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01-21-2019, 08:26 PM | #1 |
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Join Date: Jun 2014
Location: Melbourne, Australia
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Distributor Drive
Guys, I seek some info to confirm or otherwise what I have found. I took apart a going motor for inspection and decided to put it back together and run till it dies sometime later. I have no hope of getting it going again because the top of the oil pump/distributor drive gear shaft has a slot in it. Everything I see says it should be a tongue. The lower drive shaft I have has a slot each end, which I believe is correct. So, I have a slot trying to drive a slot - no go.
On Page 1-53, Les Andrews shows the lower shaft with a tongue on it. The diagram is repeated on page 1-105. Mr Andrews seems to contradict himself in instruction 18 on page 1-53 when he says "Insert the distributor shaft into the head, aligning the bottom slot of the shaft with the tab on the cam gear shaft." As it stands, it seems I have the only cam gear shaft with a slot at the top and this motor was running. What's going on? Looks like I might have to buy a new cam gear shaft with a tongue at the top.
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01-21-2019, 09:17 PM | #2 |
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Re: Distributor Drive
It could have been "fixed", perhaps the distributor seized and sheared off the tang, so cut a slot to match in the gear and make a piece of metal to fit both slots as a fix
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01-21-2019, 09:22 PM | #3 |
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Re: Distributor Drive
I considered that but without a sleeve over the tongue/slot drive, the shafts would not stay centered and the hole in the head gasket is not big enough to allow a sleeve to pass through.
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01-21-2019, 09:30 PM | #4 |
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Location: Cape Cod MA
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Re: Distributor Drive
The oil pump and distributor gear is Ford part number A-6551. Look it up in your favorite dealers catalog and you will see it has a tongue.
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01-21-2019, 10:43 PM | #5 | |
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Re: Distributor Drive
Quote:
In fact, as I re read this, I've talked myself into it.
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01-22-2019, 03:31 AM | #6 |
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Re: Distributor Drive
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01-22-2019, 09:51 AM | #7 |
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Join Date: Jul 2010
Location: upstate NY near Mass border
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Re: Distributor Drive
My friend had an original (sic) untouched CCPU that he brought to me to see why it was not running right. I found that the dissy shaft had a 1/2 " copper water pipe connector shoved over the Dissy shaft to hold both parts together. Some slippage expected. You never know what you will find in an A to make it run a few more years. Jack '
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01-22-2019, 11:27 AM | #8 |
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Location: Alabama
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Re: Distributor Drive
No harm meant but the distributor drive gear is usually worn to the point of causing excessive back lash in the distributor . I mostly replace the drive gear whether I'm doing a rebuild of the engine or not . Besides the standard size , two oversize distributor drive gears and parts are offered for engines with more wear at the cam connection . Replacing the gear would probably be the easiest and best fix .
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01-22-2019, 03:46 PM | #9 |
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Location: Melbourne, Australia
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Re: Distributor Drive
I got the motor running last night after modifying the drive shaft. This engine has been "freshened up" and I don't know how long it has before it needs a rebuild. I'll replace the cam gear and shaft then.
FWIW, the motor was in a car I bought a few years ago from the US. The work was done over there and it has 0.006" wear in the bores, though they are parrallel and the pistons have been stretched to take up the slap. New rings and a valve grind, and it runs OK for now. Bearings were quite OK. The clearances were adjusted by removing shims - about 0.005" on each main bearing. Its future is to run as long as it continues to do so, then a rebuild with counterweights, new cam and a couple of other things (including a cam gear!).
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