Exhaust leak

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This topic contains 2 replies, has 2 voices, and was last updated by  Conche 3 years, 3 months ago.

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October 31, 2012 at 13:01 #6251
Ronar M
Ronar M
Participant

Hi All,

Ronar has developed an exhaust leak which has covered the inside of part of the engine bay with soot. There is a short flexible length of pipe coming off the manifold, which I replaced a few years ago, but the current trouble is clearly between there and the siphon breaker. The pipe disappears under the port cockpit locker. I have taken the hatch cover from the port wing tank and,with the help of a torch, can just see the pipe heavily wrapped in insulation. I guess I will have to take up the floor of this locker and some of the boxing in which is outboard of it to get at the pipe. Has anyone done this job? Does anyone have any advice about it? I would be very grateful, Cheers, Trevor.

April 25, 2014 at 13:51 #14981
Ronar M
Ronar M
Participant

Hi All,

I got no replies to this but have long ago done the job and thought it a good idea to write it up to help others in the future. I took out the floor of the port side cockpit locker (just a few screws) to reveal the pipe. I removed the pipe between the manifold and the casting where the cooling water is injected (This latter I will call the siphon breaker. It is actually in the after upper port side cockpit locker but the joint with the exhaust pipe is in the lower locker). I then had two fittings made, one to bolt onto the manifold, the other onto the siphon breaker each with a tube which would slip tightly inside a 32mm ‘polylock’ flexible s/s exhaust pipe. The suppliers of the polylock tubing also sold heavy duty jubilee clips to hold everything together. I also bolted some angle aluminium into the base of the locker which would hold the exhaust pipe firmly and support its length. I fixed this aluminium down to bolts which hold on the lid of port side wing tank. The new exhaust was wrapped in fireproof webbing and fixed to the aluminium angle with a standard automotive exhaust clamp. Works perfectly
Trevor
ps when I took the old exhaust off it was full of hard black soot – I could just about get my little finger up the middle – but the old Perkins was working fine!

June 5, 2014 at 21:52 #15111

Conche
Participant

Hi All,

In about 2002 or so, we we thought we had a fire on board as clouds of dense black smoke appeared from the aft cabin. We were motoring at the time.

It turned out that our exhaust pipe was joined by a piece of copper pipe which had corroded through.
We replaced the copper pipe with stainless.
I can’t remember offhand where exactly the join was, but it was in behind or under the aft heads.

It’s worth checking out your exhaust pipe, it may not be continuous.

Rob

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