M923a1 muffler question

Ue413

Member
205
2
16
Location
Springfield, Missouri
Does anyone know if water gets inside these mufflers and ultimately sits and rusts them out? Is there a source for used/new? (Or a alternative non-military)

both my trucks have holes and would like to repair.......
 

juanprado

Well-known member
Steel Soldiers Supporter
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1,246
113
Location
Metairie/La (N'awlins)
Yes, Water definitely gets in and rusts them out from the inside especially if they sit up for long periods of time. My muffler literally blew bottom apart on my 4 hour recovery back home.

Very easy way to prevent this is to buy a simple rain/weather cap at any heavy duty parts store.
 

sweetk30

Member
315
5
18
Location
horseheads,ny 14845
I just replaced one from the whole bottom gone .

got 4ft of 4" pipe . cut off flange from old muffler .

reclamped it to pipe set up new 4" pipe section made angle cuts and welded up and clamped just like muffler to bracket .

reinstalled safty cage and welded on top flange and rebolted on turn out .

all good . bit louder but not bad at all. better than blown out muffler behind cab .
 

fuzzytoaster

Well-known member
Steel Soldiers Supporter
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1,813
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Location
Fort Worth, Texas
I've had the same issues on many of my trucks and a flap will solve the issue after a replacement is installed. Good used ones are about $75 and new are $150 ballpark so not too bad.
 
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