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Author Topic: How to secure a pressure fitting in a muffler?  (Read 444 times)

Offline frank mccune

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How to secure a pressure fitting in a muffler?
« on: May 16, 2020, 07:49:09 PM »
         Hello:

          How may I secure a pressure tap in a muffler? The pressure tap holds the halves of the muffler together.  Today, the pressure tap backed out allowing half of the muffler to fall off and become lost.  My partner found it later in the day.  Would something like a Lock Tite product suffice? Or what else may work. Would solder work on the brass pressure tap? How hot does a muffler become in flight?

                                                                                              Tia,

                                                                                              Frank McCune
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Offline jerry v

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Re: How to secure a pressure fitting in a muffler?
« Reply #1 on: May 16, 2020, 09:08:59 PM »
I prefer to use red Loctite  (permanent bond). In case you have to remove fitting - use acetone to soak and soften the tread locker.
 Blue loctite is removable strength, but I won’t trust it on the muffler.
 One more solution is epoxy.

Jerry
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Offline GERALD WIMMER

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Re: How to secure a pressure fitting in a muffler?
« Reply #2 on: May 17, 2020, 06:03:30 AM »
Sounds like a H.P muffler, I would drill and pop rivet it in two other locations to hold it together and then JB weld the tap back in but heat treat it as it cures as it will stand a higher temperature this way. Soft solder melts at muffler temperatures .
Regards Gerald
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Offline Avaiojet

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Re: How to secure a pressure fitting in a muffler?
« Reply #3 on: May 17, 2020, 06:41:40 AM »
Without seeing the muffler,

I would simply put a pop rivet in the hole where the pressure tap is. They come is sizes and lengths.

I'd drill and tape another hole for the pressure tap, in a location that works for your application.

I'd stay away from glue products all together. But that's me.
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Offline John Leidle

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Re: How to secure a pressure fitting in a muffler?
« Reply #4 on: May 17, 2020, 07:29:41 AM »
  JB Weld will do the trick.
  John L.
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Offline RandySmith

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Re: How to secure a pressure fitting in a muffler?
« Reply #5 on: May 17, 2020, 10:58:45 PM »
Best thing to do is  Pop rivet the halves, and   do not  use  pressure unless this is a  combat run, for Stunt, Muffler  pressure has a long list of  bad things it causes, and  only  1  that  is  worthwhile, If the muffler halve are  threaded,  clean with acetone  and  use  red locktite

Randy
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Offline Dane Martin

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Re: How to secure a pressure fitting in a muffler?
« Reply #6 on: May 17, 2020, 11:16:55 PM »
What everyone else is saying about super clean and red loctite, but also... the hp and the split merco are relatively similar. Ensure that the mating surfaces are not only clean, but very flat. Do the ol figure 8 on a piece of sand paper trick. Lightly. Just need to see that it's flat.
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