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Old 05-05-2013, 01:19 PM   #1
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White stuff on my bike towed behind the MH

Hi all, just returned from a weekend trip with our Itasca Meridian 36M (Diesel pusher). We usually two our Jeep but on this trip we had our bike on a bike rack behind us. Just discovered a thick layer of white dust like stuff on the bike and rack.
We never had this on the Jeep.
Do you think this is dust or diesel smoke. This is a new (2013) model.
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Old 05-05-2013, 01:59 PM   #2
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I don't know, but I think if it was from diesel exhaust, it would be somewhat greasy. I carry bicycles also and have never had that, but my exhaust pipe exits to the side. Let us know what you find out.
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Old 05-05-2013, 02:09 PM   #3
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The exhaust pipe is going vertical up toward roof but the engine grill is right behind th MH.
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Old 05-07-2013, 05:24 AM   #4
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Hi all, anyideas?
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Old 05-07-2013, 09:10 AM   #5
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I've never heard of a diesel spitting out a white dust. I would say its just dust from your travels. As your rolling down the road the air will swirl and vortex around the back of the motorhome because you're essentially a giant brick being pushed through the air. This will cause dead spots of air where debris and dust can collect on surfaces in the rear. When towing your jeep you don't have those vortecies or swirls because your jeep is "drafting" you.
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Old 05-07-2013, 12:05 PM   #6
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Quote:
Originally Posted by Elexwiz View Post
I've never heard of a diesel spitting out a white dust. I would say its just dust from your travels. As your rolling down the road the air will swirl and vortex around the back of the motorhome because you're essentially a giant brick being pushed through the air. This will cause dead spots of air where debris and dust can collect on surfaces in the rear. When towing your jeep you don't have those vortecies or swirls because your jeep is "drafting" you.
This make a lot of sense. Thank you.
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Old 05-07-2013, 12:53 PM   #7
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Do you remember driving over any highways that were in the process of being refurbished. The machine that grinds up the pavement leaves a white dust in the grooves left behind. The air vortex behind your motorhome would pick this up and voila! white dust on your bike. You would remember. The road surface looks like a washboard with cross hatched grooves in it. Just a thought....
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Old 05-07-2013, 01:18 PM   #8
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Do you remember driving over any highways that were in the process of being refurbished. The machine that grinds up the pavement leaves a white dust in the grooves left behind. The air vortex behind your motorhome would pick this up and voila! white dust on your bike. You would remember. The road surface looks like a washboard with cross hatched groves in it. Just a thought....
Great point. I never considered recent road work. Maybe from new rumble strips as well.
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Old 05-07-2013, 04:15 PM   #9
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The fact that nothing gets on the Jeep tells me the issue must be what you are describing. It is weird dust that covers every inch of the bike and the rack. They were both white/gray. I have not had opportunity to wash either yet.

I will keep my eye on this and will elaborate. Thanks again to all.
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Old 05-07-2013, 05:34 PM   #10
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Did it snow? lol
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Old 05-07-2013, 06:08 PM   #11
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Soot from all the fires in CA? LOL
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Old 05-08-2013, 07:23 AM   #12
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old road salt?
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Old 05-10-2013, 06:29 AM   #13
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All, thanks for your good input. I finally got around cleaning the bike and it seems like it was dust or road salt. It cleaned easy so cant be diesel grease. I also when to storage and looked at the bike rack which is still on the MH. As rained last few days in VA the rack is almost cleaned also.
Seems like this Mistry is solved....many to go for us new MH owners.
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Old 05-10-2013, 09:30 AM   #14
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When they grind the highways it leaves dust/residue in the grooves left by the grinding machine. Also when they cut the expansion cuts with a saw it leaves a paste behind that dries to a dust. It's just dust and won't stick to anything . I worked building freeway bridges and always had that on the sides of my work truck. It washes off easily.
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