Electric Fans / Crankshaft

[Jack McCarrick <jmccarr@ibm.net>]

I thought the following might be of interest on the electric fan topic.

Bill Piggot's,  Original Triumph (New Edition, 1998) on page 71 talks
about the original fan as a crankshaft vibration damper. He makes the
following comment "Owners who have substituted an electric fan sometimes
experienced broken crankshafts owing to the loss of this damping
effect.  Careful engine balancing appears to prevent this occurance."

Sounds like caution is in order.