It says:

a. Remove bimetallic strip from front of fan clutch.

b. Drill small hole through bimetallic strip and tap for M3 bolt.

c. Screw M3 bolt through strip and preload strip approximately 1 mm (give strip 1mm bow). Use lock nuts on both side of M3 bolt to lock in position.

The 1 mm preload fools the clutch into full couple, while centrifugal disconnect at 3250 rpm still remains.

__________________
Jim