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Old 08-16-2019, 08:10 PM   #1
ford35lh
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Default Tinker please elaborate on the cotter pin

Tinker: please elaborate on the factory purpose of the cotter pin in the pan.

Have snagged a few sleeves on them and gashed a finger once.
I always thought it was to help flow oil drops away from the pan.
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Old 08-16-2019, 08:15 PM   #2
DavidG
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Default Re: Tinker please elaborate on the cotter pin

Your thoughts are correct (along with keeping the hole from clogging).
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Old 08-17-2019, 11:30 AM   #3
Tinker
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Default Re: Tinker please elaborate on the cotter pin

You have it correct. The pin will rattle in the wind when driving, keeping the hole open for oil to be removed. That part of the pan is separate from the actual oil compartment. It is under the clutch and expels any oil that gets past the rear seal.
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Old 08-17-2019, 12:09 PM   #4
fordwife
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Default Re: Tinker please elaborate on the cotter pin

File off the sharp edges. Might save some blood and a shirt or two.
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Old 08-17-2019, 12:18 PM   #5
whizzernick
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Default Re: Tinker please elaborate on the cotter pin

no rear seal --- only slinger ---Im told that the only time oil gets in that area is when you shut down eng . that amount comes from rear slinger about 1 tea spoon.
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Old 08-17-2019, 08:02 PM   #6
Tinker
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Default Re: Tinker please elaborate on the cotter pin

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Originally Posted by whizzernick View Post
no rear seal --- only slinger ---Im told that the only time oil gets in that area is when you shut down eng . that amount comes from rear slinger about 1 tea spoon.

Great info too add. there is a seal on the pan. I don't know everything, never will, so it's great when people add info. Thanks.
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Old 08-18-2019, 01:14 AM   #7
flatheadmurre
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Default Re: Tinker please elaborate on the cotter pin

Shouldn´t come any oil through the slinger when you shut off the engine.
Climbing a real steep hill or engine blowby is what can have oil come out into the clutch area.
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Old 08-18-2019, 01:20 AM   #8
Tinker
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Default Re: Tinker please elaborate on the cotter pin

Mel i don't know. I know the pin is there to get rid of excess oil from wherever.


if someone says their original flathead doesn't leak a little oil. they are probably exaggerating.

Last edited by Tinker; 08-19-2019 at 06:37 PM.
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Old 08-21-2019, 01:42 PM   #9
whizzernick
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Default Re: Tinker please elaborate on the cotter pin

yes rear seal on pan -cork -- also seal on oil pan edge . this is what I have been told :
when you shut down engine the oil at the top of slinger --- some goes threw tube into oil pan and some goes into clutch area. PLEASE CORRECT ME IF I AM WRONG I have (4 ) 33-34 fords --- they all leak, always have. I now make a diaper that catches oil NO MORE MESS ON FLOOR (see ad in V-8 times)

I do know that 49-53 has no cotter pin in oil pan NO SLINGER but uses a rope rear main seal .
I am also told that they (49 -53 ) leak
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Old 08-21-2019, 02:03 PM   #10
tubman
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Default Re: Tinker please elaborate on the cotter pin

Quote:
Originally Posted by whizzernick View Post
yes rear seal on pan -cork -- also seal on oil pan edge . this is what I have been told :
when you shut down engine the oil at the top of slinger --- some goes threw tube into oil pan and some goes into clutch area. PLEASE CORRECT ME IF I AM WRONG I have (4 ) 33-34 fords --- they all leak, always have. I now make a diaper that catches oil NO MORE MESS ON FLOOR (see ad in V-8 times)

I do know that 49-53 has no cotter pin in oil pan NO SLINGER but uses a rope rear main seal .
I am also told that they (49 -53 ) leak
Not so, if they're done right. On the last two 8BA's I did, I used "Fel-Pro" pan gasket sets. They came with a selection of rope seals and a trimming guide. Using this guide, the seal was a little more "proud" than I would have thought. This and using the proper gasket sealer and not trimming the pan gaskets resulted in two non-leaking engines for me.

One last thing. On the last engine that I did, I experienced lower than normal oil pressure, which I traced back to the use of a Speedway Motors oil pump. I removed the pan and replaced the oil pump with a known good Ford pump and solved my oil pressure problem. Upon re-installing the pan (it had not been on the engine for more that a few weeks), I had a slight rear oil leak. I was real careful, but it seems that these gaskets and seals are not re-usable. I'm waiting for Rock Auto to have another close out on "obsolete parts" so I don't have to pay an arm and a leg for the pan gaskets. I'll probably end up "biting the bullet", though.
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Old 08-21-2019, 02:16 PM   #11
whizzernick
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Default Re: Tinker please elaborate on the cotter pin

YES you are right ( when done right they do not leak ) I was speaking about down the road.
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