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by
David Pascoe |
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| From
Article
Exhaust
Risers
Page Two
Photos by David H. Pascoe,
Marine Surveyor
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Here's a
picture that would make any surveyor's blood run
cold. This cast aluminum riser is guaranteed to
wreck this engine when it fails, as it inevitably
must. In addition, combined with engine vibration,
that long lever arm (pipe between aluminum riser
and manifold) is bound to break the mount or pipe.
The insulation on the down side indicates that the
exhaust hose is getting too hot, so they wrapped
it with insulation!!! |
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Iron riser
for the non turbocharged Cat 3208. Here the very
small water passage holes became completely blocked
within just a few years. Riser failure here wrecked
the engine.. |
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The latest
diesel riser designs utilize this non-cooled section
(black arrow) between the water induction section
(white arrow) This precludes the possibility of
riser failure resulting in water going into the
turbo. Detroit Diesel 8V92 |
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Large diesel
induction elbow. This one is 5 feet long. In this
photo, the top of the pipe is at 2 o'clock, the
bottom at 8 o'clock where all the rust stains are.
There should not be any rust stains on the inside,
which means that there are leaks. These
leaks all came from weld joints, all of which were
repaired and this riser was put back in service. |
Go to Article
Exhaust
Risers Photos : Page One
First posted October 23, 1998 at
www.yachtsurvey.com.
Posted January 24, 1999
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