new radiator put in and it started overheating again but now it is overheating with a very loud screeching noise like a belt sound what could be ca


as for noise will have to inspect under hood,could be fan or belt or pulley ,water pump .these are some things it could...My suggestion for overheating is replace thermostat. If your car has electric cooling fan then it may not be working..turn defrost on and if fan kicks on then fan motor is good..Now this does not mean that fan is working properly because fan is controlled by heat sensor switch that kicks fan on when motor reaches heat range......Things i would have checked....hope this information helps and good luck and Please rate my post...

Aug 17, 2012 | 2003 Dodge Durango

1 Answer

Overheating


Possible sticking thermostat (probable) but you could have a fan thermostat going bad also if it has an electric fan, next time it starts over heating look under hood and see if the fan on the radiator is spinning, if not it or the thermostat for it could be bad

Feb 17, 2012 | 1997 Subaru Legacy

1 Answer

Hello I have a 1989 chevy c1500 truck and when I turn the engine light does not but when heated turns on and you change the alternator and air pump and thought you might be the thermostat that all you have...


I"m not sure what the problem is, this sounds like the engine light is coming on because its overheating and you replaced the airpump and alternator and now you thinks it is the thermostat. if this is correct then yes replace the thermostat and also check the fan clutch, when engine is hot the fan should not spin freely. and last are you sure the engine light is on due to it overheating, if it is due to overheating then check fan clutch and replace the thermostant

Feb 17, 2012 | 1989 Chevrolet C1500

2 Answers

Engine over heats


Check for collapsed radiator hose first.

Do the cooling fans come on? If not, check fuse, relay and if still no function- fan thermostat switch.

If fans do come on, replace water pump.

Jan 24, 2012 | 2001 Plymouth Neon

1 Answer

Hello... I got problem with my honda odyssey. For the past 3 days, if i start the engine, after 5 min the temperature will goes up to HOT and engine indicator light-up. I turn-off the engine and then start...


Your English is very good.

From what you have described, which is a rapid over heating of the radiator coolant fluid and therefore a hot engine condition, it would appear that the thermostat in the engine's cooling system is faulty.

If the thermostat is sticking in the closed or nearly closed position temporarily, there will be no flow or very little coolant flow between the engine and the radiator and the engine will overheat.

You have advised that after the engine is shut off , and radiator coolant fluid has cooled, you re-start the engine and drive the car without the overheating condition occurring again and the radiator coolant temperature is normal. This time there is no overheating because the thermostat is working normally.

You should have the thermostat replaced as soon as possible because allowing the engine to overheat can cause very expensive engine damage.

If you had a continuing overheating condition then I would suspect both the thermostat and the water pump. However as the overheating seems to be only temporary, and clears itself after you have shut down the engine and re-started it 10 minutes later (without further overheating arising) then I think you only have a faulty thermostat.

Please also check that the electric fans which draw air through the radiator are operating. These run on a temperature sensor and will switch on automatically once the radiator coolant fluid reaches a certain temperature and then switch off again when the fluid temperature reduces. You will hear them running once they start up. If these fans are not working the radiator coolant can quickly overheat in various driving and temperature conditions because there will be insufficient air flow through the radiator to cool the fluid. If the temperature sensor is faulty or has died, or if the electric motors running the fans are faulty, the fans will not operate.

I hope this helps.

Dec 18, 2010 | Honda Odyssey Cars & Trucks

1 Answer

My car is overheating and i need to know how to put in the water pump?


Is the water pump leaking coolant? If not, then why do you think it's bad?

If the engine is overheating, there are several other things to look at before you consider the replacing the water pump.

Are the fans electric motor driven, or fan belt driven? If fan belt driven, replace the fan clutch. If electric motor driven, check the fan control module and/or fan motors to make sure all is good there. Fan control module tend to fail in weird ways, so if nothing is wrong with the motors, replace the module.

Always, always, replace a thermostat that has overheated. Once overheated, they consistently fail. Make sure you properly refill the radiator with coolant after the stat is changed.

Check that the bottom radiator hose does not collapse.

Check the radiator for corrosion. Boil the radiator out, or have it done, or replace the radiator.


Dec 18, 2009 | 1997 Buick Skylark

1 Answer

Overheating/fan not starting


yeah if ur thermostat is sticking close i will make it over heat

Jun 05, 2008 | 1994 Pontiac Grand Prix

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