Can't install distributor - oil pump shaft not seated
#1
Can't install distributor - oil pump shaft not seated
I can't install the distributor in my '78 Ford (351M). It seems like the oil pump shaft is not seated in the oil pump. What's the best way to make sure the shaft is seated in the oil pump? I think that it may have lifted up just enough when I pulled the old distributor. I'm thinking of getting a oil pump primer shaft and trying that. I've had the normal aggravating trouble of getting distributors to fully seat/engage, but nothing like this. I've worked on and off on this for over a week, and I'm no closer to getting it now. Thank you.
#5
Another possibility is shaft is in oil pump all the way but not in dizzy all the way. Has to be lined up just right for dizzy to drop down on it all the way. Kinda a pain sometimes when your tryin to get the rotor to land in the right position at the same time.
I've had this problem many times, sometimes they drop right in other times they fight awhile, lol.
I've had this problem many times, sometimes they drop right in other times they fight awhile, lol.
#6
As posted in another thread when this had me whipped:
I'm not proud - it whipped me, but Dad discovered that the oil pump shaft had come out of the pump. He used a socket (can't remember the size) and 1/4"-drive long extension and got it seated. The distributor then slipped in like always. We timed it, then guestimated the timing setting by idle - ~600 rpm, checked it, and it was dead on - 12 degrees advanced. Glad to have it going, and learned from it.
I'm not proud - it whipped me, but Dad discovered that the oil pump shaft had come out of the pump. He used a socket (can't remember the size) and 1/4"-drive long extension and got it seated. The distributor then slipped in like always. We timed it, then guestimated the timing setting by idle - ~600 rpm, checked it, and it was dead on - 12 degrees advanced. Glad to have it going, and learned from it.
#7
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Bruce
I have had the same problem installing my distributer. I ended up using a spring loaded claw that has 4 thin metal jaws that extend out from a cable when a part on the end is depressed.y issue wasn't the distributer but the shaft seating into the oil pump. I used the claw to grasp the hex Allen shaft and manipulate the shaft up and down and circular rotation. When the shaft seated down into the pump my problem was solved. What a bugger.
#11
Got my truck by compiling a total of 4 trucks. That's a story for another day. Anyway, first start up, the dist went all the way down, but I had no oil pressure. Pulled dist, pretty sure the oil pump drive didn't seat in the pump. Got it to sit in the pump like it's suppose to, reinstalled the dist, it wouldn't seat all the way down. I pulled the distributor and oil pump drive. reinstalled the dist and it seated fully. pulled the dist, installed and seated the oil pump drive shaft, reinstalled the dist, wouldn't seat. I pulled the dist and oil pump drive, compared the drive to another known 351M shaft, found the same length. The fun continues......
#12
Got my truck by compiling a total of 4 trucks. That's a story for another day. Anyway, first start up, the dist went all the way down, but I had no oil pressure. Pulled dist, pretty sure the oil pump drive didn't seat in the pump. Got it to sit in the pump like it's suppose to, reinstalled the dist, it wouldn't seat all the way down. I pulled the distributor and oil pump drive. reinstalled the dist and it seated fully. pulled the dist, installed and seated the oil pump drive shaft, reinstalled the dist, wouldn't seat. I pulled the dist and oil pump drive, compared the drive to another known 351M shaft, found the same length. The fun continues......
1970/74 351C; 1971/82 400; 1975/82 351M
#13
I've also encountered difficulty in reinstalling the distributor and getting it to engage the intermediate shaft. What I did was to use a 1-4" drive socket (5/16") and extension to engage the shaft. Rotated the shaft just a bit, and the distributor went right in!
Years back, on my first 460, the shaft didn't line up with the distributor, and I managed to push the shaft aside as I installed the distributor. Then tried to figure out why I had no oil pressure...
Anyway, duct tape the socket to the extension, and be careful not to drop anything (especially the shaft) into the pan.
As Bill said, the shaft should have a retaining ring at the top so you can't pull it out of the pump. My replacement Melling shaft also had the ring
Years back, on my first 460, the shaft didn't line up with the distributor, and I managed to push the shaft aside as I installed the distributor. Then tried to figure out why I had no oil pressure...
Anyway, duct tape the socket to the extension, and be careful not to drop anything (especially the shaft) into the pan.
As Bill said, the shaft should have a retaining ring at the top so you can't pull it out of the pump. My replacement Melling shaft also had the ring
#14
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