m42racer

Today I visited with my engine builder as I have been out of the country for sometime. I saw a very interesting test been performed. They were using a special film that changes color under different clamping pressures. They were testing Head gasket and Stud sizes on an engine that is been designed to run over 55 PSI boost. I saw first hand how the Stud size,Torque and Gasket design can alter the clamping force exerted on the Gasket. This film is very thin and placed between the gasket and Block, and gasket and head. The parts are bolted together and then disassembled. The film changes different colors based upon the amount of clamping load. They can see where the loads are concentrated and how much is been applied. I asked if this should be done on the 944 Block and head combination. I was told that this indeed was done when the MLS Gasket was designed for the 944 engine application. Very cool. Just passing along what I saw.

Dr. Dynamics

Good info! Just bought an MLS!

special tool

The MLS is excellent.
MUCH better than Widefire/O-ring for extreme service.

The Widefire is less finicky.

RajDatta

On MLS gaskets, I had read and also used MLS gaskets in the past without any coating on them. When I received my head back from Jon Milledge last week, I inquired on how to install it and he recommended spraying copper eorosol spray on the outer edges for better sealing but keeping the spray away from the bore openings. I used Permatex for this application. Have not started my car yet so no way to tell how well it works.
I will keep everyone posted.
Raj

special tool

Is your mls viton coated?

RajDatta

Is that something that comes on the cometic gasket or is that the copper spray?
Raj

OriginalSterm

http://www.sensorprod.com/pressurex.php

Was the testing done with something like this?

special tool

That is the coating that the newest MLS gaskets use on the gasket itself.

RajDatta

Ok, well I just bought it 2 weeks back so I would assume it did have it.I can check my docs later to see if it has that.
Thanks.
Raj

Ian Carr

Yup, thats what my head gasket had on it.... what suddenly changed your mind? you HATED mls head gaskets 6 months ago...

special tool

The viton coating!!!!
Its excellent!

m42racer

http://www.sensorprod.com/pressurex.php

Was the testing done with something like this?
__________________

Yes that looks like the same. Not exactly sure, but I'm sure there must be several similar types out there. Very good way to see if everything worked. Simple but effective.

Buckaroo Banzi

Just received an MLS form EBS racing ordered it with viton coating is there
someway to tell it's coated? It looks no different then my last one..

thanks in advance for your response,

-BB

chilibluepepper

If you are to use a gasket dressing at all, why not use Hylomar instead of copper spray? Its properties seem ideal for the application. Does anyone have any practical experience with this application of Hylomar?

Chris White

The Cometic MLS gaskets have been Viton coated for years...