cannot remove distributor







That site and every other site I went to for this problem all had similar comments from 98% of the respondents. Hammer, pry bar, wiggle it, twist it, engine hoist, winch, dynamite. And there were the 2% ers. Pull the engine and do a complete tear down and be careful and don't scratch anything.
You know, if the pin is sticking out, and if it happens to be in line with the gear tooth, it likely should spiral right on out as you lift the distributor.





1. The housing can be freely rotated when the dist is jammed.
2. The dist stops abruptly with a thud when pulled upward.
3. If let go when raised it drops back down.
#1 eliminates the brilliant theory of sludge or silicone RTV.
This all points to what I said in post # 132 as being the solution without risking breaking anything inside.
If the pin is out far enough, the only way to remove the mainshaft is with the housing removed first.
But, nobody reads previous posts before jumping in. It's very hard to believe that my suggestion in #132 was only mentioned once in 16 later posts.
There are a lot of brain dead hayseeds on this Forum.
Not even "LARS, THE GREAT" came up with my solution.
In case any of you geniuses haven/t though ahead far enough: If the OP uses a slide hammer to shear that roll pin, not only does he risk breaking something, but he will then have to open the bottom to fish out the sheared off section of roll pin.
I was going to mock this up with a pin extending from a distributor, but the only camshaft I have laying around is a Pontiac, so that won't work for mockup.
If the distributor will not come out by rotating the engine over by hand, forget about trying to pry it out. The only thing that's going to happen is that something is going to break, and you'll end up having to tear the engine down. Do as suggested in post 132: Remove the "football" from the top of the distributor shaft - you can do this with a high speed sanding disc. Once removed, you can pull the points cam off the shaft and the entire distributor housing will slide up and off the mainshaft (after you remove the crossgear out of the housing). This will leave only the shaft in the block, which is now unsupported by the housing, allowing it to be tilted and moved around enough to disengage from the cam gear, regardless of roll pin extension.
You're going to have the distributor rebuilt anyway, so the additional $90 for a new mainshaft is a lot cheaper than tearing the engine down and repairing the damage caused if you force it out.
In spite of agreeing with the evaluation and options above, I'm not sure where that smart remark came from. I think Daren should try all viable options for removal without cutting things apart or forcing things to break. If the roll pin is extended and hitting the cam, it should be possible to rotate the engine/distributor gear so that the roll pin is extending 180 degrees away from the cam gear, thus allowing it to be removed without cutting anything. Cutting parts should be a last option, and if it's not the pin that's preventing removal, cutting the football off the shaft still may not solve the problem.
Lars
Last edited by lars; Feb 3, 2017 at 03:31 PM.





