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How would my car run without the radiator fan

Ok wen i start my car it run fine but after the engine warm up it start bubbling i was thinking its because of the fan not working

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  • Honda Master
  • 20,706 Answers

Bubbling at the RAD cap to the expansion tank is.:
1: overheating, and all cars overheat, parked, running and no fan.
2: blown head gasket. or far worse....
3: bad rad cap, the gasket is bad in side it.

the FSM covers the fan test, read that.
or login to alldata.com and read engine cooling. section.

Posted on Feb 09, 2014

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Posted on Jan 02, 2017

  • 59 Answers

SOURCE: radiator fan stays on all the time and car runs rough

The fan relay may be malfunctioning (the fan relay is what actually switches the fan on and off and gets its signal from the ECM, which in turn gets its signal from the temp sensor) testing/replacing the relay and temp sensor would be the best thing to start with,... unless you notice any additional (non factory) wire attached to the power wires to the fan.  Sometimes folks, in an attmpt to fix  an overheating or fan relay problem, attach a ignition switched positive lead from the fusebox or other switched source to the positive poer lead on the fan,.. making the fan run whenever the ignition is switched on.   

Posted on Nov 12, 2008

  • 210 Answers

SOURCE: 1997 honda civic over temp. Have replaced

Generally if one hose is hot, and the other hose is cold it indicates that they water is not circulating. You could have a defective thermostat. Take the thermostat out and run the engine without it. With the radiator cap off you should see a lot of water moving through. It that is the case, replace the thermostat and you should be ok. If there is no rapid movement of water it may be the impeller on the water pump came loose. This is rare, but it can happen since the impeller is usually pressed on the shaft. You should also check and see if you get a lot of bubbles when the car is running and the cap off. This often indicates a blown head gasket. Hope this helps.

Posted on Aug 10, 2010

  • 1 Answer

SOURCE: 03 Mini Cooper Power Steering Fan will not run

2006 mini cooper s power steering fan seezed. replaced with new fan won't run?

Posted on Apr 12, 2011

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2 Answers

Overheating


Be sure the radiator is full of coolant, Start the engine when cold, while engine is running feel the top radiator hose. As the engine warms up the upper radiator hose will suddenly get hot when the thermostat opens. If the upper hose stays cool, the thermostat may be stuck closed. If thermostat is stuck closed It must be replaced.

Without knowing more about your car, this is all I can recommend.

Apr 23, 2014 | 2001 Chrysler 300M

2 Answers

93 GMC Safari overheating. This happened spontaneously. Runs hot very quickly when I drive it. There is antifreeze in both radiator and overflow res, overflow res fills up more after driving a bit. ...


It would appear your thermostat is stuck in the closed position , find where it is on your engine, drain coolant and remove thermostat housing and stat, replace housing(liquid gasket OK) and coolant. now run engine, turn heater controls to hot leaving filler cap off, top up any water to max and replace cap now warm up to temp until fan comes on. if all ok replace thermostat with a new one and new gasket, you could also flush the sytem out at the same time with a hose pipe by loosening one of coolent pipes and flush radiator.

Nov 04, 2013 | 1993 GMC Safari

1 Answer

CAR CONTINUES TOO RUN HOT AFTER REPLACING WATER PUMP, THERMOSTAT, AND RADIATOR, BEEN TOLD IT MAY HAVE AIR BLOCKAGE, DON'T THINK IT HAS A CRACKED HEAD OR BLOCK, DOES NOT LEAK WATER, NO WATER IN OIL, OR...


Try this.

With the engine cool remove the radiator cap. Now start the engine and let it warm up to the point where the thermostat opens. You can usually tell when this happens by checking the temperature of the upper radiator hose, and the coolant level in the radiator. It will start getting a lot hotter quickly when it does and the coolant level should drop.

