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Message started by 87 savage on 07/29/12 at 17:26:38

Title: To seal or not to seal
Post by 87 savage on 07/29/12 at 17:26:38

I believe it was on this forum that I read not to use gasket cement or ultra grey on the engine side covers. Would like to get some feedback. I am rebuilding my 87 engine w/ 17000 miles, and I would like to hear some opinions on sealant or no sealant and why. Thanks in advance. :D

Title: Re: To seal or not to seal
Post by SaVaGeEaRL on 07/29/12 at 17:36:11

My opinion, as an auto tech for 26 years, no sealant on gaskets.

Title: Re: To seal or not to seal
Post by Dave on 07/29/12 at 18:00:35

I don't use any sealant on gaskets.  The gasket "is" the sealant.

I have a friend that has raced Ducati's, and he uses a product called Hylomar on one side of the gasket.  It is a non-hardening sealer and it prevents the gasket from bonding to the metal - so the part can be removed without damaging the gasket.  (Hylomar is hard to find, and I have never used it.)

Title: Re: To seal or not to seal
Post by Serowbot on 07/29/12 at 18:06:58

I sealed mine, cause I tore the cr@p out of it taking it off... My bad...

.. but in principal, I'm with Earl n' Dave... no sealer... (a little Vaseline on one side will make it come off sweet next time)...

Wish I'd done that... ;D...

Title: Re: To seal or not to seal
Post by Boofer on 07/29/12 at 18:30:28

Serow, I used a dab or two of some Permatex? or whatever to hold the gasket in place while I mounted the cover. I used sealer like suntan lotion--rubbed it in--not globs.  8-)

Title: Re: To seal or not to seal
Post by 87 savage on 07/30/12 at 02:17:17


32282F2A2D2C3A335F0 wrote:
My opinion, as an auto tech for 26 years, no sealant on gaskets.

Quote:
but in principal, I'm with Earl n' Dave... no sealer... (a little Vaseline on one side will make it come off sweet next time)
[quote]I don't use any sealant on gaskets.  The gasket "is" the sealant
[/quote]

Well, I guess that "Seals" it, No sealant. Thanks for all the input guys.  :)

Title: Re: To seal or not to seal
Post by srinath on 07/30/12 at 11:45:25

Sealer as in silicone - usually its not much of an issue, however the savage oil passage goes through the wall of the right side case. If you "close" that with errant sealant, you wont get oil to the head.
I've used sealant on many bikes and cars, and ironicaly my chrysler lebaron transmission leaks the least oil with only silicone and no gasket. I use permatex purple stuff on everything, even had some on my cereal this morning. Carbs, engine covers, everything has it. However that isn't silicone, its more like gasket glue. It stays liquid, never hardens.
Cool.
Srinath.

Title: Re: To seal or not to seal
Post by 87 savage on 07/30/12 at 15:35:29


26273C3B34213D550 wrote:
I use permatex purple stuff on everything, even had some on my cereal this morning.
Srinath.


Hey Srinath, Are you talking about the Purple Permatex thread locker? Or the flange sealant? I've never used the purple. Always use the ultra grey, but I like to try new stuff if it works good.

Title: Re: To seal or not to seal
Post by Savage_Rob on 07/30/12 at 16:21:47


0C373A2D3C302B2D363E332C5F0 wrote:
I don't use any sealant on gaskets.  The gasket "is" the sealant.

I have a friend that has raced Ducati's, and he uses a product called Hylomar on one side of the gasket.  It is a non-hardening sealer and it prevents the gasket from bonding to the metal - so the part can be removed without damaging the gasket.  (Hylomar is hard to find, and I have never used it.)


I've never used it but I found this on a search: Hylomar (http://www.hylomarsealant.com/_resources/_html/order.html?gclid=COah_IK_wrECFYao4Aod1BQAnQ)

Title: Re: To seal or not to seal
Post by 87 savage on 07/30/12 at 16:59:56


1321362127251F122F22400 wrote:
I've never used it but I found this on a search: Hylomar (http://www.hylomarsealant.com/_resources/_html/order.html?gclid=COah_IK_wrECFYao4Aod1BQAnQ)


Sound like a super product, but they sure don't give it away!  [smiley=shocked.gif]

Title: Re: To seal or not to seal
Post by Digger on 08/05/12 at 21:49:48


6A67696E797F3A3C32330B0 wrote:
[quote author=1321362127251F122F22400 link=1343607999/0#8 date=1343690507]
I've never used it but I found this on a search: Hylomar (http://www.hylomarsealant.com/_resources/_html/order.html?gclid=COah_IK_wrECFYao4Aod1BQAnQ)


Sound like a super product, but they sure don't give it away!  [smiley=shocked.gif][/quote]


Permatex sells it, too:

http://www.oreillyauto.com/site/c/detail/PER0/85249/N2364.oap?ck=Search_N2364_-1_-1&pt=N2364&ppt=C1984

I've used it, but do not have enough experience with it to endorse it, yet.

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