is there such thing as exhaust gasket in a tube ?

I've recently fitted my new 4 into 1 exhaust. However the headers are not flared at the ends , so I need a fat gasket at the end . They seem to fit and hold fine without the "BIG NUT" , and there are leaks on the #1 and #4 engine ports in the top corners where it is etched out off the block. Anywho.. Is there a product out there to clean my existing gaskets and maybe brush onto the exterior to make a proper seal?

 

You may have not got it fitted right, yet.

You might have to "Stack" some Exhaust Flange Donuts.

Permatex - High Temp - Spray a Gasket.

That, ... or Valco

http://www.holeshot.com/chemicals/permatex_prod.html

 

Thanks Rick!
You've just made my life a whole lot easier. I m guessing the prep is the same as paint? sand, wash ,dry, wet sand, dry, and apply.

OH yeah and whats an exhaust flange donut? And where can I get them ?
Thanks a million .

 

A Flange Donut is a Gasket that is placed at the machined surface of the Cylinder Head where the Exhaust Header's end is attached.

They insure a Gas Tight Seal at where the end of he Header Pipe attached to the Cylinder Head.

They are called Donuts because they resemble a donut in appearance.
Round, with a hole in the center, most are made from asbestos with a copper sleeve to repel the extreme heat they are exposed too at the exhaust port.

 

Permatex Ultra Copper in a tube is some amazing stuff.
Heat proof to 650 * F , rubberized, easy to work, cures in 24 Hours.

 

you can use clear silicone, plumbers now use it to seal boiler flues, cheap as chips.

 

I vote for the donut

 

A complete set of new gaskets (donuts.) PM Chacal, Yamaha wants way too much for them (something like $22 apiece if I recall) do it right and do it once. Start messing with "goop" and you'll be fussing with it forever. Chances are your old gaskets are still in there, pounded into the head to the point where they appear to be part of their surroundings and are causing issues as well.

 

Well I went with the permatex ultra copper gasket maker, and sealed up the ports real nice , Now if I can try to hold my breath as to not be overcome by the toxic fumes Ill be set.

So with that said, I'm going to remove the headers , and the silicone gasket,pop out the old copper ones,clean it out nice with brake cleaner. Put a thin layer of grease on each new gasket and install them. ( which I paid 20$ for a set of 4) .

I cant find flanges for the headers, so I'll fabricate some with layers of muffler tape and slivers of popcan metal, they will take the proper form and align them selfs correctly as I tighten them in the engine ports . That is the plan.

 

grease will last all of 2 seconds.

 

grease is just to get it to stick on there ... thats what my old bike mechanic dude told me .. he's the bike mechanic . Again its only so it does not fall out while Im mounting the header.... just following his tips . I do agree with you , the grease will not withstand the extreme heat of the engine block. Its only purpose is to help it stay in there ..

 

silicone does both jobs, holds the gaskets in place & seals.

 

OK , to clarify I will NOT be using silicone at all , because it burns and stinks and is a temp fix . unless you disagree , and can tell me it eventually just stops cooking and throwing off toxic odors . in which case Ill let it run all day .

 

your shout, I used silicone & never had a wiff of anything.good luck.

 

What brand did you use ? maybe its the paint on the muffler than? what ever it is is killing me slowly. I just assumed since it was the last thig I put on it had to be that. Unless it takes a few dyas for the paint to bake onto the muffler?
I guess the only way to Find out is to remove it and smell for myself. thanks for your comments.

 

selleys clear silicone sealant, type for glass-aquariums etc. don't know if you can get that brand where you are.
I would say the fumes are from your headers & I would not run the bike in an enclosed area.