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Old 09-01-2013, 08:48 AM   #1
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1987 32' Excella
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Wheel well leak

Several months ago I discovered that I had a water pump leak and I replaced the water pump which is located under the wardrobe just behind the wheel well. At that time I also installed a moisture alarm right beside the pump; the alarm was placed in position with double-sided tape. Last weekend we drove back to Ottawa from Toronto in a driving rainstorm for the entire 5 hour trip and the moisture alarm went off. When I got back home I emptied out the wardrobe, flipped up the floor and detected that the water came in just where the wheel well is attached (at the rear) to the outside wall. Obviously this was from the spray from the tires running on wet pavement. The next day, after things had dried out a bit, I looked under the wheel well, and by running my hand along the edge of the wheel well where it attached to the outer wall, I found a gap in the plastic, and was able to actually put a finger in and feel the fiberglass insulation.

I took some silicone-based caulking tape and layered it so that I could cover the gap, then I cut some foil from the bottom of an aluminum take-out dish and pressed that over it with Vulkem to seal the edges. I know that this is just a temporary fix until I get to JC for my scheduled service in November, but I would like to know what the permanent fix for this is.

I should add that the wood floor is not soft, and that there is no deterioration (thankfully), so this was caught early. When I get to JC and they remove all the wheels to repack my bearings and check the brakes (my usual twice yearly service), I will have them thoroughly check the wheel wells and make sure that all those seams are properly sealed.
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Old 09-01-2013, 09:15 AM   #2
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1981 31' Excella II
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As long as your patch is not leaking, it should be as permanent as anything. You could replace the wheel wells but eventually they are going to leak as well. Was this a place where the tire rubbed a hole in it or where the flange meets the floor? You can fill rather large gaps with the Trempro-635 material or similar stuff.

Perry
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Old 09-01-2013, 07:19 PM   #3
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Until I drive in rain again I won't know if the patch is leaking. It is not near the tires at all, but where the outside part of the well meets with the outside wall. I'll try to take a picture of the location and post it - it will be the photo of the patch, as I've loaded all the clothes etc into the triple wardrobe.
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Old 09-01-2013, 08:40 PM   #4
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You should be able to test it with a garden hose with a spray nozzle on it. Just spray under the wheel well in the same manner as the water would be thrown by the tire.
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Old 09-02-2013, 02:13 PM   #5
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Good idea, I'll do that. Meanwhile here is the picture I took of the leak area.
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Old 09-02-2013, 05:36 PM   #6
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Looks like you have a pretty good temporary patch. I would try something like fiberglass as a more permanant fix. I would see it if fiberglass will stick to it. Experiment first and see what sticks the best.

Perry
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Old 09-02-2013, 08:41 PM   #7
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Perry, I just need it to stick until November 21st - that's when I have my service appointment at JC and I'll have both wheel wells thoroughly checked and any possible leaks fixed permanently. I always have my bearings packed and brakes checked on the way south for the winter, and anything else that is needed gets done at the same time.
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