Gasket

[Diamond Geezer]

Hi

What do you guys use if anything between the exhaust manifold and the exhaust.

[Alan Gorham_]

Assuming you are talking about a glow engine and not a petrol then 5 minute epoxy. Seals a treat and yet can be peeled off easily when needed.

Edited September 9, 2021 by Alan Gorham_

[Peter Christy]

What he said! ^^^

 

5-minute epoxy also keeps the silencer quiet rigid against the crankcase, stopping the screws from coming loose! (Edit: No! DON'T put epoxy on the screws!!!)

 

--

Pete

 

Edited September 9, 2021 by Peter Christy

[dave windymiller]

Ive found when using paper gaskets as supplied by some engine manufacturers, the exhaust works loose after a while.  I dont bother with the gaskets now.  

[Martin Harris - Moderator]

Metal to metal and doing the screws up properly has always worked for me. 

[Mike T]

Metal to metal is fine if the mating surfaces are new and/or finely machined.  Note that some silencers/mufflers have very thin walls on their top and bottom edges which will only allow a very thin bead of epoxy and this may blow out if you don't get the assembly just right. 

 

I usually clean the engine with meths then apply a thin bead of epoxy with a cocktail stick so it settles into a nicely formed bead.  The muffler gets a light wipe of oil before being loosely assembled to the engine.  At 4.5mins., lightly close everything up to form the seal, then fully tighten after an hour or so. 

 

Beware that where the mating faces are quite broad, the joint can be very strong indeed.  I once had to use a shocking amount of force to remove a Bisson muffler from a Moki 210!

[Keith Berriman]

I just use a thick card material that comes from various food packaging  never had any problems 

( Fingers crossed now )

[Barry Slater]

I always used that white plumbers tape, PTFE if I remember correctly. Lay several layers across the exhaust opening

then fit and tighten the muffler. On first start the tape blocking the exhaust port is blown away leaving a good seal.