While the engine is warming up, watch the coolant in the radiator for air bubbles. Fill up the radiator as needed while continuing to watch the coolant level. Having the radiator cap off while doing this allows the trapped air to escape more easily. If you do have a large air blockage then when the thermostat opens you should see a large drop in the coolant level. You want to keep the Radiator full. Once the air bubbles seem to have stopped you can replace the radiator cap.

You may have to repeat the process a couple times if there is a large amount of air trapped in multiple pockets.

A cracked head or block you can usually diagnose as there will be a lot of small bubbles coming out constantly while the engine is warming up, and even more bubbles if you rev the engine higher as the compressed air/fuel will be forced into the cooling system.

Feb 03, 2011 | Cadillac DeVille Cars & Trucks

1 Answer

No heat in cab.


You did not BLEED the radiator and it's over heating.

Take off radiator cap when engine is COLD

Start engine

Let it idle until it's HOT

As it heats up you will notice air bubbles coming out of the radiator filler neck.

Let car run until you don't see any more bubbles

Fill radiator coolant to keep it topped up to the hot mark.

Put radiator cap back on once you hear the fans kick on.

Done

You should now have tons of heat

Providing your water pump is working

Mar 31, 2010 | 2000 Chrysler 300M

1 Answer

Replaced thermostat, radiator on it, still over heats after about 15 minutes on idle.. Fan never seems to change speeds and idle jumps at higher temperature. Any Ideas?? Thanks!


When engine running, ensure no engine combustion gas bubbles in coolant resevoir (if so, the head gasket is blown).

Check radiator cooling fans are operating ok (as required when car warms up) - if not check
1) fuse,
2) relay operation,
3) heat sensor switch.

Check for collapsing (soft) coolant hose on suction side of waterpump when engine revs above idle.
Check the coolant pressure cap is serviceable & of correct rating,
Ensure cooling system is correctly filled, bleed off any airlocks as necessary,
Check radiator cooling core is not blocked internally or externally.

Jan 17, 2010 | Ford F-150 Cars & Trucks

1 Answer

Every now and then when I turn off the car I hear water surging from the motor for about a couple of minutes and the temp gage reads normal? 3.0 Liter V6


sounds like u hav an air bubble in radiator from cold take radiator top off then rev engine to see if it bubbles if it does do this till it stops bubbling then top up wen it cools down then put radiator cap on then check heater gets hot wen warm then this is solved

Aug 24, 2009 | 2005 Lincoln LS

2 Answers

OVER-HEATING!!


when i had the problem it was my themostat. easy fix, may also be your radiator cap needs to be replaced.

Jul 31, 2009 | 2000 Honda CR-V

2 Answers

My VW Cabrio is overheating after 1-2 miles. Coolant in recovery tank is boiling by this time and making bubbling noises. Someone changed radiator hoses, flange, some housing. They are saying that radiator...



Run the engine and look at the header tank , is there lots of air bubbles coming back out of the water if is then the head gasket may have split and that is down to either a can of Radweld or a strip down repair

If the radiator is not uniformly hot them I would go for that as your problem

Normal operation is that the engine starts the thermostat is closed , engine block heats up and opens water starts to circulate around the block

So to check that you need to fill the radiator with cold water run it for a few minutes check the bottom hose it should be cold

The stat opens and the bottom hose should get hot as the water from the block is pumped into the radiator for cooling.

The radiator should get hot all over and the cooling fan should kick in when the sensor hits the over limit stop.

If that does not happen then get someone to remove the stat altogether (It is only there to get the engine block warm quickly in cold regions )

In which case the bottom hose should go from cold to warm to hot

Jun 23, 2009 | 1997 Volkswagen Jetta

2 Answers

I would like to know the posible causes of engine running hot.


was the engine overheating before this repair? and again do u have bubbles in the coolant tank when the engine is running?, this is best checked when the engine is 1st started. I ask because I think u may have a leaking cylinder head gasket, this would account for the overheating still occurring.

Feb 26, 2009 | 1996 Nissan Quest

2 Answers

Cold heater


Thermostat is faulty. Change it to fix your problem.

Jan 21, 2009 | 1993 Subaru Legacy

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