do fan clutches often come bad new?
- Thread starter SLmateo
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nickthehick78
I'm Awesome
the heavy duty ones feel engaged most of the time, never feel like they free wheel. i have had new ones that were tight when hot, but if you spun it 2-3 revolutions it would spin free....made me over heat. i put a diesel clutch on my buick 455 to help with cooling....it is loud all the time. i read somewhere stock gas clutches run at like 60% and diesel ones are more like 85% engauged......something to look into, but the diesel clutch cools my big block with no fan shroud, and a 27" radiator core!
Ya the severe duty that I put in spins at 80 to 90 water pump speed (maybe same as diesel?) compared to 60 to 70 of the standard duty, but supposedly they both disengage and spin at roughly the same speed to my knowledge. I don't really know how to test it other than waiting for it to cycle or spinning it by hand and feeling resistance. Seems like it's engaged the whole time or maybe I'm just expecting it to drain the same speed as the old one...
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