jaylw314 Posted September 27, 2019 Report Share Posted September 27, 2019 Crud. The shop was doubtful this could be repaired. How much will this set me back? Quote Link to comment Share on other sites More sharing options...
kortopates Posted September 27, 2019 Report Share Posted September 27, 2019 A welder can replace as much of that section of tubing as needed (from being too thin), including the entire section and any others sections for that matter. My experience is even if most of the exhaust is replaced with new tubing, its still much cheaper to repair than replace with new. But I am fortunate to have local access to a great shop that specializes in this work. Quote Link to comment Share on other sites More sharing options...
ArtVandelay Posted September 27, 2019 Report Share Posted September 27, 2019 Non factory exhausts I’ve seen don’t have bends, they use short straight pieces welded to make the curves.Tom Quote Link to comment Share on other sites More sharing options...
67 m20F chump Posted September 27, 2019 Report Share Posted September 27, 2019 Send it to dawley http://www.dawleyaviation.com/ 1 Quote Link to comment Share on other sites More sharing options...
jaylw314 Posted September 28, 2019 Author Report Share Posted September 28, 2019 Aaaaand, they found a second hole in the tailpipe next to the flange after they removed it. I forgot to get pictures of that, though. The shop cautioned me the muffler was probably on its last legs too. No holes yet, but he said the whole exhaust system looks to be on its last legs. We had to replace one of the exhaust downpipes last year, so he suspected I'd have to be replacing the other components within the next year or two. They were probably the original exhaust components from the factory 35 years ago. While I could probably replace the downpipes on condition, I figured the muffler wasn't something I'd want to mess around with CO problems. If I was going to get a new muffler, I figured I may as well get a new tailpipe instead of trying to repair it. Interestingly, my IA discouraged me from the Powerflow exhaust, he said he has yet to see a setup yet where he has seen any significant increase in power, so he didn't believe it was worth the cost. He said he thought the tailpipe was about $450 new and the muffler was about $800 new so I gave him the OK on that. Quote Link to comment Share on other sites More sharing options...
N201MKTurbo Posted September 28, 2019 Report Share Posted September 28, 2019 For $450 I would buy new also. Fixing it would cost that much anyway. 1 Quote Link to comment Share on other sites More sharing options...
ArtVandelay Posted September 28, 2019 Report Share Posted September 28, 2019 $800 new? I’d like to know where you can find that deal for future reference.Tom Quote Link to comment Share on other sites More sharing options...
Immelman Posted September 28, 2019 Report Share Posted September 28, 2019 (edited) Give Knisley welding a call. They (legally) repaired my tailpipe. It came back looking brand new.. which for the most part it was. I don't remember the exact price but it was less than what you're talking. Edited September 28, 2019 by Immelman 3 Quote Link to comment Share on other sites More sharing options...
jaylw314 Posted September 28, 2019 Author Report Share Posted September 28, 2019 12 hours ago, ArtVandelay said: $800 new? I’d like to know where you can find that deal for future reference. Tom https://www.aircraftspruce.com/catalog/eppages/awiexhaustmooney.php?clickkey=28608 Quote Link to comment Share on other sites More sharing options...
ArtVandelay Posted September 28, 2019 Report Share Posted September 28, 2019 https://www.aircraftspruce.com/catalog/eppages/awiexhaustmooney.php?clickkey=28608 With the tailpipe part, it’s around $1250.Tom Quote Link to comment Share on other sites More sharing options...
DXB Posted September 30, 2019 Report Share Posted September 30, 2019 On 9/27/2019 at 2:21 PM, jaylw314 said: Crud. The shop was doubtful this could be repaired. How much will this set me back? That looks like the Knisley exhaust? I think the rest have a straight tail pipe. My 22 year old exhaust with ~2500hrs on it had the tail pipe disintegrate last year in similar fashion - I think the new part was about 400 from Knisley. Given the age of the exhaust and the failure of a component, I decided to replace it entirely at annual later this year so I don't find myself puffing on CO or blowing exhaust from a riser one day soon. However, I'm not sure what the best maintenance philosophy is for old exhausts (i.e. repair incrementally or replace based on some combination of age, use, condition). Quote Link to comment Share on other sites More sharing options...
