> << The viscosity of the fluid clutch increases as the temp behind
> the radiator rises. If the clutch doesn't get as hot, the fluid
> won't get as thick and the engine won't have to work so hard
> to turn that windmill. >>
>
> WRONG!!
> The viscous coupling fluid does not change viscosity with temperature (at
> least not with the intent of spinning the fan). The fan is basically a pump
> internally. On the front of the clutch is a Bimetal element shaped like a
> spring. The center of the element is attached to a small shaft. As the
> element heats, it twists the shaft which is attached to a valve inside the
> clutch. As the valve closes, it causes more restriction in the fluid path,
> and therefore more engine torque is passed on to the fan blades.
>
> FYI - The FSM has a specific procedure for determining whether this clutch is
> good or bad!
YIPE! YIPE! YIPE! {tail between legs}
Man, when I'm wrong, I'm really wrong. Ha ha ha!!
Thanks for straightening me out. I don't know where I got
the idea about the fan clutch.
-Scott :^)
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:08:54 EDT