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Old 06-10-2013, 11:00 AM   #1
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Diesel Fumes

Has anyone had any issues with Diesel exhaust fumes from their coach engine entering the coach? On the last couple of trips I could detect an odor in the rear of the coach, not severe by any means but it was there.

I have in the past traveled with the bathroom roof vent opened a bit but on our most recent trip closed all roof vents and it seemed to cure the problem. Does that make sense that fumes could come in through the vents?
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Old 06-10-2013, 11:10 AM   #2
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Nope

Definately not normal. Assuming from your nickname you have an Expedition my guess would be that you have a bad access seal in the bedroom. There may be more than one panel.

Another possibility is a leaking exhaust system.
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Old 06-10-2013, 12:10 PM   #3
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When you crack your bathroom vent, and the coach is running down the road, you create significant negative pressure inside the coach. The negative pressure will pull air in from any available source, the bedroom access panels are likely the easiest. That will also pull in fumes and engine smell along with it.

Close all roof vents when the coach is in motion.

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Old 06-10-2013, 06:16 PM   #4
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I have given the exhaust the once over and cannot find anything that looks/sounds like a leak. The access panel in the bedroom appeared to be ok a few months back when I changed out the fuel filter.
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Old 06-11-2013, 04:00 AM   #5
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You seem to have solved the problem by leaving the roof vents closed while traveling.
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Old 06-16-2013, 06:28 PM   #6
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The source of the exhaust fumes has been found, a hole in the pipe going into the muffler. The coach is an 2005. Doesn't it seem a bit premature to have exhaust problems?
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Old 06-16-2013, 08:05 PM   #7
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2005?

Probably built in 2004, so 9 years old or so. If it was kept in a salty environment or driven in slushy salty conditions it would rust quicker.

My friend bought a used Dutch Star from coastal Florida. It was a 2000 or newer and a rust bucket underneath. He replaced the exhaust and quite a bit of sheet metal around the engine. Spent a lot of money. He just got rid of it and went to a 5th wheel mainly because his wife didn't like the MH.
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