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Engine basics => Engine set up tips => Topic started by: frank mccune on May 16, 2020, 07:49:09 PM
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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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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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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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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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JB Weld will do the trick.
John L.
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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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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.