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Old 03-07-2007, 03:23 AM   #1
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If my fuel tank is anywhere near full, gas leaks out both filler compartments. I'm at Newmar now, wondering if anyone else has had this happen and what the fix was.
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Old 03-07-2007, 03:23 AM   #2
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If my fuel tank is anywhere near full, gas leaks out both filler compartments. I'm at Newmar now, wondering if anyone else has had this happen and what the fix was.
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Old 03-07-2007, 03:34 AM   #3
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I have not had that problem, and I have filled the tank to the max.

I wonder if that would happen if the tank was filled to the max in very cold weather, and then the temperature went up considerably?
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Old 03-07-2007, 03:44 AM   #4
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I think it is more from sloshing around vs. pressure.
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Old 03-07-2007, 04:37 AM   #5
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Had same problem Newmar changed the caps to unvented problem solved.
When you remove cap do slowly to let the pressure [vaccum] release.
No move diesel running down the side of MH
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Old 03-07-2007, 05:06 AM   #6
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Just checked mine. They are unvented.
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Old 03-07-2007, 05:36 AM   #7
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The expansion of the fuel from cold to warm should not affect or cause spill as the top of the tank has a trapped air space to take care of it. Scott, it might be a great time to replace your caps with locking type available at any automotive supply house. They are non vented on your coach.

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Old 03-07-2007, 06:37 AM   #8
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Ours are unvented factory provided caps but they also leak(not a lot but just enough to be an irritant).
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Old 03-07-2007, 11:40 AM   #9
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I have also noticed a tiny bit of diesel leaking past the caps and a small runner making it part-way down the outside of the coach. This happens even if I've been very, very careful to wipe up every little bit of diesel in sight after a fill-up. It's irritating. I would love to know how to stop it.
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Old 03-07-2007, 01:00 PM   #10
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Happens on the passenger side of our unit. Usually after a couple of sharp left turns or when on curvey mountain roads.
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Old 03-08-2007, 04:14 AM   #11
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javajelly I have the same problem on a 04 dutch star. After tighten with the finger control if you will hold the outer edge of the cap and hold it tightly you should be able to turn it about 1/4 turn. For me it stops the leaking.
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Old 03-08-2007, 09:42 AM   #12
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aubie, just tried your suggestion and was able to get 1/4 turn. Let you know how it works, thanks, Dave
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Old 03-08-2007, 10:06 AM   #13
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aubie,

Good idea. I'm going to give it a try, also. Thanks.
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Old 03-08-2007, 10:50 AM   #14
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Had to work on the gas caps. Had them put non-vented on. However, still leaked. So I tried pushing and turning at the same time and got another 1/4 turn as someone else had written. By pushing, the resistance seems to be greater on the overtightening mechanism.

Hopefully this is the answer.
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