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G3GM 1973 to 1977 A-bodys. Chevelles, Monte Carlos, El Caminos, Laguna, 442, Cutlass, Malibu, GTO, LeMans, Century, Regal, Grand Am, Grand Prix, Sprint, Gran Sport, Can Am, Hurst-olds, and other 73-77 A-bodies


Differential cover sealant

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G3GM :: G3 Tech :: Engine & Driveline

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Differential cover sealant Empty Differential cover sealant

Post by SSTOOLMAN Thu Aug 06, 2015 11:24 pm

Hey guys I got some seepage, whats the best sealant for the diff cover?
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Differential cover sealant Empty Re: Differential cover sealant

Post by chevellelaguna Thu Aug 06, 2015 11:30 pm

Never had a problem with just the good quality black or orange sealer in a tube, the orange or red is usually high heat, not really necessary. Also Great Stuff, if you can find it works awesome too!
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Differential cover sealant Empty Re: Differential cover sealant

Post by Joe73 Fri Aug 07, 2015 8:07 am

I agree, great stuff is actually that.  If your using a paper gasket I'd use some Permatex Ultra Black on both sides of it.  JUST A THIN SMEAR on each side.  No need for it to squeeze out and make a mess.

If you dont want to use a paper gasket, then I would use some Ultra Black.  Run a bead around the perimeter and around each bolt hole.  Let it set up the required time and put your cover on.

If your putting on a girdle style cover then no gasket at all.  Just some Ultra Black all around.  Like the pic below.

Differential cover sealant Rear%20done%202_zps8sjuihdu
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Differential cover sealant Empty Re: Differential cover sealant

Post by SSTOOLMAN Fri Aug 07, 2015 10:19 am

I thought Great Stuff is the insulating foam you use around the house...
Do you mean the sealant Permatex gasket maker called the Right Stuff?
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Post by thatfnthing Fri Aug 07, 2015 12:00 pm

SSTOOLMAN wrote:I thought Great Stuff is the insulating foam you use around the house...

Well, it's a closed cell foam, so it would probably work. Messy, though. Smile
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Post by dynchel Fri Aug 07, 2015 2:46 pm

Differential cover sealant IMG_20150807_144359000_zpslfv0bo9m
This is what you want. Napa sells it
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