Quote:
Originally Posted by guntherrex
Has anyone ever experienced this? The mechanic that took a look thought it might have been a sensor that got caught in the blades, seems like a design flaw? it's unlikely anything can fly in there from the road, road was clear when it happened. (sounded like I hit a big branch)
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The only logical conclusion is the viscus clutch locking up. About once a year somebody on xo reports this happening.
Collateral damage often is the coolant reservoir or a dent in the hood, the fan shroud of course.
The viscous clutch is warmed from the coolant in the water pump.
Edit: seems it’s actually actuated from a bimetallic strip on the front of the fan clutch and heat wash from the radiator kicks on the fan when the waste heat from the radiator gets to a particular temp.
Even when warm you can stop the fan it should never lock up.
When cold you can (and I have) stipped the fan with my fingers.