Tweet
Hi guys,
I need some advice. My left exhaust pipe has cracked in the exact same place 3x now which has got me scratching my head. The first time I reasoned that it was the result of the cylinder issue that occurred 14 months ago. However we did another repair on it a few months ago with reinforcing, and it has now cracked again after only 30 hours. The welding was done by a professional aircraft welder and each time it has cracked beside the weld. It's occurring on the aft plate of the heat muff where the pipe attaches. I can think of a few reasons why it might happen, but I'm very interested in "crowd sourcing" potential causes and fixes from the group. One possibility is that I have added a short section of turned down exhaust tips on recently, although the first cracking occurred before this change. I'm now starting to wonder if it's more to do with the engine movement on the mounts during starting and power applications. It's currently supported from the engine mount so I might see if it can be supported by the engine itself instead. Any ideas appreciated.
IMG_1466.jpg
IMG_3026.jpg
The photo below is of the righthand exhaust, but the mounting and attachment is in the same place.
IMG_3027.jpg
The photo below was taken during the build and shows the universal joints.
IMG_3025.jpg
I need some advice. My left exhaust pipe has cracked in the exact same place 3x now which has got me scratching my head. The first time I reasoned that it was the result of the cylinder issue that occurred 14 months ago. However we did another repair on it a few months ago with reinforcing, and it has now cracked again after only 30 hours. The welding was done by a professional aircraft welder and each time it has cracked beside the weld. It's occurring on the aft plate of the heat muff where the pipe attaches. I can think of a few reasons why it might happen, but I'm very interested in "crowd sourcing" potential causes and fixes from the group. One possibility is that I have added a short section of turned down exhaust tips on recently, although the first cracking occurred before this change. I'm now starting to wonder if it's more to do with the engine movement on the mounts during starting and power applications. It's currently supported from the engine mount so I might see if it can be supported by the engine itself instead. Any ideas appreciated.
IMG_1466.jpg
IMG_3026.jpg
The photo below is of the righthand exhaust, but the mounting and attachment is in the same place.
IMG_3027.jpg
The photo below was taken during the build and shows the universal joints.
IMG_3025.jpg
Comment