Permatex 2B is not a gasket compound, it is a gasket sealant. It fortifies the gasket with a protective layer, making the gasket both oil and waterproof. I have been using this stuff for years, and I have NEVER had a gasket fail me when using it.
Fel-Pro rear differential cover gasket
- Thread starter wavinwayne
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I find it easier to just use the gasket. It was less than $5 from the store. I am no expert, but I thought that they were designed for gaskets? The gasket I bought is a direct fit.
marc
Goldenrod nailed it. That is the stuff to use.
Old-timey Permatex rules. I paint them with Permatex #3 (Aviation) or Super 300 (seemingly the same thing). Unbolt the cover 10 years down the road & it peels right off with little or no gasket damage. I've re-used gaskets many times with no more than another slathering. Gas or oil won't eat it, but it cleans up easily with alcohol, as does #2.
I also use yellow 3M (Super Weatherstrip) to glue a gasket to a cover, and the above-mentioned Permatex on the block or head side, and rarely need a new gasket for anything. Works great on old Chevy cork valve cover gaskets.
I also use yellow 3M (Super Weatherstrip) to glue a gasket to a cover, and the above-mentioned Permatex on the block or head side, and rarely need a new gasket for anything. Works great on old Chevy cork valve cover gaskets.
RTV most assuredly works well on gaskets.
It seals extremely well, and makes any subsequent removal very easy.
I've used it for decades professionally.
When any Permatex is used on gaskets, they are very hard to remove and clean.
That's why it is called Permatex [permanent].
It seals extremely well, and makes any subsequent removal very easy.
I've used it for decades professionally.
When any Permatex is used on gaskets, they are very hard to remove and clean.
That's why it is called Permatex [permanent].
I use Hylomar on difficult gaskets (e.g. Ford 5.0 water pump - also used a Victor Reinz steel sandwich gasket for that application) with great success, including a Fel-Pro differential gasket for a Ford 8.8 rear axle with a Ford SVO/TA Performance Rear Axle Girdle - seals perfectly, and is easy to disassemble if the need arises. Great stuff.
What was around first before RTV? Thats rite,"gaskets".I use one on my 8.8 differential too,along with a very thin spread of RTV; its the best of both worlds.BTW,this is the part number for the 8.8 differential gasket;
FelPro RDS-55431
I cast my vote with GoldenRod and others for Permatex #2 (a.k.a 2B). If I can't install a gasket dry, or need some extra help, Permatex 2B is my first choice. It has served us all well for decades. I avoid RTV unless their is some very compelling unique reason. Permatex #2 is an effective pipe thread compound too.
Until they started adding alcohol to gasoline, Permatex #2 was usable for use around fuel connections too. Unfortunately #2 is soluble in alcohol and that is why you can no longer use it to seal a connection exposed to gas. The upside is that it is soluble in any kind of alcohol -- rubbing, denatured, vodka -- which makes removing it from your hands and other unwanted places fairly easy.
Yeah, some old school stuff really is better.
Until they started adding alcohol to gasoline, Permatex #2 was usable for use around fuel connections too. Unfortunately #2 is soluble in alcohol and that is why you can no longer use it to seal a connection exposed to gas. The upside is that it is soluble in any kind of alcohol -- rubbing, denatured, vodka -- which makes removing it from your hands and other unwanted places fairly easy.
Yeah, some old school stuff really is better.
Be that as it may, I don't understand the "best of both worlds" comment. If a sealing solution works, it works, be it RTV or a gasket. I just cannot understand the need to shell out $$$$ for a paper/fiber gasket, that is likely not reuseable when that little 1/8" of RTV on the diff cover does the proper job all by itself. I don't knock using a paper gasket, I just don't understand the "why" of it.quote:
Originally posted by BlueOvalFitter:
What was around first before RTV? Thats rite,"gaskets".I use one on my 8.8 differential too,along with a very thin spread of RTV; its the best of both worlds.BTW,this is the part number for the 8.8 differential gasket;
FelPro RDS-55431
?????? <That is all I can say in response. If there was ever an apples to oranges comparison in a post, you nailed it.quote:
Originally posted by BlueOvalFitter:
Best of both worlds is the gasket with RTV on it.When you install an intake manifold gasket,do you just install the gasket or do you use RTV at the ends of the gasket where it joins the head and maifold together? I bet you use RTV.....nuff said![/QB]
Is that the best you can do? Admit it,gaskets have been around forever and combined with RTV they only improve the sealing ability.
Well, not in this application. If you have a 100% reliability rate, and nothing I have seen in the shop contradicts that, then adding a gasket is superflous. The ONLY rear cover leaks I have witnessed were due to bent covers due to abuse or some idiot jacking up the rear of the car via the diff.quote:
Originally posted by BlueOvalFitter:
Is that the best you can do? Admit it,gaskets have been around forever and combined with RTV they only improve the sealing ability.
The only point of any of my posts in this thread is: The current RTV only solution is as close to 100% reliable as any seal can get, why is an addl gasket needed if it renders no real world benefits? If it ain't broke.....................
On a differential, the fel pro alone or the RTV alone will work 100% fine. Diffs generally don't leak at the cover if directions are followed and it is done properly.
Would you use only RTV instead of a gasket on an intake manifold? If you say no then isn't that contrary to what you believe?
???????????????????????????????????????????????quote:
Originally posted by BlueOvalFitter:
Would you use only RTV instead of a gasket on an intake manifold? If you say no then isn't that contrary to what you believe?[/QB]
Man, thats all I got. Your last two posts have made no logical sense whatsoever. How you can infer the need of a gasket/RTV for an intake manifold vs a diff cover, well, wow.
You're the one saying RTV is so good that you don't need a gasket. Or is that for differentials only? You should clarify that in your responses or some will take it as "all you use" is RTV,instead of gaskets!
You can use a Hi-Tack Gasket Sealer in conjunction with the Fel-Pro. I have done this with a gasket for the trans pan of my '95 4l60e (added a thin line around the pan to hold the gasket while I bolted the pan in place) .
With my '96 Vic, is used a Fel-Pro gasket without any hi-tack sealer. no leaks
On my '95 K1500, I used RTV. Worked great and no leaks. I had doubts at first,but no worries.
Goodluck
With my '96 Vic, is used a Fel-Pro gasket without any hi-tack sealer. no leaks
On my '95 K1500, I used RTV. Worked great and no leaks. I had doubts at first,but no worries.
Goodluck
Best of both worlds is the gasket with RTV on it.When you install an intake manifold gasket,do you just install the gasket or do you use RTV at the ends of the gasket where it joins the head and maifold together? I bet you use RTV.....nuff said!
You were a back counter parts guy right? Always messing with the techs.quote:
Originally posted by BlueOvalFitter:
You're the one saying RTV is so good that you don't need a gasket. Or is that for differentials only? You should clarify that in your responses or some will take it as "all you use" is RTV,instead of gaskets!
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