Installed new fan clutch
It turns out my original fan clutch has been bad since I bought the truck used in '05 and over 100,000 miles ago. The engine's never roared like it does now, and it used to get up to op. temp real fast. I've never had a problem with it over heating, I've hauled bed fulls of stuff, towed numerous trailers, been stuck in amazing Houston "rush-hour" traffic in 100+ degree days.
But now my daily commute is 15 minutes side street traffic, if I keep the tranny in 2nd gear at 40 mph @ 2500 rpm the fan is still roaring like crazy. So now my truck doesn't get up to my normal op. temp (recipe for sludge I think I read somewhere here).
My main question is I'm thinking about returning the new fan clutch and just staying with the old one (until I do the e-fan mod). Does this sound like a bad idea?
Next ? is more of a how it works deal. I think that when the clutch heats up enough or spins fast enough it will disengage and let the fan blades spin at a lower rate when the RPMs are high. But i'm confused why it roars so much at idle and very low RPMs. Wouldn't the fan blades still be spinning at the same speed as crankcase at idle with a good or a bad clutch?
Sorry for such a big post.