[Healeys] Help! ignition Guru

[Dave & M]

Hi Dave,

I believe I mentioned rotor clearance in a post about Pertronix, 
recently. The Pert timing sleeve reduces clearance.

If you are sure that the rotor is seated all of the way down - There 
are differences in rotor heights from brand to brand & maybe even 
within the same brand.

Also there are variations in the cap terminal heights. Sometimes you 
just have to find the best combination. Up to .020" can be sanded, 
filed, ground from the lower rotor seating surface.

The end play of the shaft is a SERIOUS problem. It should be no more 
that 0.002" or so. The space between the drive & the body can be & 
often is shimmed to reduce the end clearance. The gear is usually 
pinned to the shaft with minimum clearance,  but once the shaft is 
drilled for the pin, shims are the only way to tighten the end play. 
If your particular combination of parts worked recently, the shaft end 
play would be the only variable.

Hopefully, you can find a combination that will allow at least 0.030" 
clearance between rotor & cap.

Regards,
Dave Russell

Dave Schweninger wrote:
> Does anyone have the distance dimension from the shoulder that the  
> rotor rests on down to the top of the distributor body. For some  
> reason my distributor shaft is pushing the rotor into the cap. My  
> measurements show a .030 interference I would think the shaft is  
> about .060 too High. Also the end play on the shaft is .023. I am now  
> the owner of a melted Rotor.
> thanks
> Dave and Daisy  Now with a gorgeous body.