Distributor?
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Junior User
Joined: Nov 2011
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Distributor?
Have a 1975 f100 with a 79 351 in it.
Thought we broke the timing chain and afyer disassembling the motOr find out the distributor drive gear is striped(shaft turns and the gear doesn't)
Need help re installing.
At the final point of stabbing the distributOr wich I've done a thousand times timing this truck but it won't sit all the way as if the oil pump shaft wasn't lined up. Any tips or tricks to gettyis running?
It's an everyday truck and we've been piddling with it since sunday.
Thanks
Thought we broke the timing chain and afyer disassembling the motOr find out the distributor drive gear is striped(shaft turns and the gear doesn't)
Need help re installing.
At the final point of stabbing the distributOr wich I've done a thousand times timing this truck but it won't sit all the way as if the oil pump shaft wasn't lined up. Any tips or tricks to gettyis running?
It's an everyday truck and we've been piddling with it since sunday.
Thanks
Fleet Mechanic
Joined: Apr 2012
Posts: 1,275
Likes: 134
Did you replace the gear, and are reusing your old dist, or did you pick up a different one. If you got a different one, make sure its not for a 289 302, as the oil pump shaft hole is smaller on the 302. Another thing to check is, make sure the oil pump drive shaft is in the oil pump hole, and not sitting on the pump housing causing it to slant.
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Junior User
Joined: Nov 2011
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No we got a whole new distributor and it's the right one
I'll try turning the motor over. I didn't think of that I been trying the hard way lol
Hopefully I can get some time today or tomorrOw if I don't have to work
I'll try turning the motor over. I didn't think of that I been trying the hard way lol
Hopefully I can get some time today or tomorrOw if I don't have to work
Posting Guru
Joined: Mar 2010
Posts: 1,196
Likes: 2
No way I'd try bumping the engine over, chances are, you'll no longer be at TDC once you get the dizzy to seat. I always grab the appropriate socket (5/16" maybe) duct tape it to a few extensions, and make small changes that way until the dizzy drops in.
Fleet Mechanic
Joined: Jan 2012
Posts: 1,668
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From: Saskatchewan
The distributor and camshaft gears mesh together long before the oil pump driveshaft fits into the distributor so as long as you have the dizzy in the right tooth you can turn the engine over intell the dizzy drops in maintaining the timing(or at least close enough to start) it should start and once it's running you can set the timing. I've done this many times. Your way also works fine to. Just thought I should clear that up.
Posting Guru
Joined: Mar 2010
Posts: 1,196
Likes: 2
^^^Oh...so you're saying keep the dizzy in the hole and let it drop, rather than trial and error. I'll buy that.
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Fleet Mechanic
Joined: Jan 2012
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From: Saskatchewan
You bet, just keeping light pressure on the housing.
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Freshman User
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You guys know a good part number for an adjustable vacuum advance, for a 1977 351M?
And where to buy it?
Are they worth fooling with?
My present advance is loose and floppy. I think it should be tight on the dizzy
and the arm only move in an out.
Thought the adjustable might improve over all timming. Thanks/Robert
And where to buy it?
Are they worth fooling with?
My present advance is loose and floppy. I think it should be tight on the dizzy
and the arm only move in an out.
Thought the adjustable might improve over all timming. Thanks/Robert
Cargo Master
Joined: Apr 2009
Posts: 3,038
Likes: 4
From: South west Idaho
I bump mine in all the time,like about 50 years. I put it in park or out of gear depending on the trany. Them with a my hand on top of the dist. i jump it at the solenoid with an old push button made for the older ford starters. Just a quick bump,not crank it much,you can feel it drop. Then i bring number one up again to make sure it's pointing correct so i can start timing it.
Posting Guru
Joined: Sep 2003
Posts: 2,313
Likes: 12
From: Northeast LA
I've done what's suggested here, but I've also taken a small wooden dowel with a glob of vaseline on it and stuck that down the distributor hole and smeared the vaseline all around the top of the oil pump driveshaft so that it will be in the center of the hole and not leaning sideways. Hopefully that makes some sense. Good luck.
Cargo Master
Joined: Apr 2009
Posts: 3,038
Likes: 4
From: South west Idaho
I had that problem with a 302 a couple of months ago. Turned out it was a rebuilt dist i bought and it was out of round in that area. I removed the O-ring long enough to use a little sand paper on it. Then i used a brake cylinder hone in the engine just enough to shine it up. Dropped right in then. I knew if i forced it in i may never get it out later. I don't know if it will help later ,but i did put some no-sieze around it before dropping it in.