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The AN3 to m6 adapter has two interfaces. The teflon tape is needed on the m6 side as there are not that many threads and a tapered end to give a nice seal with the slave cylinder like the m6 bleeder valve it replaces.
Initially, I did not use tape and the m6 interface leaked. I made the mistake of tightening it to stop the leak and the m6 side of the adapter sheared off and I had to get another adapter. Andreas @AOW162435 suggested teflon tape on the second go around and it worked perfectly. Finger/wrist tight like the m6 bleeder valve that it replaces as it is probably closer to a m3/m4 or less of a bolt since it is a machined hollow piece of metal and not a solid bolt.
Several folks have asked about the bracket I used, so here's a close up:
Made the bracket myself out of bent 1/8" Aluminum (6061 in my case which has to be heated in order to be bent). I'd recommend 5052 or similar if you're starting from scratch.
I ran the line through the engine tin with a grommet as opposed to around/above the engine bay cross brace so that I don't have to remove the fitting when I drop the engine.
Several folks have asked about the bracket I used, so here's a close up:
Made the bracket myself out of bent 1/8" Aluminum (6061 in my case which has to be heated in order to be bent). I'd recommend 5052 or similar if you're starting from scratch.
I ran the line through the engine tin with a grommet as opposed to around/above the engine bay cross brace so that I don't have to remove the fitting when I drop the engine.
Very impressive. I think you may have some buyers if you want to produce a few.
Leaked immediately. I didn't notice it until I cleaned up all of the fluids around the slave cylinder/transmission before buttoning everything up. May be a manufacturing/casting difference with my slave cylinder as the adapter itself is just a machined piece of metal.