Pan Leaks

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The Riot
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Pan Leaks

Postby The Riot » Sun Feb 12, 2017 7:56 pm

Hi All,
Does anybody have any creative ideas on correcting Cub Oil Pan gasket leaks. I installed a brand new cork gasket with Permatex Sealant and it is leaking. I tried tightening some bolts but that doesn't seem to help, it looks like the pan has some warping.
I'm definitely going to try to straighten the pan flange as much as possible, but I'm also thinking of trying to make a new gasket out of rubber if I can find some stock.
Any thoughts ideas ???

Thanks,
The Riot

Eugene
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Re: Pan Leaks

Postby Eugene » Sun Feb 12, 2017 8:08 pm

Straighten out the pan lip, then use RTV instead of a cork gasket.

Edit: Color of RTV was deleted.
Last edited by Eugene on Sun Feb 12, 2017 8:16 pm, edited 1 time in total.
I have an excuse. CRS.

staninlowerAL
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Re: Pan Leaks

Postby staninlowerAL » Sun Feb 12, 2017 8:11 pm

Someone posted that the later style pan construction included a reinforcing flatbar for the flange to prevent the bolts from "bowing" up when overtightened. If yours does not have this feature, you might could find one or retrofit yours to provide this same extra thickness. Just use slightly longer bolts to make up the difference.

Stevetractor
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Re: Pan Leaks

Postby Stevetractor » Sun Feb 12, 2017 8:46 pm

Are you sure it's the pan? A small leak from the rear main oil seal will find its way around the bottom of the block and sure make it look like the pan gasket. Had one that was always wet even after a complete rebuild. Finally got mad split tractor and had seal holder machined out and sleeved for a new seal, all is well now. Not only was hole too large for the replacement seal it was out of round and warped. I always use gaskets from TM coated on both sides with permatex aviation sealant and get no leaks. Try to use a block of wood and a hammer to get pan as true as possible. You can pick up the high spots by rubbing over the pan with a large file. I have NO luck with silicone lol

The Riot
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Tractors Owned: 1963 Cub - Big Red
1972 Cub - Gramps

Re: Pan Leaks

Postby The Riot » Mon Feb 13, 2017 9:02 am

Hello Eugene,
I'm sure it's pretty simple but RTV has me stumped right now, what does it stand for?

StaninlowerAL,
I have the reinforcing flatbar and believe either I or someone before me overtightened, will straighten as well as possible and use the aviation permatex at reassemble.

Stevetractor,
You are probably correct. I now have the tractor split and plan to send the Retainer to tst for machining and a new seal. It looked like when I opened her up that there was leakage between the ID of the retainer and the OD of the seal, typical. This is a new seal I put in very recently, the tractor just went through a complete restoration, currently at about 90% complete, looks great, but couldn't stand having it leaking. I'm pretty sure that the Pan is leaking as well, so will straighten the flange out as well as possible and reassemble with the Aviation Prematex and the RTV gasket as Eugene recommends.

Thank you, Gents !

The Riot

Eugene
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Re: Pan Leaks

Postby Eugene » Mon Feb 13, 2017 9:16 am

The Riot wrote:Hello Eugene,
I'm sure it's pretty simple but RTV has me stumped right now, what does it stand for?
Room Temperature Vinyl.

Comes in a tube. You can purchase it from your local auto parts store. There is quite an assortment of products, suitable for different uses.

I keep a tube or two of different purpose RTV on hand. I use it frequently. In many cases it's less expensive than purchasing a single gasket or ordering a gasket - - or the expense of driving to town to pick up a gasket. Does an excellent job. Compensates for uneven parts surfaces. If you need to remove the part the old RTV peels off, easy clean up.

The main thing when using RTV is to make sure the mating surfaces of the parts are clean. After scraping off old gasket material, I spray off the mating parts with brake cleaner to remove residual oil.
I have an excuse. CRS.

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Urbish
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Re: Pan Leaks

Postby Urbish » Mon Feb 13, 2017 9:17 am

The Riot wrote:I'm sure it's pretty simple but RTV has me stumped right now, what does it stand for?


RTV = Room Temperature Vulcanizing. Commonly available as silicone gasket-maker sold in small tubes.

Stevetractor
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Re: Pan Leaks

Postby Stevetractor » Mon Feb 13, 2017 3:43 pm

New seal in repaired retainer + new pan and retainer gasket+aviation sealant = no leaks. Your right though can't stand oil leaks. Lol. The 68 I'm working on now could have competed with the Exxon Valdez :censored: l

The Riot
5+ Years
5+ Years
Posts: 119
Joined: Mon Aug 06, 2012 7:08 pm
Zip Code: 77441
Tractors Owned: 1963 Cub - Big Red
1972 Cub - Gramps

Re: Pan Leaks

Postby The Riot » Tue Feb 14, 2017 7:41 am

Thanks all. I'll post results once I get my retainer back and get her back together with new gaskets and fresh sealant, either aviation permatex or RTV.
#NO LEAKS..............

Regards,
The Riot


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