Thread compounds?

[Laker]

I am re-assembling my exhaust , including new standpipe , and I would like to bed the threads as I turn them , especially the 45 degree elbow which must come to rest at a specific attitude. What to use? One recommendation I got is regular teflon tape. Will that product tolerate the heat? Plumbers putty?

Launch itchy ,
Laker

[SEMIJim]

I am re-assembling my exhaust , including new standpipe , and I would like to bed the threads as I turn them , ...
I used to wrench on street rods, back in the day. Never heard of "bedding" the threads.

If I wanted to put anything on the threads of nuts & bolts for exhaust system parts, it'd probably be anti-seize.

Jim

[TomG]

Laker,

I just re-did my exhaust (including a new standpipe) and asked this very same question. Conventional wisdom was, sealants or compounds weren't really needed. Apparently, the carbon fills in what tiny gaps there might be in short order. I did use anti-seize on the exhaust flange and the on the standpipe mostly to allow for (hopefully) easier eventual replacement of the hot section. I also used the fiberglass heat wrap sold here and I recommend it. I also painted the black iron pipe hot section with high-temp paint. I was also alerted to the fact that the heat wrap and paint will give off odor and smoke for the first half hour or so. This is absolutely true. I felt like I was Mark Twain for about 30 minutes!
http://www.uscg.mil/history/img/WLR_8.jpg

[Al Schober]

Laker,
If you're assembling the 1 1/4" iron pipe, I'd use something like RectorSeal - a generic pipe joint dope. If the connection of the 45 isn't tight enough when the next nipple is where you want it, just give the 45 another turn. Completely familiar with the situation - with my Tartan 30, I come forward out of the flywheel end with a nipple, then a 45, then another nipple that I want horizontal. I use the German torque specification - "gutentight".

Al

[JOHN COOKSON]

TFE paste. Good to 3000 PSI and 400 degrees F. Also non-hardening.

Hope your itch to get out on the water gets scratched soon. Real soon.

TRUE GRIT

[sastanley]

I used Permatex. The thick stuff in the tube..#1 or #2.. I can't remember which one...the stuff that does not harden...they label the tube well.

[Laker]

Thank you panel. I reassembled the exhaust beast today , using one of the recommendations offered.

My idea of hell is being head below torso in the engine compartment twisting pipe wrenches on a hot day , forever.

The Mark Twain experience will hopefully take place in the coming week - smokey itch scratching time.
Graci , Laker