The Fan Clutch failed (was making a screeching noise) on my 78
Corvette.
Never had any cooling problem.
Replaced the clutch with one from Hayden.
The Hayden clutch engages a lot sooner (I can hear the roar of the
fan) compared to the original clutch.
I noticed that there is a circular bimetallic spring on the clutch;
its position can be adjusted.
Anyone tried to adjust the set point of the clutch ???