The Ford Barn - View Single Post - crab- rotor clearance to-cap termanal

Terry,OH · 02-15-2014, 09:51 AM

Ford had a Spec. for the gap between the rotor and the cap. Not only for the 21A but also the other earlier distributors. It is published in the service bulletins about 46-48. Ford did not publish the diameter of the rotor turn circle, so the gap Spec. is more to inform mechanics what the gap between the parts should look like. I do not have the Bulletin with me but from memory the gap is very tight lets say 0.005-8-10. You can view the earlier distributor gaps, to find one with gaps around 0.030, the mechanic knows there is a problem.

02-15-2014, 09:51 AM	#13
Terry,OH Senior Member Join Date: May 2010 Posts: 4,753	Re: crab- rotor clearance to-cap termanal Ford had a Spec. for the gap between the rotor and the cap. Not only for the 21A but also the other earlier distributors. It is published in the service bulletins about 46-48. Ford did not publish the diameter of the rotor turn circle, so the gap Spec. is more to inform mechanics what the gap between the parts should look like. I do not have the Bulletin with me but from memory the gap is very tight lets say 0.005-8-10. You can view the earlier distributor gaps, to find one with gaps around 0.030, the mechanic knows there is a problem.