Hmmmm. That might be worth trying. The rubber layer in those diesel mounts, that may be contributing to the fairly common exhaust fatigue problems we see on the inline gas conversations. I wonder if eliminating that rubber would add noise and vibration inside the van? Might be worth experimenting. Maybe when I get off the desert trip I'll try that. On Feb 8, 2014 7:59 AM, "Dennis Haynes" <d23haynes57@hotmail.com> wrote: > One thing I would do is get rid of the rubber mounts on the muffler. They > didn't work for VW. All the Waterboxer have the muffler firmly attached and > moving directly with the engine. One sold assembly. > > Dennis > > > -----Original Message----- > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf > Of Neil N > Sent: Friday, February 07, 2014 3:54 PM > To: vanagon@GERRY.VANAGON.COM > Subject: Re: Exhaust Bushing Inner Weave Premature Failure > > No doubt. I can see that movement even after one tack onto two plates. > > I aligned and mounted the muffler-cat assembly first then built the join > between downpipe and J pipe. On the muffler brackets I made, some of the > holes were enlarged to allow adjustment. This certainly helped the recent > repair done in the muffler shop in Florence. > > The challenging part in making the exhaust, was making accurate marks and > keeping them aligned during fabrication. I would make marks, then remove > cat and downpipe, tack the parts in basement, mount and check fit, repeat > as needed. A real PITA. Welding parts in situ is best but not really > feasible in my case. > > Part of what I attempted to do was use parts that might be found in the > junk yard. (eg total downpipe-cat assembly). This was done to help others > as my WAG is that these parts can be found in good shape and had for a good > price. IIRC, I paid $50 for this near new part: > > > https://lh5.googleusercontent.com/-Q8RL7ZfES7A/Tt1_miL9h3I/AAAAAAAAFb4/SrFznBdv3wg/s1000/Jetta%25202002-2003%2520Downpipe%253Acat.jpg > > assembly before bushing install > > > https://lh4.googleusercontent.com/-2tXy_bqA1SQ/UPYtUkEbT2I/AAAAAAAAGlY/2JwxaYgZm-8/s720/ABA%2520Downpipe%2520To%2520Cat.jpg > > > https://lh6.googleusercontent.com/-xEuPuiwGAWY/UboIAjZB2cI/AAAAAAAAHuI/13iua_Y1m2s/s600/flex%2520pipe%2520install.jpg > > > > > > On 2/7/14, Don Hanson <dhanson928@gmail.com> wrote: > > > Welding something can induce stress and misalignment. I was shown > > this....pretty large movements were apparent as the welder worked. On > > something as long and obviously vulnerable to stress as the exhaust > > systems on in lines seem to be, I'm guessing that it is common to > > screw up the exhaust with careless welding and leave it with welded-in > > stresses that lead to fairly quick cracking in a lot of cases. > -- > Neil n > > Blog: tubaneil.blogspot.ca > > '88 Westy http://tinyurl.com/c8rlw6p > > '81 VanaJetta 2.0 "Jaco" http://tubaneil.googlepages.com/ > > Vanagon VAG *Gas* inline-VR Engine Swap Group: > > http://tinyurl.com/d7gd5ej > |
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