Lister Engines > Listeroid Engines

gasket for the 6/1 - which side up?

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tyssniffen:
So, this seems like a really dumb, but really important question, if in fact it does matter.

I'm looking at a brand new copper gasket for my 6/1, and there's a slight difference between the sides.  One side has a bit of a ridge:



and the other side seems completely smooth:



Which side should face the sky, if it matters?

mike90045:
A copper gasket is just a thin sheet of copper.  Your pic seems to show some thick material in the middle ?

I think the consensus is that this style leaks easily, and that the style with RTV sealer around each hole and a crimped on fire ring for the cylinder, holds up well.

So I don't know which side goes up.

sirpedrosa:
Hi tyssniffen

Just look at here: https://listerengine.com/smf/index.php?topic=8320.msg103752#msg103752

The original gaskets (and original Lister) has 2 large holes and guides to fit the gasket in correct way!

Cheers
VP

tyssniffen:

--- Quote from: mike90045 on February 21, 2020, 05:47:15 AM ---A copper gasket is just a thin sheet of copper.  Your pic seems to show some thick material in the middle ?

--- End quote ---

this is the style my machine came with, and what I've been told is the standard gasket.


--- Quote from: mike90045 on February 21, 2020, 05:47:15 AM ---I think the consensus is that this style leaks easily, and that the style with RTV sealer around each hole and a crimped on fire ring for the cylinder, holds up well.

--- End quote ---

Well, I've previously used this sort:


and had trouble with that as well.    I had one of those in place (perhaps not cranked down hard enough) but after sharing a photo of it, I got a lot of advice here https://listerengine.com/smf/index.php?topic=8711.msg101309#msg101309  that it was the WRONG type.   Thus, I went back to the smooth copper. 


--- Quote from: sirpedrosa on February 21, 2020, 08:40:55 AM ---
Just look at here: https://listerengine.com/smf/index.php?topic=8320.msg103752#msg103752

The original gaskets (and original Lister) has 2 large holes and guides to fit the gasket in correct way!

--- End quote ---

Sorry, but I don't see this showing *which side* of the copper goes up.  It's not the orientation, as the studs and holes force a specific sitting... it's which side is up and which side is down - that's the question.

sirpedrosa:
Hi Tyss

Original ONLY can go one way.

And the side of the ridge stay faced down.

Cheers
VP

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