Parts needed for next scheduled liftoff.

[Pig9r]

Rusty, I don't think the gasket is soldered on but (if I remember correctly) the gasket itself has lead or tin on it that, once fitted and heated by the exhaust, seal it. I think I hit one or two of mine with the propane torch to get it to fit better since it was reused.

 

[rusty]

Maybe that's the ticket Pig9r! When I remove the bypass to replace the hardened grommets, I'll take the propane torch to it for a short time to see if I can get it to seal a little better. In fact, beings I've had her warmed up since I put the bypass on, I just may already have it sealed. I'll need to check for that leak next time it fire her up.

Thanks for the suggestion Pig9r. I have a replacement coming (along with the new grommets) just in case it doesn't seal properly. I need to ask VictoryDave how he removed the one that was in the bypass before he sent it my way. Maybe just as I took the old one out of the original cat box and as you have suggested, with heat!

See ya.

 

[Sidecar Flip]

Rusty:

Bart had his Cat Box in his basement over turkey day. I don't mean the littler box, that's in the garage, I mean the one the dealer replaced with the Triumph by-pass. Now that you bring it up, I remember seeing what looked to me like a tinned, woven battery strap on the inlet spigot. Why couldn't your replace yours with a length of woven battery strap available at any farm store like TSC. or, high temperature RTV?

 

[rusty]

That may be a way to do it Flip, but for $13, it's worth it just knowing I have the part that will work, without having to figure in a lot of factors. It may wind up (the extra seal I ordered) as a part in the "I might need this some day" parts bin in the corner. Like Pig9r stated, the exhaust heat itself may have allowed it to seal.

If one was to study the way the seal are manufactured, I think it would a be challange to duplicate one and have a quality part that does what it's intent is. But then again, that's just the thoughts in my little brain.

Lots of good ideas coming out in this thread guys.

See ya.

 

[Sidecar Flip]

Rusty:

For certain the cat box is heavy. I shook Bart's in hopes of hearing something inside move around but I heard nothing. They must use a porcelain, palladium plated, honeycomb substrate. Bart's really don't sound much different with the stock pipes and no cat box, maybe a little growl, that's all. Bart told me the Triumph bypass was the least expensive of all of them. He had the dealer do the install, smart guy.

It would be fair to say that if indeed the braid was tinned, it would seal itself or become soft enough to conform to the viods between the spigot and mating pipe at running temperature. Normal solder, lead/zinc becomes soft and pliable at (If I remember correctly) 700 degrees farenheit and liquid at 900. Even if it became liquid, the braid would hold it in place, effectively sealing the mating flanges. Neat idea. Of course different alloys of zinc and lead can raise or lower the two temperatures. I'm not familiar with the EGT on a 4 stroke but I do know the operating temperature of a 4 stroke diesel on the exhaust side can run from between 700 degrees to over 1200 degrees depending on the load the engine is encountering.