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Old 11-13-2014, 10:12 PM   #1
AU
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Exhaust Manifold Crack potential fire hazard

I had an issue a few days ago with clogged fuel filters on a Cummins 8.3 L engine .That issue was solved , however the mechanic noticed a cracked manifold exhaust pipe . We discussed it and I was told it would probably be fine until I got back home and that it would be a week until they could get to it.

We left and I asked some knowledgeable friends about it. We'll I took a picture and I was about to show to my friend Earl who has worked on Diesel Engines for many years when he mention how hot the pipe got and how under certain conditions one could get extreme heat ( sparks , flames etc ) coming through the crack. If a oil line happened to be close , it could cause a leak in the line and possibly a fire.

I the showed him the picture I took , and guess what. ? Within 2 inches of the crack was a rubber line that had darkened with soot escaping from the crack !

We are on week long trip with 9 other couples . Right now We are hoping to make some type b of heat shield, to use until I can have the part replaced.. I would like to post a picture but My data plan is almost maxed out. It renews In two days so hope to post a picture then .

In the meantime , be sure and take a look at this occasionally. I am not a mechanic and would probably have never noticed this.
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Old 11-13-2014, 10:28 PM   #2
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I recently drove my Endeavor with the 8.9L Cummins on an almost 2000 mile trip to Montana and back with a major exhaust gasket leak. I couldn't hear the high pitched noise it was making and my wife didn't think it was anything "major".

We made it there and back and when I was unhooking my trailer next to the shop the sound bouncing back was loud enough for me to figure out there was a problem.

Long story short, nothing horrible happened. That said, I wouldn't knowingly do it again.
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Old 11-13-2014, 10:29 PM   #3
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A heat shield will likely get you by for awhile.
Hardware stores carry aluminum flashing material in a 10 or 12" width roll. Easy to fashion a shield with this material. Get some baling wire too to hold the shield in place.
Good luck
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Old 11-14-2014, 08:19 AM   #4
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I had more or less the same issue with my Travel Supreme. A Cummins shop noticed a cracked weld at the turbo and I was told the same thing. Problem for me was that the pipe that cracked was a Travel Supreme part and they were out of business. A custom pipe could be manufactured, but since we are full timers, I didn't want take the time and effort to find a shop that could custom make such large pipes.

I traded it in with a former TS dealer who assured me they could fix it - eventually. That's how I got a Monaco.

Final note, a friend of mine actually had a pipe crack and it burned out much of the electrical system as it was right by a main electrical harness. It also burned the hydraulic lines for the leveling system. Insurance covered it but he was out of his coach for 3 weeks.

== John
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