I have no rattle here in MI, and it has been colder than a "you know what." Finally took it to the dealer and got a new PS pump pulley to stop the squeak, and that has not returned.
You have a good idea about pulling the clutch fan and running the engine on a cold morning to see if this fixes the problem. Engine would not be hurt. I would suggest the dealer do this.
I'm at a loss guys. I have listened to at least six H3 starting up on very cold mornings, and not one had a rattle, only two had the belt squeak.
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Black Sheep Hummer Squadron
(ME TOO)
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