351m distributor/oil pump
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Junior User
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From: North Dakota.
351m distributor/oil pump
So, I was laid up for a few weeks and had a mechanic take a look at my 1983 F350 with a 351m. It would not run highway speeds for nothing.
In the process of pulling the distributor, they broke parts of it off. mainly the little gear at the bottom. I have heard stories about how it can be difficult to get the distributor out, but really....
When they got the new gear on, they put it back in started it up and took out the oil pump.
If I drop the pan, and replace the oil pump, make sure that all of the pieces are out of it, and then replace the distributor if it needs it, what are the odds that it will run? I would also replace the oil, and filter.
Any one run into this problem?
My thought is that the pieces should have been to big to make it through the oil filter, which was new.
In the process of pulling the distributor, they broke parts of it off. mainly the little gear at the bottom. I have heard stories about how it can be difficult to get the distributor out, but really....
When they got the new gear on, they put it back in started it up and took out the oil pump.
If I drop the pan, and replace the oil pump, make sure that all of the pieces are out of it, and then replace the distributor if it needs it, what are the odds that it will run? I would also replace the oil, and filter.
Any one run into this problem?
My thought is that the pieces should have been to big to make it through the oil filter, which was new.
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From: Virginia
If they ran it till the motor locked up, your chances are slim, though sometimes they break loose, but they will knock when they run.
If it didn't run at all, then your chances are good. I would carefully inspect the gear on the camshaft. If they tore it up, then you will have to replace the camshaft. More than likely you will also need a new pump driveshaft, that's probably what fell out when they pulled the distributor. It has a keeper to hold it into the pump, but if the driveshaft gets stuck in the bottom of the dist, then the keeper slides down on the shaft, and comes out of the pump.
If it didn't run at all, then your chances are good. I would carefully inspect the gear on the camshaft. If they tore it up, then you will have to replace the camshaft. More than likely you will also need a new pump driveshaft, that's probably what fell out when they pulled the distributor. It has a keeper to hold it into the pump, but if the driveshaft gets stuck in the bottom of the dist, then the keeper slides down on the shaft, and comes out of the pump.
FTE Legend
Joined: Jul 2010
Posts: 32,875
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From: Northeast, OK
If you have to replace the cam do not go back stock. I don't know all the differences in my two 351M's, but one is the cam and that engine is a tiger compared to the other one.
And, piggybacking on Dave's idea, did they really take out the oil pump or just lose the oil pump's drive shaft and not know it?
And, piggybacking on Dave's idea, did they really take out the oil pump or just lose the oil pump's drive shaft and not know it?
Thread Starter
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Junior User
Joined: Nov 2011
Posts: 92
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From: North Dakota.
If you have to replace the cam do not go back stock. I don't know all the differences in my two 351M's, but one is the cam and that engine is a tiger compared to the other one.
And, piggybacking on Dave's idea, did they really take out the oil pump or just lose the oil pump's drive shaft and not know it?
And, piggybacking on Dave's idea, did they really take out the oil pump or just lose the oil pump's drive shaft and not know it?
I don't honestly know. I will drop the pan and find out. worst case I am out some time and maybe the cost of an oil pump. I have the distributor already from another motor.
my guess would be that they lost the oil pump drive shaft.
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Junior User
Joined: Nov 2011
Posts: 92
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From: North Dakota.
If you have to replace the cam do not go back stock. I don't know all the differences in my two 351M's, but one is the cam and that engine is a tiger compared to the other one.
And, piggybacking on Dave's idea, did they really take out the oil pump or just lose the oil pump's drive shaft and not know it?
And, piggybacking on Dave's idea, did they really take out the oil pump or just lose the oil pump's drive shaft and not know it?
If I do replace the cam, recommendations?
FTE Legend
Joined: Jul 2010
Posts: 32,875
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From: Northeast, OK
If they just dropped the oil pump's shaft you can replace that w/o dropping the pan. No, not forever, but long enough to see what oil pressure you get. Might tell you if you are going to have to rebuild it.
As for cam, I haven't figured out what I have. I took several readings off of it and did a little bit of searching but didn't quickly see what it was so stopped. So, if you have to replace the cam let me know and I'll get serious trying to figure it out. I know it'll pull quite well from idle right on up and yet I've gotten 16 MPG running a true 62 on the highway - with the ZF in OD of course.
As for cam, I haven't figured out what I have. I took several readings off of it and did a little bit of searching but didn't quickly see what it was so stopped. So, if you have to replace the cam let me know and I'll get serious trying to figure it out. I know it'll pull quite well from idle right on up and yet I've gotten 16 MPG running a true 62 on the highway - with the ZF in OD of course.
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Joined: Jan 2001
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From: Virginia
The first thing I would do is see if the engine turns by hand. If it does, then all you can do is put it back together and get it running, and see how much oil pressure you have, and how many noises you have. Low oil pressure and lots of knocking sounds won't be good. If this happens, I would do a serious look around for a 400 before I rebuilt the 351m. I would sink money in the 400 before the 351m.
I am assuming you also know how to get the dist back in time from scratch? That's another favor they did for you. You haven't a clue where it goes back in, so you will have to start over and get the engine in the correct position, and drop the dist in so it's right.
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Post Fiend
Joined: Nov 2005
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From: Charles Town, W bygod Va
I can't think of any way to break the gear while pulling the distributor, or ruining the oil pump putting it back in.
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Joined: Nov 2012
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From: ok
the roll pin broke. its probably in the pan as well. i still havent gotten my distributor loose. soaking in oil. the original owner thought it sounded cool loping at idle, but it only starts if you give it a couple pumps. ra------room ra--------room vroom
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