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Discussion Starter #1
Hello everyone, I am currently having no luck getting my distributor to drop past the cam shaft gear. I've tried turning the motor over to get it to drop but it doesn't seem to want to cooperate. I"m running a brand new msd pro-billet distributor with a msd bronze gear (this is the first time i've ever tried installing a dist. with a bronze gear). I don't know if there is any "trick" or not in getting the dist to drop due to having a bronze gear, or if installing a dist. with a bronze gear is inhearently more difficult or not? Any suggestions, advise, experiences, or help will be greatly appreciated at this point! Thanks in advance.
 

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Hello everyone, I am currently having no luck getting my distributor to drop past the cam shaft gear. I've tried turning the motor over to get it to drop but it doesn't seem to want to cooperate. I"m running a brand new msd pro-billet distributor with a msd bronze gear (this is the first time i've ever tried installing a dist. with a bronze gear). I don't know if there is any "trick" or not in getting the dist to drop due to having a bronze gear, or if installing a dist. with a bronze gear is inhearently more difficult or not? Any suggestions, advise, experiences, or help will be greatly appreciated at this point! Thanks in advance.
Is the oil pump driveshaft keeping you from dropping in? You probably already know, but you have to clock that drive shaft at the correct orientation to get the distributor to engage fully and drop all the way down. Ive had those damn shafts lean to one side or another, and the distributor was a absolute pain to put in. Its gotta be fairly centered in the hole, and clocked to the right orientation
 

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Discussion Starter #3
thanks for the suggestion, yes I rotated the oil pump drive shaft many times thinking that that was the problem, but I'm thinking that i am not even getting to the oil pump drive shaft because after everytime i pull the dist. back out, the oil pump drive shaft doesn't look like it's been moved or touched for that matter, and guessing my dist is still sitting at least an inch to a inch and a half from seating is making me think that some how it's not fully engaging or getting past the cam shaft gear?
 

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Discussion Starter #4
but supposing that the shaft is leaning to one side, how would i correct that without pulling to motor and pan?
 

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Hello everyone, I am currently having no luck getting my distributor to drop past the cam shaft gear. I've tried turning the motor over to get it to drop but it doesn't seem to want to cooperate. I"m running a brand new msd pro-billet distributor with a msd bronze gear (this is the first time i've ever tried installing a dist. with a bronze gear). I don't know if there is any "trick" or not in getting the dist to drop due to having a bronze gear, or if installing a dist. with a bronze gear is inhearently more difficult or not? Any suggestions, advise, experiences, or help will be greatly appreciated at this point! Thanks in advance.
What motor do you have? Some of the Ford motors I had to rock the crank to get every thing lined up then re-check the set up when it fell in.
 

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Discussion Starter #7
the motor is a 540 bbc, and i definetly would look down the hole before pulling it. Is it possible, if need be, is it possible to pull the oil pump drive shaft out of the distributor hole and reset it or?
 

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the motor is a 540 bbc, and i definetly would look down the hole before pulling it. Is it possible, if need be, is it possible to pull the oil pump drive shaft out of the distributor hole and reset it or?
Try putting the dist. in with out the shaft if you can and see if the dist. will drop in to the cam. Shouldn't be a prob to at least make sure that the gears will mesh.
 

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Discussion Starter #9
I can do that, but again is it possible to easily pull the oil pump driveshaft out of the dist. hole? If so how would i go about it? and what about putting the oil pump drive shaft back in, is that possible also through the dist. hole?
 

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I can do that, but again is it possible to easily pull the oil pump driveshaft out of the dist. hole? If so how would i go about it? and what about putting the oil pump drive shaft back in, is that possible also through the dist. hole?
My main thing was FE block Fords and we had a snap washer that went on the pump shaft to keep it in the pump. The last Chevys I worked on were small blocks and they had a sloted oil pump drive on them and that was about 35 years ago.
 

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Gm to aftermarket

Look at the bottom of the dist shaft. Then look at the stocker. The stockers have an "easy entrance" in the ID of the shaft, some aftermarkets do not.... I have never heard of, or had any issues with the gear engagement, but it is possible the cam gear location is off due to lateral movement of the camshaft... Try the stocker again....and/or, do some comparisons of the two... The oil shaft will prevent the last 1/4 to 1/2 inch of "drop", not much more....AND rotating the engine slowly by hand always works.......

