Yep I second this. I did a GM alternator conversion on an MGB once and went
through 4 or 5 alternators. I tried variations on mounts and spacers and even a
different type alternator. Edned up needing to have the alterantor balanced, the
mount reinforced (it was a purpose built mount and worked okay on the V8s but
not on the 4 cyl for soe reason), and the spacers had to be solid. Then the
little bugger worked fine.
"O'Farrell, Fergus" wrote:
>
> ref message from Adam Bradley:
> <<added spacers so the triangle bracket moved forward>>, <<If I had to do
> it all over again I'd get a non-smog water pump and pully, fan, shroud, and
> crankshaft pulley so it didn't have to sit so far forward. Now I've got to
> figure out some way to isolate the alternator (rubber washers?) so the
> vibration isn't transmitted through the car.>>
>
> other approach: the slack from the play between the multi-spacers is
> allowing the vibration. If you insulate from the vibes, the vibes will
> continue to chew at the alternator internals, whose bearings are not made to
> take it (short part life... heck you'll wear belts out too). Try going back
> to anchoring the bracket as solid as possible, then fab one piece spacers to
> shim/hold the alternator out in its' proper orbit. (Roman used a deep
> socket instead of washers, pretty damn clever, and really holds a shine!!)
> Or, dismantle the alternator and figure out what the imbalance is, although
> even bad vibes can be not too visually obvious.
> just my .02, Fergus O
>
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--
Marc Sayer
82 280ZXT
71 510 2.5 Trans Am vintage racer
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