During a routine oil change this past weekend, I saw this (not the greatest picture, though):





Both mounting bracket arms on the passenger side of my Leistung secondary cat bypass had literally snapped.


Why would they use such a brittle metal for an "arm" that will obviously be subjected to some flex? Since the purpose of these support arms is to keep the pipe in its correct location, either a heavier gauge or a slightly more flexible piece of steel should have been used. Unbelievable to pay as much as these simple pipes cost and end up with this.


The kludge repair is, of course, JB Weld. We'll see how it holds up.

 

Id send them a picture and see what they say they can do to fix the problem

 

When did you buy these? I believe they have a new version out...mine has adjustable hangers

 

Sorry, JB Weld can do wonders, but you are way outside of its operating temperature on the secondary exhaust pipe. So expect it to fail too in quick succession.

Interesting that the rod broke before the weld. In any event, I would contact the manufacturer, show them the pic and let them address it.

This is why these secondary pipes need two (quality) hangers. Lots of stress there in the system.

 

While I also agree that JB weld isn't going to hold up well in this situation (it doesn't do as well in shear as it does in tension), I don't necessarily know that it will be outside of it's operating temperature in this application. JB weld is good for around 550 F for continuous use and I'm not convinced that this is the case in this application. The part of the exhaust is likely not that hot, but if it was, I really doubt that that part of the hanger would be >550 F due to the heat transfer associated with the boundary condition at the "free" end of the rod.

Also, I'm not surprised at all that it broke away from the weld. The weld will be the strongest part of the pipe. It's the thinner metal (thinner with respect to the thickened area due to the weld bead) in the heat affected zone which will break when subjected to cyclic stress. Again, any time a welded pipe breaks, it won't be at the weld. Rather, it will be near the weld.

Leistung (now Hanksville Hot Rods, hhrproducts.com) does indeed have a new design with much better looking hangers. I'm fairly certain this was a big problem for them in the past, thus their several revisions on the pipes. If they really wanted to make a quality product, they'd heat treat the parts after welding them. This would nearly eliminate any problems associated with fatigue in the heat affected zone of the welds in these pipes.

 

Seeing as we both are from the south, it does make it legal for us to use coat hangers as exhaust hangers...LOL...Good luck on your fix

 

I briefly considered trying duct tape first. JB Weld was the second option and that failing, a heavy gauge coat hanger for sure.

 

Let me put this another way.. I managed to bake off a 1200 deg F coating off a properly prepped exhaust on the secondaries and mid section. Given this, I am adamant that this epoxy will prematurely fail.

 

Interesting. I'd like to put a thermocouple on there to see what the temp really is. You shouldn't be baking off 1200 F paint that far back!

 

Gotta check mine, as I had the secondary pipes replaced too.
I would definitely contact them and tell them what you observed (with a nice photo to backup the info).
From what I remember, you go them recently, which would definitely mean replacement, but the PITA is having to do the replace again. Having access to welder would help for a quick fix. Would not mess with JB weld, etc, as R-man mentioned, it will bake off anyway.

Let us know what comes out of this.

 

Wow that sucks. Take it to any local exhaust shop and throw them a 20 spot to weld another bar on. Simple, fast and cheap.

 

That sucks. I know what brand i won't be buying.

 

I wouldn't buy from Leistung either, but they sold to Hanksville Hot Rods and I did buy from them. Totally different hanger design and great quality product along with excellent customer service. Totally recommend Hank's products.

http://www.ebay.com/itm/Porsche-Caye...da0fb5&vxp=mtr

 

ok. Cool.

 

I have had the same issue happen with the hangers breaking on both of my bypass pipes from them and have had them welded twice, still breaking. I contacted them about the issue and they said they would send me out new pipes with the new design, but it has been over 2 months and no sign of the pipes showing up and no response from them after multiple attempts to contact them. I am upset with their products and customer service.