Yetti Posted September 30, 2019 Report Share Posted September 30, 2019 It was $400 ish from these guys a couple years ago. And it was mandrel bent not welded. https://www.aircraftexhaust.com/ Quote Link to comment Share on other sites More sharing options...
jaylw314 Posted September 30, 2019 Author Report Share Posted September 30, 2019 2 hours ago, DXB said: That looks like the Knisley exhaust? I think the rest have a straight tail pipe. My 22 year old exhaust with ~2500hrs on it had the tail pipe disintegrate last year in similar fashion - I think the new part was about 400 from Knisley. Given the age of the exhaust and the failure of a component, I decided to replace it entirely at annual later this year so I don't find myself puffing on CO or blowing exhaust from a riser one day soon. However, I'm not sure what the best maintenance philosophy is for old exhausts (i.e. repair incrementally or replace based on some combination of age, use, condition). I ended up going with new. I was offered a serviceable used exhaust over the weekend, but my shop had already ordered the two parts on Friday and the shipped this morning, so bad timing. On the other hand, with new I won't have to worry about replacing it again as long as I own the plane. 1 Quote Link to comment Share on other sites More sharing options...
kortopates Posted September 30, 2019 Report Share Posted September 30, 2019 3 hours ago, jaylw314 said: I ended up going with new. I was offered a serviceable used exhaust over the weekend, but my shop had already ordered the two parts on Friday and the shipped this morning, so bad timing. On the other hand, with new I won't have to worry about replacing it again as long as I own the plane. So you hope, but the new exhaust could just as easily crack at a joint or the flange just as easily as an old exhaust could. But we hope not! 1 Quote Link to comment Share on other sites More sharing options...
jaylw314 Posted September 30, 2019 Author Report Share Posted September 30, 2019 Just now, kortopates said: So you hope, but the new exhaust could just as easily crack at a joint or the flange just as easily as an old exhaust could. But we hope not! <groan> Thanks for bursting my bubble Quote Link to comment Share on other sites More sharing options...
Guest Posted September 30, 2019 Report Share Posted September 30, 2019 It’s highly unlikely that your new tail pipe will fail anytime soon. Your old one displays classic thinning on the inside radius leading to eventual failure. Clarence Quote Link to comment Share on other sites More sharing options...
geoffb Posted September 30, 2019 Report Share Posted September 30, 2019 Just went through the same thing. AWI turned mine around in 3 days. 1 Quote Link to comment Share on other sites More sharing options...
WilliamR Posted October 1, 2019 Report Share Posted October 1, 2019 Btw, my recent turnaround time with dawley was not great. Took them 10 days to look at the exhaust. Then was told it would be a month before they could get it back to me. After telling them to ship it elsewhere for repair, I got it about a week later nicely repaired. smh William Quote Link to comment Share on other sites More sharing options...
bradp Posted October 1, 2019 Report Share Posted October 1, 2019 Replaced my muffler two annuals ago. @AGL Aviation found a good price but I can’t remember the supplier 1 Quote Link to comment Share on other sites More sharing options...
AGL Aviation Posted October 1, 2019 Report Share Posted October 1, 2019 Replaced my muffler two annuals ago. [mention=14357]AGL Aviation[/mention] found a good price but I can’t remember the supplier You could try Aerospace Welding (AWI). We typically use them or Dawley Sent from my iPhone using Tapatalk Pro 2 1 Quote Link to comment Share on other sites More sharing options...
jaylw314 Posted October 1, 2019 Author Report Share Posted October 1, 2019 AWI actually produces the parts that Aircraft Spruce sells on their website... Quote Link to comment Share on other sites More sharing options...
AGL Aviation Posted October 1, 2019 Report Share Posted October 1, 2019 AWI actually produces the parts that Aircraft Spruce sells on their website... Yes, they do. You’re likely to get what you need for a lesser cost. Sent from my iPhone using Tapatalk Pro 1 Quote Link to comment Share on other sites More sharing options...
N9434V Posted October 1, 2019 Report Share Posted October 1, 2019 I just had my Muffler and Risers overhauled by AWI. The turn around was quick, they received my exhaust on a Wednesday and shipped it back the following Monday. All for a price less than worst case scenario quoted. Very pleased with their service. 2 Quote Link to comment Share on other sites More sharing options...
carusoam Posted October 2, 2019 Report Share Posted October 2, 2019 pseudo summary.... 1) AWI aerospace welding inc... 2) Knisely... 3) Dawley... 4) PowerFlow... OH of muffler systems... often comes completely rebuilt with nothing left of the old system... a technicality that seems to work... Thinning of tubes that far from the exhaust valve is a strong sign that things upstream have some high heat experience as well... This is why inspection of the flame tubes and inner surface of the muffler is so important.... Check on the health of the flame tubes to see they are still there.... in their original shape.... Got a CO monitor with all that? Best regards, -a- Quote Link to comment Share on other sites More sharing options...
thinwing Posted October 2, 2019 Report Share Posted October 2, 2019 On 9/28/2019 at 1:54 PM, Immelman said: Give Knisley welding a call. They (legally) repaired my tailpipe. It came back looking brand new.. which for the most part it was. I don't remember the exact price but it was less than what you're talking. knisely has changed policy...believe it or not it was cheaper to buy new exaust sections from AirPower (lycoming factory)Than the quote I got to repair plus they wanted 3 weeks. Quote Link to comment Share on other sites More sharing options...
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