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: Loc-tite for an oil seal
: Loc-tite for an oil seal -- tomnkc	Post Reply	Top of thread	Engineering Forum

Posted by: Marky ® 07/01/2009, 07:14:16 Author Profile eMail author Edit

Hi Tom....Try Loctite 638. It's a green retaining compound. I use this stuff for maintaining seals and stuff on our old machinery.

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: : Loc-tite for an oil seal
: : Loc-tite for an oil seal -- Marky	Post Reply	Top of thread	Engineering Forum

Posted by: Kelly Bramble ® 07/01/2009, 20:30:39 Author Profile eMail author Edit

I was just at Ace Hardware and they have Loctite red and green I think. For a small squeeze tube it was $8 and large $22. I'm in Georgia.

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: : Loc-tite for an oil seal
: : Loc-tite for an oil seal -- Marky	Post Reply	Top of thread	Engineering Forum

Posted by: CCR5600Design ® 07/01/2009, 09:17:00 Author Profile eMail author Edit

Just a thought, but if this seal is repeatedly pushed out, I would think you are building some amount of pressure behind the seal to force it out. Any chance you can relieve this pressure or find the source of it and correct the problem? Ron

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: : : Loc-tite for an oil seal
: : : Loc-tite for an oil seal -- CCR5600Design	Post Reply	Top of thread	Engineering Forum

Posted by: tomnkc ® 07/01/2009, 17:24:35 Author Profile eMail author Edit

I thought about that and will look when I take it apart. I did check the crankcase ventilator and it is functioning properly. This engine uses a pressurized lubrication system and I am not sure at this time how the oil is delivered and returned to this particular area. I will ask someone who knows more about it than me.

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: : : : Loc-tite for an oil seal
: : : : Loc-tite for an oil seal -- tomnkc	Post Reply	Top of thread	Engineering Forum

Posted by: randykimball ® 07/01/2009, 23:41:57 Author Profile eMail author Edit

Nix the Loc-Tite. that is not what Loc-Tite is for, if is for theads and press pins.. your auto parts store has sealant for this use. Ask them.. it the first attendant does not seem to have the correct positive answer ask a different one or go to a different store... or stop at a good quality repair shop (not a supper store) and ask the resident teck. The one I'm thinking of (I can't think of the name) is a copper colored honey like product made by Permatex.. OR .. use a product at the auto store glue and sealant rack called Form-a-Gasket..by: Permatex, (don't be fooled into buying a different similar product) (I have been using Form-a-Gasket since I was taught to in the US Navy engineering schools 40 years ago) it comes in a can similar to pipe dope and is applied with an acid brush attached to the inside of the lid. It will need to set overnight and the engine temp will stiffen it up... buy the can about the size of a whiskey glass because you will find a thousand uses.. I always apply it to both sides of my gaskets, except head gaskets. They always seem to last longer, seal better, stick on so I won't drop them in difficult locations, and they are more likely to come off in one piece when I need to remove them. It is thick about like roof sealant and is nasty brown in color, try not to get it on you.. If you do you will have it on everything...it sticks to everything...use gasoline or paint thinner to remove it from you or your clothing then go right then and wash with dish soap, and then use a hand lotion. Don't wear good clothing when using Form-a-Gasket, the paint thinner or gasoline will just delute it and your will have a bigger brown stain of a deluted color value. However, if you are pushing out your main seal you may have other problems.. Also, someimes it is necessary to "stake the seal". This means after you intall the seal you upset the material at the outside of the seal holding bore to prevent the seal from exiting back out. This is standard on many bearings and seals in an aircraft application. This can be done with a small flat round punch and a small brass hammer. Don't do more damage to the constraining lip than you must. .. and remember you may want that seal back out someday. The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them. Modified by randykimball at Thu, Jul 02, 2009, 00:14:10

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: : : : : Loc-tite for an oil seal
: : : : : Loc-tite for an oil seal -- randykimball	Post Reply	Top of thread	Engineering Forum

Posted by: CCR5600Design ® 07/02/2009, 11:40:28 Author Profile eMail author Edit

Randy, I believe the sealant you are referring to is called Hylomar. I have used it with great success when sealing the engine case halves on air-cooled VW engines. This is similar to the "Hy-tack" made by Permatex that you described. Good stuff! A word of caution to those who use this stuff. If you want to get the cover or pan off that you are sealing, only coat ONE side of the gasket. I found this out when I was a teenager and put a set of valve cover gaskets on my small block Chevy. I figured if coating one side of the gasket was good, coating both sides was even better. Well... that was until I needed to adjust the valves and absolutely ruined a brand new set of Cal-Custom finned aluminum valve covers trying to remove them. Ron

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