Ray
 

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Noooooooooooo.....

I can do that, but again is it possible to easily pull the oil pump driveshaft out of the dist. hole? If so how would i go about it? and what about putting the oil pump drive shaft back in, is that possible also through the dist. hole?
DO NOT PULL THE SHAFT OUT THE TOP..... First, if it has a plastic sleeve, you will pull the shaft out of the sleeve, and the sleeve will be lost in the engine... If the shaft has a steel collar/sleeve, it is pinned on, and won't allow you to pull the shaft out the top.. What gen is the engine?......

Ray
 

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Look at the bottom of the dist shaft. Then look at the stocker. The stockers have an "easy entrance" in the ID of the shaft, some aftermarkets do not.... I have never heard of, or had any issues with the gear engagement, but it is possible the cam gear location is off due to lateral movement of the camshaft... Try the stocker again....and/or, do some comparisons of the two... The oil shaft will prevent the last 1/4 to 1/2 inch of "drop", not much more....AND rotating the engine slowly by hand always works.......

Ray
I know on my Fords I always was in the cam with the dist. gear before I cought the oil drive shaft and that was about 1/2" drop on the shaft.
 

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Discussion Starter #14
it should be a gen IV, it's a merlin block and i'm running a melling 10778C oil pump with the hardened oil pump shaft.
 

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Hello everyone, I am currently having no luck getting my distributor to drop past the cam shaft gear. I've tried turning the motor over to get it to drop but it doesn't seem to want to cooperate. I"m running a brand new msd pro-billet distributor with a msd bronze gear (this is the first time i've ever tried installing a dist. with a bronze gear). I don't know if there is any "trick" or not in getting the dist to drop due to having a bronze gear, or if installing a dist. with a bronze gear is inhearently more difficult or not? Any suggestions, advise, experiences, or help will be greatly appreciated at this point! Thanks in advance.
I have seen MSD distributors too tight to fit in certain block and manifold combinations, and have even seen a couple of different "big name" engine builders take a brand new MSD billet distributor to a belt sander. Not saying it's right, but I have seen it. If you are 1 1/2" shy of dropping all the way, check to see what's going on, it's not the oil pump drive.

Also, are you running a roller cam that requires the bronze gear? If not, I would normally put an iron gear on the distributor, since the bronze gears do wear.
 

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it should be a gen IV, it's a merlin block and i'm running a melling 10778C oil pump with the hardened oil pump shaft.
There are alot more people that know the Chevy engines out here than I know about them, been to many years, but the dist. gear should be in the cam before it hits the oil pump shaft.
 

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Discussion Starter #17
yeah i need the bronze gear as i have a solid roller cam, and I agree i don't think it's even making it to the oil pump driveshaft. My suspecion is that the bronze gear is not fully engaging or passing through the camshaft gear, thus not allowing the dist. to drop to the oil pump drive shaft, that's my impression at least. Any other suggestions?
 

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Ah......Merlin, MSD, and ????

I have seen MSD distributors too tight to fit in certain block and manifold combinations, and have even seen a couple of different "big name" engine builders take a brand new MSD billet distributor to a belt sander. Not saying it's right, but I have seen it. If you are 1 1/2" shy of dropping all the way, check to see what's going on, it's not the oil pump drive.

Also, are you running a roller cam that requires the bronze gear? If not, I would normally put an iron gear on the distributor, since the bronze gears do wear.
May be it right there. If the intake is off a little, and the dist OD is off a little....Is the intake centered?? ........ You are dealing with several different aftermarket parts, time to do a little "post production" inspection....


Ray
 

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May be it right there. If the intake is off a little, and the dist OD is off a little....Is the intake centered?? ........ You are dealing with several different aftermarket parts, time to do a little "post production" inspection....


Ray
Can the gear be taken off the dist. and be put in to see if it will bottom out to make sure the top is lining up?
 

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Discussion Starter #20
first of all how do you check if the intake is "centered"? Not trying to be smart but i haven't ever heard of that. I'm assuming that it is or close to be as it had the previous distributor fully seated in it and ran with no probs.
 
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