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EDIT: Haha! I hadn't noticed: "wobbling dizzy" Now that's funny! :)

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Not normal, no matter how it wobbles.

If the shaft is tight but wiggles back and forth as it turns, that may be due to a bad rebuild.

If the shaft is loose and you can wiggle it back and forth with your fingers, it needs rebuilding.

Edited by FastWoman

I had a wobbling dizzy when I installed a new mallory unit. Turned out to be a badly machined coupling at the bottom of the distributor. You might take your current one out and make sure that it is aligning properly with the oil pump drive and that the oil pump drive coupling is good shape.

  • 3 months later...

I have now upgraded my old distributor and it is no-points now. But it still wobbles! The engineer who upgraded it, said it worked fine on his tests (and it works fine in my Z too BUT IT WOBBLES!!) I have tested 2 oil pump drive couplings and no effect. So what's left to inspect?

I have 500 mile roadtrip ahead tommorrow so...

Could be a bent shaft or bushings worn allowing the shaft to wander (see "wobble")..... Heard about one where the offset slot had been forced on the oil pump drive so hard it bent the shaft.

wobbilyous maximus.... will interfere with all that elecrtical stuff that goes on inside the distributor unless the guts and the housing are doing their dance in tandem...... but that is a whole other story......

Did your engineer check or replace the dizzy shaft bearings when it was upgraded, or just put in the electronic ignition? Also, how "much" is it wobbling?

If it's got less than .020" total side-to-side slop, it's probably OK to use with the electronic ignition. Most electronic ignitions are very forgiving of dizzy shaft wobble. If it's got more slop than that, I'd keep looking for a root cause.

Even so, I'd check it after your trip to see if it's getting worse...

I still don't understand what you mean by wobble, is it the center shaft flopping around in the housing, like a bad bushing or bearing? Is the rotor rotating off center like the shaft is bent? Or is the whole bamn thing, housing cap and all moving around? Please explain.

If both the oilpump rod and dizzy are straight and tight then the wobble has to come from the alignment or coupling between the two. As I said in my post above, when this happened to me my dizzy was straight and so was my oil rod but the coupling was machined wrong so the entire thing wobbled like a hula dancer. Mine was so bad that the car was undrivable as the dizzy would "pop" off of the oil rod with any RPM above idle. If it were me I would pull the oil pump rod and confirm that it couples nicely to the dizzy on the bench. I would also check the inside of the timing cover and dizzy mount for any wear that would cause misalignment. If there is no wear now there soon will be with the dizzy moving around.

Edited by steve91tt

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