Exhaust Muffler Crack

[Scott Aviation]

J Model IO-360-A3B6D this morning when doing oil change and Mag overhaul, no indication on engine monitor of issues.  Thoughts to the collective? Luckily I had a full spare system but should I be concerned of a cylinder problem, Acorn welding suspected it might be excessive heat related?? or chalk this up to metal fatigue, I believe its my original exhaust from 1977. (2900 hours on Airframe) 

[Yetti]

Looks wore out.  Got your use out of it.

[EricJ]

It's repairable, too.   Don't throw it out!

 

[Guest]

That didn’t happen over night, lack of proper inspection would come to mind.  Pressure check with a vacuum cleaned during Annual Inspection would catch this type of thing.

Clarence 

[StevenL757]

@Scott Aviation,

Send this out to Acorn Welding in Edmonton, AB.  They rebuilt my entire exhaust about 9 months ago, and did an exceptional job.  They have the right jigs to be able to fit it perfectly, 

Obviously that exhaust is not airworthy, and would need a few new pieces and the whole thing aligned back to spec.  Acorn will take good care of you.  Not the cheapest, but I trust them over "another" popular shop here in the US who I used a couple of times and will likely not use again due to marginal work at best.  Attached are a few pics from my rebuild earlier this year.

Steve

[PT20J]

1 hour ago, M20Doc said:

That didn’t happen over night, lack of proper inspection would come to mind.  Pressure check with a vacuum cleaned during Annual Inspection would catch this type of thing.

Clarence 

That sounds like a good idea. I’ve never done that nor does any IA I know make it a standard practice. Do you put any kind of filter between  the shop vac and the engine? How do you check for leaks! Soapy water sprayed around? 

Skip

[Guest]

53 minutes ago, PT20J said:

That sounds like a good idea. I’ve never done that nor does any IA I know make it a standard practice. Do you put any kind of filter between  the shop vac and the engine? How do you check for leaks! Soapy water sprayed around? 

Skip

I bought an old Filter Queen vacuum, cleaned it out installed, a new filter and made a thick plastic disc for the end of the hose.  Connect the hose to the discharge side of the vacuum and pressurize the exhaust with clean air.  Use soapy water spray everywhere.

We never use it for anything but exhaust checks.

Clarence

[Scott Aviation]

13 hours ago, StevenL757 said:

@Scott Aviation,

Send this out to Acorn Welding in Edmonton, AB.  They rebuilt my entire exhaust about 9 months ago, and did an exceptional job.  They have the right jigs to be able to fit it perfectly, 

Obviously that exhaust is not airworthy, and would need a few new pieces and the whole thing aligned back to spec.  Acorn will take good care of you.  Not the cheapest, but I trust them over "another" popular shop here in the US who I used a couple of times and will likely not use again due to marginal work at best.  Attached are a few pics from my rebuild earlier this year.

Steve

Good post about Acorn. I’m lucky enough that they are only 10 min from my house as I live in Edmonton. I talked to Paul there today and he said they are getting their PMA approval come January and will be able to make complete exhaust systems from scratch and there will be a price reduction in scale once they ramp up production. Great news as no one wants to have to reuse pieces of their old systems anymore. I luckily had a complete spare muffler system that was low time and fully serviceable and went back in the plane yesterday so all is good.  I will definitely keep an eye on acorn as they ramp up their production of pma systems. 

[Guest]

Is Nanaimo BC now a suburb of Edmonton?  

Clarence

[Scott Aviation]

On 10/31/2020 at 7:07 AM, M20Doc said:

Is Nanaimo BC now a suburb of Edmonton?  

Clarence

I moved Clarence...  I moved. Lol

[Hank]

2 hours ago, Scott Aviation said:

I moved Clarence...  I moved. Lol

But didn't update your new location below your avatar . . . How was Clarence supposed to know?

[RobertGary1]

On 10/30/2020 at 5:44 PM, M20Doc said:

I bought an old Filter Queen vacuum, cleaned it out installed, a new filter and made a thick plastic disc for the end of the hose.  Connect the hose to the discharge side of the vacuum and pressurize the exhaust with clean air.  Use soapy water spray everywhere.

We never use it for anything but exhaust checks.

Clarence

My IA suggested we do this once. Hooked it up to his shop vac and blew a ton of broken glass a crud up my exhaust.

 

-Robert  

[Guest]

5 hours ago, RobertGary1 said:

My IA suggested we do this once. Hooked it up to his shop vac and blew a ton of broken glass a crud up my exhaust.

 

-Robert  

That's why I have a have one only used for exhaust system testing.

Clarence