Silicone exhaust coupler

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Haric said:
You can make the pins out of partially threaded Allen screws. I think those pins are 5mm? Cut the Allen head off and the threaded part with a dremel. Then heat it to a cherry red with a torch and dip it in motor oil or water
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Ok am I'm reading this right...go ahead and thread a m5 screw through it. Cut off each end, heat it up and dunk in oil? How hot? Like propane hot, map hot...oxy acetylene??
 
Jshaff16 said:
Ok am I'm reading this right...go ahead and thread a m5 screw through it. Cut off each end, heat it up and dunk in oil? How hot? Like propane hot, map hot...oxy acetylene??
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Cut the ends circled in the pic
92D72F6D-D00E-417B-85EF-C1E2F94233D8.jpeg
You’re keeping the part that’s not circled which will be your pin. You can use propane or mapp which ever you have. Heat that part until you see it glowing red then dip it in used motor oil (which i prefer) or water. Doing this makes the pin stronger
 
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Its called case hardening, there is a color/ temp you aim for for different steels, the used engine coil theory is it will attract the carbon molecules in the oil and attract them to the outer layer of the steel, when quenched. It should (if memory serves) help to align the molecules in the steel differently making the outer layer harder/stronger. The drawback is once its hardened it loses malleability, so it will have a tendency to snap instead of bending. (Not that, snapping is a major concern with a half inch long pin)
 
Seandonato73 said:
Its called case hardening, there is a color/ temp you aim for for different steels, the used engine coil theory is it will attract the carbon molecules in the oil and attract them to the outer layer of the steel, when quenched. It should (if memory serves) help to align the molecules in the steel differently making the outer layer harder/stronger. The drawback is once its hardened it loses malleability, so it will have a tendency to snap instead of bending. (Not that, snapping is a major concern with a half inch long pin)
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Sean

This true but also remember there is oil, air, and water materials and each one will react different if not done correctly.
 
Alright so im reporting back on how the permatex ultra copper held up instead of a silicone coupler and im gunna say it did very well. Granted its a one run deal but It held up well and its not discolored..i believe the stuff is rated for 700 degrees intermittent.
 
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