Thursday, September 22, 2011

Radiator fan not blowing?

I have a 1996 Dodge Grand Caravan 3.8L..



The engine gets REALLY hot after only about 5 minutes of driving (boiling hot, way hotter than a similar engine driven for only 5 minutes).. I'm starting to suspect that coolant is not circulating correctly. It gets so hot that even the rubber in the engine (for example - spark plug wires) are too hot to touch.



In addition, the radiator fan is not blowing. It wont even blow if MAX ac is on. Radiator fan fuse is fine.



What should I do? I think a good first step is to change the thermostat. Will this rectify my problem? Does a thermostat have anything to do with a radiator fan? Does a thermostat have anything to do with coolant circulation?



How do I test the radiator fan to see if the motor is working? I only have basic tools, what do I need to buy?



In addition, the belts %26quot;squeal%26quot; a bit loudly on this vehicle. Could this affect the coolant circulation or radiator fan operation?



Thanks for any help.Radiator fan not blowing?
Start by checking the coolant level in the radiator. Make sure it's cool and not under pressure by squeezing the upper radiator hose. If it's full then your problem is probably only with the rad. fan. If it's low then top it off and see if that takes care of it. Then check for leaks.



Check the fan by turning the ac on high and tapping on the fan motor. If it comes on then replace the motor and recheck the overheating.Radiator fan not blowing?
because the belt has a tendency to squeal, and you have a difficult time keeping an engine cool, i would assume that the water pump has failed or is failing in a manner that restricts its rotation. remove the belt and give the pump a twirl. if it does not spin easily if at all, then that is your problem.Radiator fan not blowing?
check the thermostat and the fan should blow. put power through the motor and see if it turns. if not replace it. if it turns it is a sensor problemRadiator fan not blowing?
take off fan ...if its run by the pulley then its your fan clutch that needs to be replaced ......... if its electric then take it off and check with a 12 volt battery ........ if it works its your temperature control switch or fan control switch [ some vehicles have two]Radiator fan not blowing?
ON A CARAVAN IT HAS A MODULE FOR THE COOLANT FAN. IT IS LOCATED DR SIDE ENGINE COMPARTMENT BEHIND FRONT BUMPER. ITS A SMALL SQUARE BOX. CALL DODGE THEY HAVE THEM. ITS HARD TO FIND HAS 2 MALL BOLTS.Radiator fan not blowing?
Without the fan blowing the engine will overheat quickly while you're standing still. Moving fast will circulate air to cool it somewhat.To see if the fan (electric fan) works at all, try to power it with a wire from the battery positive to the fan itself. Replace it if it won't run. If you can jump the fan and make it go, check the fan RELAY. They burn out and cause the same situation you have too. The belts should be tight enough to not squeal. If they always squeal, it could be a loose belt, or a worn out or frozen water pump. If you take off the belt you should be able to easily turn the water pump by hand. If it won't turn or is real stiff, replace it.



I hope you shut the engine down quickly after you noticed it getting overheated. An overheated engine can be damaged by cracking or warping heads, bursting head gaskets, galling cylinders- you might be lucky and not have that much damage. But don't push you luck, you can still mess it up really badly by running it too hot.



I had a Mitsubishi/Dodge water pump freeze up. There was lots of constant belt squeal and the engine overheated. I was lucky to be able to fix it with a new water pump and head gasket.
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