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| chipenter:
My Volvo XC70 had 65mm exhaust maybe other T5s had the same size . |
| awemawson:
3 metre length of 2 1/2" BSP gas barrel is a mere £89 delivered :bugeye: (Hence going to re-use the flexible pipe !) At lunchtime the 100 mm length of 36 mm Brass Hexagonal arrived, so I was able to get on and make a heater housing as one solid integrated part so (hopefully) no more leaks. A fairly straightforwards bit of machining but by heck those brass bits go everywhere ! The first heater element that I fitted was subjected to engine coolant approaching it from the 'lead' end and this had degraded the magnesium oxide insulation causing my RCD to trip. Apparently magnesium oxide is hydroscopic. I had tried initially heating it from a 24 v DC source (so only 20 watts, it's rated at 200 watts) to try and drive off the moisture, and initially this was promising, then the leakage got much greater. As an experiment I put it in a box of silica gel over night and it's leakage resistance was up to a meg-ohm or so in the morning, so I left it connected to the 24 volt DC supply over night, and now I cannot detect any leakage at all :clap: |
| PekkaNF:
Hygroscopic insulation material on water heater. Argh. That one piece heater pocket should do it pretty well. Looks the business very much. |
| awemawson:
MICC (or Pyrotenax ) uses the same magnesium oxide insulation - in fact it was in some installation instructions for Pyrotenax that I read that the cable ends need to be heated with a blowlamp before conducting insulation tests for this very reason ! |
| mc:
Commercial vehicle spares supplier is what you probably wanted for exhaust bits, although 2 1/2" isn't that big, but car suppliers aren't likely to supply individual pipes/bends. Trucks often have non-standard exhaust systems, so commercial suppliers are far more used to sourcing individual bits. There are also a few custom exhaust companies around, which often aren't that expensive. We used to get custom stacks for lorries for under £300, which involved a few 45 deg bends to get from the silencer and past the gearbox, while avoiding a cross member, and various pipes, before the final 2 1/2m vertical stack. |
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