Pan leak, Generator or distributor or ? - The Jockey Journal Board

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Old 01-27-2020, 06:25 PM   #1
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Default Pan leak, Generator or distributor or ?

63 pan. Fresh build. Sprung a leak at what I thought was distributor, like the o-ring wasnt sealing. Engine builder believes it to be the idler gear bolt that has a thru hole to generator mount flange.


So I pull the genny, clean it up at idler bolt, spot of silicone. While I was looking, I noticed this hole.

Its the small hole between gen and cylinder stud.




Dumb question first...what is the hole for ?
Super smart question...can it be sealed ?
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Old 01-27-2020, 07:55 PM   #2
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Default Re: Pan leak, Generator or distributor or ?

Ain't that for like... the timer hold-down bolt? Pretty sure your OEM one used two bolts.
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Old 01-27-2020, 08:09 PM   #3
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Default Re: Pan leak, Generator or distributor or ?

Yes 2 bolts.
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Old 01-27-2020, 08:11 PM   #4
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Default Re: Pan leak, Generator or distributor or ?

Parts book confirms. 66 -69 has 1 bolt and holder.
Up to 65 has 2 holes.


Blind hole or thru-hole ? Need to be sealed or not ?
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Old 01-27-2020, 09:13 PM   #5
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Default Re: Pan leak, Generator or distributor or ?

If threaded put a screw in it with a dab of sealant under the head.
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Old 01-27-2020, 09:39 PM   #6
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Default Re: Pan leak, Generator or distributor or ?

not often does that inside hole an open thread into the can cover - someone made that happen if it is

the new engine rings might not have seated yet dont know what was done and how But internal combustion pressures can cause lots of seepage that normally does not happen

a film is floating around the base gasket as well
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Old 01-28-2020, 05:00 PM   #7
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Default Re: Pan leak, Generator or distributor or ?

Pushed a wire into hole and it stops about 5/8" down.


Is it possible to have the cam chest leak into generator ? Does the thru bolts for genny need to be sealed ? What about the end with armature vs. the can with windings ? Should that be sealed ?
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Old 01-28-2020, 06:32 PM   #8
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Default Re: Pan leak, Generator or distributor or ?

a seal behind the gear and slinger can and does harden from the heat of the exhaust and it will oil up the generator real good actually

remove the gen and completely disassemble it the seal is on the engine side in the attachment cover check the 2 bearings while your doing it as they are not expensive and your in it - 1000 paper the armature and a new set of brushes wont hurt all cheap stuff
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Old 01-28-2020, 10:04 PM   #9
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Default Re: Pan leak, Generator or distributor or ?

And at risk of sounding like a moron, you do have a gasket between yer genny and the case, right?
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Old 01-29-2020, 04:45 PM   #10
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Default Re: Pan leak, Generator or distributor or ?

you can see if your in a shop all the time working on these type engines that the gasket black color leaves behind a slight dis color, over time it become more visible but that is a new assembly
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Old 01-30-2020, 08:08 AM   #11
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Default Re: Pan leak, Generator or distributor or ?

Gov..yes, gasket !


JZ, after going thru the the seals/bearings/brushes would the gen need to be polarized afterwards or not ?
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Old 01-30-2020, 09:22 AM   #12
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Default Re: Pan leak, Generator or distributor or ?

Any time wires are off gen, polarize it. Now fact is many times it won't need to be. Still it's easy and no big deal, so just do.
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Old 01-30-2020, 08:48 PM   #13
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Default Re: Pan leak, Generator or distributor or ?

easy to do just once installed the gen - and the battery connected no wires on generator take a wire from the plus side of the battery and momentary flash the field term - its the one that is closest to the front jug < installed correctly the generator that is

your done connect the gen wires
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