One item to check in order to determine a path forward:
I think you need to positively determine if the obstruction is blocking the mainshaft/gear, or if it's blocking the distributor housing itself.
If the obstruction is holding the shaft/gear (as a displaced roll pin would), you should be able to pull up on the housing until it stops. At that point, there should be no endplay (vertical play) in the shaft, since it will by held down tightly against the housing upper bushing by the obstruction (assumed to be the pin). To validate that, grab the distributor by the mainshaft "football"/centrifugal advance plate and hold it up against the stop, letting go of the housing itself. The housing should drop down slightly (maybe .050") by the amount of mainshaft endplay, and the housing should have just a little bit of vertical movement possible with the mainshaft held firmly up. The housing should rotate freely.
The other possibility, of course, is that you pull the housing all the way up against the obstruction stop. With the housing held firmly up, see if there is any vertical endplay movement in the mainshaft. If the mainshaft can be wiggled up and down a little by the amount of normal shaft endplay, it means that the obstruction is not holding the shaft or gear - it's holding the distributor body. If that's the case, it won't do any good to cut the "football" off the mainshaft, since there is some obstruction in the engine block that's hitting the ridges on the distributor housing and holding the housing itself. In this case, holding the distributor hard "up" by the mainshaft, the distributor body will not rotate freely, but will have roughness in its rotation.
Lars
I was going to mock this up with a pin extending from a distributor, but the only camshaft I have laying around is a Pontiac, so that won't work for mockup.
If the distributor will not come out by rotating the engine over by hand, forget about trying to pry it out. The only thing that's going to happen is that something is going to break, and you'll end up having to tear the engine down. Do as suggested in post 132: Remove the "football" from the top of the distributor shaft - you can do this with a high speed sanding disc. Once removed, you can pull the points cam off the shaft and the entire distributor housing will slide up and off the mainshaft (after you remove the crossgear out of the housing). This will leave only the shaft in the block, which is now unsupported by the housing, allowing it to be tilted and moved around enough to disengage from the cam gear, regardless of roll pin extension.
You're going to have the distributor rebuilt anyway, so the additional $90 for a new mainshaft is a lot cheaper than tearing the engine down and repairing the damage caused if you force it out.
In spite of agreeing with the evaluation and options above, I'm not sure where that smart remark came from. I think Daren should try all viable options for removal without cutting things apart or forcing things to break. If the roll pin is extended and hitting the cam, it should be possible to rotate the engine/distributor gear so that the roll pin is extending 180 degrees away from the cam gear, thus allowing it to be removed without cutting anything. Cutting parts should be a last option, and if it's not the pin that's preventing removal, cutting the football off the shaft still may not solve the problem.
Lars
, I was simply reflecting the awe that you inspire within a percentage of the forum participants. I apologize to you personally if you took offense. No offense intended. I'm sure that you do great work and you have a large following here on this forum. The Great FTF is one of your biggest fans, and probably, rightly so. You took displeasure with what I wrote after a very long time, and that's a shame because it caused you to qualify your remarks to the point of inconclusiveness. So, like our president, your emotions often supersede your intellect. All options have indeed been exhausted by the OP. He's been at this for a very long time.The questions that you ask in #163 have already been asked and answered. The OP is now MIA so we'll see how it pans out if and when he reports back.
If I didn't know how to set up a distributor properly, as I have done many times before, and in many different configurations, then you would be my first choice "go-to-guy" because you seem to be a practical alternative to the common misconception which is: "If The General Did It And Designed It Sixty Years Ago Then It Must Be Right". You think outside of the box and seem to tailor make your distributor builds to each individual application.
That's not the whole answer, as you know, because, each engine being different, requires tweaking which can only be accomplished using the recipient engine build.
I'm glad that you brought forward your knowledge of the disassembly process and how each part relates to the next, so as to validate that a top-down disassembly is needed in this case.
Next time I'm in Colorado, I'll stop by with a case of your favorite beer and shoot the bull with you. Whether you'll welcome me or not.
Reg,
Joe
Last edited by 65tripleblack; Feb 3, 2017 at 08:14 PM.
Most of us have left for good a forum in the past that catered to those throwing insults around. This forum has always been in good standing because there is almost none of that. A darn good reason so many check in almost daily and enjoy the visit.
(Personally I would have had a 2 foot crowbar on that distributor as a motivator 5 minutes into this job. I would not have added enough pressure to break the housing but I would not be afraid to add a good amount of pressure to see if it comes out.
If a roll pin snaps I would chase it with a magnet and hope for the best.)
The Best of Corvette for Corvette Enthusiasts





I humbly stand corrected, no disrespect to Lars intended, and now that I know, if Colorado was not so durn far I too would show up with some adult beverages and discuss the intricacies of Corvettes with him!

(Go ahead and have a laugh on me, I DO feel foolish for having made that mistake.
I think what threw me off was seeing LARS rather than Lars.)
Its very satisfying when unusual mechanical problems are figured out and a solution emerges.
Lets hope the OP wasnt turned off by the negative turn part of this thread took and comes back with some pictures and answers.





I blame it on being from NJ.

Doug






To quote Don Rickles...
Last edited by Viet Nam Vett; Feb 4, 2017 at 01:39 PM.
I humbly stand corrected, no disrespect to Lars intended, and now that I know, if Colorado was not so durn far I too would show up with some adult beverages and discuss the intricacies of Corvettes with him!

(Go ahead and have a laugh on me, I DO feel foolish for having made that mistake.
I think what threw me off was seeing LARS rather than Lars.)

Gary






Last edited by Daren67; Feb 4, 2017 at 02:58 PM.
Jeff










