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$1700? Tell them to FO. I paid $550 at a local place that custom makes a high volume of them for global replacement applications. The entire thing is copper and brand new, they only reused the end tanks. It was an amazing process to see it all happen. They will likely not show a listing for...

I didn't know you just tightened it. Sorry.

Mine seemed tight to begin with. I loosened the blade fasteners, re-tightened them, and my noise went away. If I was you, I would break them all loose, and re-tighten them all. Maybe even pull the blade off and look closely at it and the mounting area on the hub. Each their own, all I can do...

I thought I read it pulls 15hp at speed when engaged. I'd still loosen and retighten all fan attachment fasteners, just sayin'.

When I say mine are loose, it la is kind of strange but it means the bolts are snug like rusty snug, but loosened up. If I put a wrench on them, they are still tight, but need to be taken out, cleaned, maybe lubed, amd reinstalled tighter. I can slightly pull the fan away from the clutch hub...

OK. That is slightly different than mine. My A2 is a Horton clutch and the fan blade is fastened with bolts, not studs/nuts. I'd like to convert it to studs/nuts to aleviate the looseness issue I am having.

Blade attachment bolts are loose. Reach in front and you can feel the washers will be loose, indicating the bolts loosened up. Common on these. Done mine twice so far, will add Loc-Tite next time, but I think it may be caused by the multi-layer composition of the fan blade hub actually.

Mine is a Horton, and generally well behaved. I have noticed that recently, on a cold start, meaning less than 40F outside, it will be engaged and spinning the fan on initial start up, with zero truck air pressure. I know that is how todays big rigs are as a fail safe, but for ours, the...