Oil pump drive rod to long.

Thanks, Cliff.  Do you know how much end-play there should be between the housing at the collar and the relative distance from the collar to the end of the shaft at the oil pump drive tang?

I don't know, however I always check to see when the distributor. gear is resting on the machined surface in the block that there is still some end play in the oil pump drive, I have seen some blocks that were machined to deep (same problem), this can be fixed with a shim, the oil pump drive can be cut down, if it's a rebuilt distributor. the gear maybe located in the wrong place, I know it's a lot to check.

Lanny,  I would be looking at the condenser first, you said previously that you checked the wire so as long as it is not pinched where it enters the distributor the only way I know of that could provide a ground with the points held open would be a shorted condenser or a bad insulator on the points.  

Cliff brought up a good point about the oil pump drive being to long (or the wrong length distributor shaft) placing upward pressure on the distributor shaft.  Is the distributor original or a rebuilt, there was a problem a while back with the 57 and up distributors being built with the wrong length shaft (they were to short) but who knows what goes on at the re-builders

Thanks again Cliff and Kevink.  I remember many years ago finding a brass washer-like shim(?) part with my spare distributors, caps, etc. and maybe I should have installed it.  Possibly the block was machined and/or cast a little bit too deep.  The dist. is a rebuilt and has been in use for about 3,000 miles.

I pulled the dist. yesterday, pulled the points and condenser, cleaned the plate, checked the coil and ground wires, reinstalled and set the points and condenser as they appear to be in good shape. and then re-installed the dist.  I will re-do yesterday's tests today, especially on the condenser.

I will attempt to find the shim to install and maybe file off a tiny bit from the tang to relieve the uplift pressure on the shaft which ostensibly will allow for clearance at the rotor and cap.

The rebuilds that Cardone sold has a 289 type triangular shaped body the Y block has a round body. They drilled and relocated the hole for the gear, how accurate is questionable and it's a critical dimension.. The shaft is also shorter where it engages the pump. If I recall end play should be .022-.030. If the stack of tolerances for the end play, cap, rotor add the wrong way the rotor can be to high in the cap as you are experiencing. I had that happen on one dizzy and just sanded off .015 from the bottom of the rotor, worked fine after that 

A triangular (Motorcraft) body by itself does not indicate any problem with the distributor.  I have two, one points, and the other retrofitted duraspark.  Both have correct dimensions.
The problem with shafts began in the past few years.


Lawrenceville, GA

I would check the drive gear to distributor base measurement first to see if that is correct. Replacement shafts required drilling and it could have been done incorrectly.

Ian57tbird, do you know the measurement?

I reinstalled the distributor yesterday- number one cylinder on compression, rotor on number one cap wire, timing mark at 3 degrees, and did a test-lamp test at number one spark plug.   Everything checked out and after the work yesterday inside the distributor I have good spark at the points which have been set correctly.Still I cannot get it to start.

I did not change the condenser, but with good spark at the points I would presume that the condenser is ok, Am I correct?  I suppose I could have a weak coil (about 3000 miles on it) but do not know how to check the out-put performance short of grabbing the number one plug wire end.  Its been a looong time since I fell for that one!

Once I get it running I can address the dist. shaft or simply buy another rebuilt but I don't want to just start throwing money at guessing what is wrong.  I've already just installed a freshly rebuilt ECK from the Hot Rod Reverend.

Lanny, one purpose of the condenser is to prevent excessive arcing of the points.  Could be a condenser problem.  Pull the coil wire from the distributor, hold it close to a ground and crank the engine.  You should see a fat spark at the end of the coil wire.  No spark could be a bad coil wire, coil, or condenser.  A good spark there and no spark at the plugs means a grounded rotor, a distributor cap issue, or bad plug wires.

John - "The Hoosier Hurricane"