The exhaust on our Webasto (2000 S) cabin air heater has failed and filled the cabin with fumes.
This heater was installed (by the previous owner) during a major equipment upgrade following a lightning strike back in 2008.
The exhaust ran under the aft cabin bed and exited thru the stern. It's 4 meters long.
The Webasto manual indicates that if the exhaust is longer than 2 meters the silencer should not be fitted. We found a silencer fitted.
The first meter or so was brittle and it split under it's own weight.
We have repaired it and plan to make regular checks and replace the exhaust every 5 years (maximum).
We never run the heater while sleeping at night.
What is the exhaust pipe made of? Is it the stainless steel metal flex pipe that is supplied by Webasto or have they used something else? I have seen stainless exhaust manifolds go brittle at the point where the cooling water enters it. If you tap it, it smashes like glass. If they have changed it, it might pay to get some of the original Webasto exhaust pipe. I have run Webasto systems in my caravan for years and never seen this happen. Fortunately all my exhausts are external which is a bit hard in a boat.
The exhaust was Webasto (stainless steel metal flex pipe) and the replacement exhaust is Webasto.
Leaving the silencer off has made no apparent difference to the sound level.
The Original (by a Webasto agent) installation did not follow their instructions.
The failed Webasto pipe didn't appear overheated and there was no sign of porosity as I've seen with 316 L used on boiler ash hoppers (in Power Stations) where salt water is used to fill the hopper. We had to use 316 Ti and also in high radiant heat area a special Sandvic material.
Maybe Webasto need to stick to Caravan heaters or yachts/power boats away from salt water.
Very unlikely that we are the first (or last) to experience this on a watercraft!!!
Select to expand quoteWarrina III said..
The exhaust was Webasto (stainless steel metal flex pipe) and the replacement exhaust is Webasto.
Leaving the silencer off has made no apparent difference to the sound level.
The Original (by a Webasto agent) installation did not follow their instructions.
The failed Webasto pipe didn't appear overheated and there was no sign of porosity as I've seen with 316 L used on boiler ash hoppers (in Power Stations) where salt water is used to fill the hopper. We had to use 316 Ti and also in high radiant heat area a special Sandvic material.
Maybe Webasto need to stick to Caravan heaters or yachts/power boats away from salt water.
Very unlikely that we are the first (or last) to experience this on a watercraft!!!
Know exactly what you are talking about as we make the erosion shields that they use in the the generators where the fire the coal dust in. We Have the material imported from Germany, can't remember the exact grade, but it is as hard as hell (stuff up our guillotine blades energy job) My boys made me some brackets and accidentally used an of cut. I could not drill it by hand for love nor money.
As you said the only option is to replace it every couple of years. This is certainly good information to people with Webasto heaters.
