flyrotary@lancaironline.net Mailing List Archive

Hi All, Just to adding my testimonial to: > > I use RTV as a sort of gasket. If there is no gasket, it cannot blow out. I > put it on thicker around the outer parts of the flange and thinner close to > the > hole. Let it gel up for 10 minutes before you torque it down. Any bit that > extrudes into the port area will vanish. Retorque after the first heat > cycle. No > leaks since 1980. You must grind the whole flange dead flat once all of the > welding is completed. > > Lynn E. Hanover > > > Thanks for the extra info Lynn. Still hard to believe this RTV thing, but > I'll give it a try. I feel like I should be paying for this course in > fabrication :-) High temperature RTV (usually orange stuff) is tough stuff, indeed. I've been using it for years as gasket substitute for EGR valves (plenty of exhaust heat there.) Never had a leak. Dale R.

Message

I use RTV as a sort of gasket. If there is no gasket, it cannot blow out. I
put it on thicker around the outer parts of the flange and thinner close to the
hole. Let it gel up for 10 minutes before you torque it down. Any bit that
extrudes into the port area will vanish. Retorque after the first heat cycle. No
leaks since 1980. You must grind the whole flange dead flat once all of the
welding is completed.

Lynn E. Hanover

Thanks for the extra info Lynn. Still hard to believe this RTV thing, but I'll give it a try. I feel like I should be paying for this course in fabrication :-)

BTW, In your honor, I hit the Ace aircraft supply today, in search of rubber bushings for my evap mounts.

Cheers,

Rusty (When Lynn types, I archive)