Old Son Posted September 29, 2019 Report Share Posted September 29, 2019 I bought a cheapo exhaust from eBay for my Eberspacher. As already suggested there is a drain hole in the bottom. I temporarily sealed that to test if there was any other leaks from the unit. There is a leak around both of the tubes at each end that the exhaust pipe would join to. I am proposing to seal these and wondered if I soldered the tubes, would the solder melt when the unit gets hot? Would I be better having them welded? Thanks Link to comment Share on other sites More sharing options...
dmr Posted September 29, 2019 Report Share Posted September 29, 2019 Soft solder melts at a very low temperature. I once had a metal tea-light lantern and the solder melted letting the handle come off and the whole lot fall on the floor. In order of increasing temperature: soft solder silver solder brazing welding ..............Dave Link to comment Share on other sites More sharing options...
Old Son Posted September 29, 2019 Author Report Share Posted September 29, 2019 Sounds like brazing or welding is the way to go. Thanks Link to comment Share on other sites More sharing options...
Nobag Posted September 29, 2019 Report Share Posted September 29, 2019 Use exhaust paste on the joints. Link to comment Share on other sites More sharing options...
ditchcrawler Posted September 29, 2019 Report Share Posted September 29, 2019 Just a wakeup call on what can happen if you get it wrong https://www.bbc.co.uk/news/uk-england-34810360 Link to comment Share on other sites More sharing options...
Chewbacka Posted September 29, 2019 Report Share Posted September 29, 2019 8 minutes ago, Old Son said: Sounds like brazing or welding is the way to go. Thanks If it was cheap and assuming it is stainless it is probably as thick as baking foil which will be very difficult to weld without making big holes. Was it brazed or welded when made? Link to comment Share on other sites More sharing options...
Old Son Posted September 29, 2019 Author Report Share Posted September 29, 2019 The joints in question are pressed into the exhaust box so I cant get any paste around them. I thought braze or weld around the joints then recheck. Just now, Chewbacka said: If it was cheap and assuming it is stainless it is probably as thick as baking foil which will be very difficult to weld without making big holes. Was it brazed or welded when made? It seems to be press fitted around the edges. It we make a hole in it then we'll throw it away. It doesn't feel flimsy but it probably is. Link to comment Share on other sites More sharing options...
Chewbacka Posted September 29, 2019 Report Share Posted September 29, 2019 (edited) 15 minutes ago, Old Son said: The joints in question are pressed into the exhaust box so I cant get any paste around them. I thought braze or weld around the joints then recheck. It seems to be press fitted around the edges. It we make a hole in it then we'll throw it away. It doesn't feel flimsy but it probably is. If it was designed for a truck then it would be used externally to the cab, so apart from noise a few small leak are probably not seen as important but if used on a narrowboat in the engine hole any fumes (poisonous carbon monoxide) released may find their way into the cabin. That could be fatal. Please be careful. If it is just a press fit rather than a crimp and very thin, even if you can seal it up now are you confident the 'repair' will have adequate fatigue life to be safe. Edited September 29, 2019 by Chewbacka Link to comment Share on other sites More sharing options...
ditchcrawler Posted September 29, 2019 Report Share Posted September 29, 2019 23 minutes ago, Chewbacka said: If it was designed for a truck then it would be used externally to the cab, so apart from noise a few small leak are probably not seen as important but if used on a narrowboat in the engine hole any fumes (poisonous carbon monoxide) released may find their way into the cabin. That could be fatal. Please be careful. If it is just a press fit rather than a crimp and very thin, even if you can seal it up now are you confident the 'repair' will have adequate fatigue life to be safe. See my post above Link to comment Share on other sites More sharing options...
David Mack Posted September 29, 2019 Report Share Posted September 29, 2019 41 minutes ago, ditchcrawler said: Just a wakeup call on what can happen if you get it wrong https://www.bbc.co.uk/news/uk-england-34810360 Yup. That case came to my mind too. The BBC article doesn't explain that one of the causes of the deaths was a bodged exhaust system made with soldered plumbing fittings, which melted and came apart from the heat of the generator exhaust gases. So unless you want to kill your girlfriend and her daughter, and get sentenced to 2 years, I suggest you forget the whole idea. Full report at https://www.gov.uk/maib-reports/carbon-monoxide-poisoning-on-motor-cruiser-arniston-with-loss-of-2-lives 1 Link to comment Share on other sites More sharing options...
Alan de Enfield Posted September 29, 2019 Report Share Posted September 29, 2019 Apart from the intention to 'rip-off' rich boat owners, there are other reasons why boat 'stuff' is more expensive than 'equivalents' from other markets. Link to comment Share on other sites More sharing options...
Mad Harold Posted September 29, 2019 Report Share Posted September 29, 2019 It's too dangerous to cut corners with cheap parts on critical systems.I know it hurts but one has to grit ones teeth and buy the correct (probably expensive) parts for the Eberspacher. Link to comment Share on other sites More sharing options...
stegra Posted September 29, 2019 Report Share Posted September 29, 2019 (edited) Not sure why you didn't buy a marine exhaust. My Webasto came from the ebay reconditioner (mp & h, I think) who seems to be well respected on here. It included a sikencer like this: https://www.ebay.co.uk/itm/22MM-MARINE-EXHAUST-SILENCER-MUFFLER-STAINLESS-EBERSPACHER-WEBASTO-DIESEL-HEATER/183762469482?hash=item2ac918c26a:g:7AoAAOSwUMxaGHkR Edit: I see you can get pressed ones for £7.29 on ebay so I guess that's why you bought it. Edited September 29, 2019 by stegra Link to comment Share on other sites More sharing options...
Old Son Posted September 30, 2019 Author Report Share Posted September 30, 2019 I'VE THROWN IT IN THE DUSTBIN!! It probably would not have made much difference anyway 1 Link to comment Share on other sites More sharing options...
Cas446 Posted September 30, 2019 Report Share Posted September 30, 2019 Try here. http://www.mikuniheating.com Then accessories and exhaust systems. Varies sizes of sealed exhausts. Link to comment Share on other sites More sharing options...
Old Son Posted September 30, 2019 Author Report Share Posted September 30, 2019 Thank for the link and all the advice. Link to comment Share on other sites More sharing options...
Alan de Enfield Posted September 30, 2019 Report Share Posted September 30, 2019 14 hours ago, Old Son said: I'VE THROWN IT IN THE DUSTBIN!! It probably would not have made much difference anyway Link to comment Share on other sites More sharing options...
ditchcrawler Posted September 30, 2019 Report Share Posted September 30, 2019 56 minutes ago, Alan de Enfield said: Passed his boat today Link to comment Share on other sites More sharing options...
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