[Mgs] Assembly goo overload

[Michael Singleton]

The good news is that Permatex = Loctite, it is the same company. Next, one
size does not fit all. You can look on the Permatex/Loctite website and they
have an extensive description of their products. For the most parts, in the
silicone adhesives line, most of the colors have the same product
description except for color. So purchase the color that color coordinates
with the parts being held together. 

There are some areas where silicone is not happy. Cork gaskets depend on
absorbing oil, and expanding to form a seal - valve covers, some pan
gaskets, thermostat housing gaskets. In cases where I want to re-use the
gasket, e.g. valve cover gaskets, I use a product called Gaskacinch, been
around since forever. It is a contact cement, apply a light coat on each of
the surfaces to be sealed, allow to dry somewhat, stick the 2 parts
together. Use this stuff on only one side of the gasket and one of the parts
to be installed, in the case of valve covers, glue the gasket to the valve
cover. The side of the gasket sealing to the cast iron side should be
lightly coated with grease, I use lithium grease. This way when you next
remove the cover, the gasket will release from the head while remaining
attached to the cover and can be re-used, at least until the cork compresses
too much to seal. 

In the case of thermostat housings, where I never re-use the gasket, I use
Permatex #2 non-hardening aviation gasket sealer. This stuff has been around
since forever also. It was the stuff that all the Model A Ford guys used,
when the cars were new. It doesn't harden, and so stays gooey. Don't confuse
it with Permatex #1 hardening aviation gasket sealer, which does harden, and
doesn't come off without serious work and a very sharp chisel. It is like
permanent!! The #2 Permatex also seals studs and bolts that go into water
jackets and keeps them from leaking.

Finally, Head gaskets. Use either nothing, or the manufactures recommended
sealant. Do not use silicone, unless the manufacture of the head gasket
specifically says it is OK. Payen composite head gaskets are pre-coated with
a sealant and that is all that is necessary. Older copper gaskets can use a
"Kopper Koat" sealant, or similar product.

That should be enough to get by on the average MG. Modern cars are a
completely different subject, in those cases follow the manufacturer's
recommendations scrupulously (without fail), several kinds of sealants can
kill sensors and such.   


Michael Singleton
Sportscars Ltd
10170 Croydon Way
Suite M
Sacramento, CA 95826
 
(916)366-0330
mike at sportscarslimited.net
 

-----Original Message-----
From: mgs-bounces at autox.team.net [mailto:mgs-bounces at autox.team.net] On
Behalf Of mark lapierre
Sent: Saturday, May 14, 2011 5:52 AM
To: healeys at autox.team.net; mgs at autox.team.net
Subject: [Mgs] Assembly goo overload

Its been awhile since I have shopped the Eng/ Car assembly adhesives.  Now
there is Blue,  Copper,  Black, High temp, Med. temp, 1B, 2B, and of course
our favorite Halomar ( I still have 3 tubes left)
 
Its sensory overload.   Is there one product that will work for intake
gaskets, and eng.
covers, that you can apply and fly and not have to let  dry and retorque
that they suggest?
 
The guys  on the weekend gear head shows seem to lean toward the Lock Tite
brands which I couldn't find at all.  Our stores carry Permatex.
 
Sorry if this is a repeat,  I may not have been paying attention before.
 
Mark
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