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Old 12-12-2009, 07:47 PM   #1
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Too Much Distributor End Play and depth into block.

As I am investigating why I am running on 6 cylinders, I found that my rotor was messed up on the distributor. This led me to start checking out the dist. I came accross a Ford tech article on dist gear installation that says 4.031 to 4.038 from the bottom of the gear to the surface on the dist that seats against the block. I am at 4.070". I also measured the end play which should be .024 to .035 and I am at .069".

How do I correct this? Can you shim it above the collar? If so, how do you take it apart and where do you get the shims? Should I do this and also put a new gear on it in the correct location?

Should I fix this or just buy a new one?

Can this excessive play cause the dist to have excessive rotational play when installed in the block? The tip of my rotor rotates .25" back and forth.

I think I blew a head gasket because the engine runs the same when I pull the #2 and #3 plug wires. The end of the rotor fell off because of what looks like a manufacturing defect where the plastic "rivet" was not melted so it didn't hold the 2 metal pieces together. I am hoping that may have screwed up the timing or something and caused the gasket to go, but this might be completely unrelated.

If I got a dist, I think this would be the one.
http://www.performancedistributors.com/5.0ignition.htm
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Old 12-12-2009, 11:38 PM   #2
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I would just change the dizzy and go from there....and search around for dizzies theres alot out there that are the same but different name and price...or just way overpriced in general...
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Old 12-13-2009, 10:07 AM   #3
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Contrary to popular belief, a stock distributor w/work just as well, if not better than the expensive "After Market" ones IMO!! I have 5 Mustangs some w/After market & some w/stock NO DIFF other than looks. Not much can be seen anyway...
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Old 12-13-2009, 07:56 PM   #4
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Can you still get a new stock distributor? I don't want a cheaply rebuilt one.

Anyway, it looks like this thing is going to be down for a while. The rotational play when installed in the motor is due to a worn gear on the cam!!! I am pissed!
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Old 12-13-2009, 09:17 PM   #5
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Quote:
Originally Posted by Need-a-cage View Post
Can you still get a new stock distributor? I don't want a cheaply rebuilt one.

Anyway, it looks like this thing is going to be down for a while. The rotational play when installed in the motor is due to a worn gear on the cam!!! I am pissed!
You will be better off with this one >http://www.performancedistributors.com/18457.htm < It has a full length inpregnated bushing.

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Old 12-14-2009, 02:49 AM   #6
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the underside of the gear on the distributor is suppose to touch the ledge in the block...but it is also suppose to not have any pressure from the housing itself holding it down to the ledge or up away from the ledge/shoulder.


if your distributor is HIGH, then you can easily relocate the gear on the shaft.
in a FEW setups we have had to machine the shoulder of the distributor housing.... but there is only about .030" material there that can or should be removed only as a last resort.

it is much better to relocate the drive/curlpin or just buy a nother distributor.
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Old 12-14-2009, 10:11 AM   #7
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Quote:
Originally Posted by Kato Engineering View Post
the underside of the gear on the distributor is suppose to touch the ledge in the block...but it is also suppose to not have any pressure from the housing itself holding it down to the ledge or up away from the ledge/shoulder.


if your distributor is HIGH, then you can easily relocate the gear on the shaft.
in a FEW setups we have had to machine the shoulder of the distributor housing.... but there is only about .030" material there that can or should be removed only as a last resort.

it is much better to relocate the drive/curlpin or just buy a nother distributor.
Thanks for the info Kato. Could this cause the gear on the cam to get worn out if it has too much end play. It seems like whatever is holding it up inside the distributor has worn and allowed the shaft to drop down increasing the end play and the depth into the block. It only has 66k on it. The gear on the cam in the stock shortblock with 60k that this dist came out of looks great and the one in my new Dart block looks worn after only 6k!
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