Question about 2003 Dodge Durango
A viscous coupling(fan clutch) works with gel inside the coupling. When heated(engine getting hot) it engages the fan and the louder noise you hear may be the fan engaging. It should not be audible under normal running conditions and moderate heat. You do hear it after just having started the engine but should go away about 30 seconds later. With the engine at operating temp and switched off you should be able to easily turn the fan by hand. You will feel resistance and attempting to spin the fan by hand will have it turn only about a quarter turn by itself. If you cannot turn the fan at all then it has either been replaced with a direct drive unit, or has been modified. (Some of the less scrupulous service centres will drill a hole through the old coupling, put a bolt through it and tel the customer it has been replaced!!! ) Neither are acceptable practice if the customer has not been informed of this.
If it's been modified you should be in for a refund of sorts if you were charged for a new viscous coupling. If it was not modified, raise the question with the service centre and ask them if they could identify the sound, just to be safe.
Posted on Aug 05, 2010
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Posted on Jan 02, 2017
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