>
> A dumb question: is the fan extension still needed if the mechanical fan
> has been removed? It looks to me as if the fan extension also secures
the
> pulley.
>
> Trevor Jordan
> 74 TR6 CF29281U
>
Trevor-
No such thing as a dumb question...but answers...that's a whole 'nother
ball game
Basically, no, you do not need the extension to the pulley. HOWEVER, there
a several caveats.
1- The extension does hold the pulley on the crank
2- The extension is "pinned" to the pulley with 2 dowels.
3- The sheer mass of the extension is taken into account when the
"balance"
of the bottom end is done. The mass isn't that much, and
it is concentrated
almost on the centerline of the crank, but the fact that
it extends beyond the end of the crank
tends to cancel out some of the " torsional" vibrations
in the rotating masses.
Now with that all said and done, I have machined spacers for the front
pulley that have worked satisfactorily for me. You should try to make the
spacer at least 3/4" thick and approx 3" in diameter. The back of it will
have to be contoured as the original, and should also have the pins/holes
installed. A careful balance job afterwards has worked for me and allowed
that extra 2"-3" or so of distance between radiator and extension to be
better utilized.
Just can't leave it alone...
Nick in Nor Cal
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