Exhaust gasket

[djh66]

Just replaced my main oil seal and rebuilding the engine (LIS GT186). The new gasket set I've purchased has a thick gasket material type exhaust gasket, I've always used copper gaskets before, is there any reason I should not use the provided gasket?

[speedy]

There is no reason you can't use it,but they are not as good as a copper faced one.To be honest, for a couple of quid i'd personally buy a separate copper faced one.Some years ago on a cast cylinder,i used to use a solid copper gasket that Dave Webster used to make.They were re useable and never blew.Cheers,Speedy.

[djh66]

Can I re-use the copper gasket I took off?

[Muttley McLadd]

Is it solid, or one of the ones that bends when it's tightened?

[djh66]

the later

[Muttley McLadd]

Mag to grid..

Scooter Restorations do the solid ones for next to nothing.

No cheese involved in the making

[mickdale]

Mag to grid..

Scooter Restorations do the solid ones for next to nothing.

No cheese involved in the making

don't the solid ones need annealing when using/re-using?

[Muttley McLadd]

don't the solid ones need annealing when using/re-using?

That's less effort than a rebore/piston/crank/head change because the cheese one has disintegrated at 75mph in the outside lane of the motorway.

The downpipe on my clubman is made in such a way that the head cowling comes off without the need to loosen the exhaust. There's no reason to remove the downpipe that I can think of.

[dapper]

Mag to grid..

Scooter Restorations do the solid ones for next to nothing.

No cheese involved in the making

don't the solid ones need annealing when using/re-using?

Someone once told me to heat up the solid copper gasket until cherry red and then allow to cool. I totally feckin ignored him, and linnished both sides of the solid copper gasket on a piece of glass with wet 'n dry taped to it, to ensure it was perfectly flat. I do this to the U bend exhaust gasket face too to ensure I get the best seal possible. Also a smear of high temperature silicon on all faces.

[Grumpy225]

It's the opposite for copper. Heat then cool with cold water. Makes it softer. I anneal my copper soft jaws on my vice like that.

Your best leak prevention is from surfacing your exhaust flange (either a stub or U bend).


http://m.youtube.com/watch?v=_o59kYl8DoI