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Old 04-08-2015, 06:25 AM   #1
Seasoned Camper
Join Date: Oct 2010
Location: Wichita
Posts: 84
M.O.C. #10846
Slide Out Seals

I need to replace some slide out seals on our 2011 Montana, both the wiper seal (we have the double, an inner seal and an outer seal) and the ones on the perimeter of the box (do not know the proper name for these). When our Montana was new and for a period of time, I would clean all the seals and then apply 303. At one of the rally seminarís, someone said all that was required on the seals was just to keep them clean. Had I continued to apply the 303, the heat and weathering may not have affected them as much. So my question is: what is involved in replacing these seals? Has anyone done this before? Do you recommend taking the rig into a dealer?
Larry and Sandy
2015 GMC Denali and 2011 Montana 3400RL

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Old 04-08-2015, 06:32 AM   #2
Montana Master
Join Date: Feb 2005
Location: Haysville
Posts: 3,920
M.O.C. #3085
Larry ... the perimeter seals are bulb seals. They slide out a groove that they are held in. Sometimes the ends of the groove are pinched down to hold them in place, so you have to pry open the groove to get them to slide out. You can buy the bulb seals in bulk and cut them to length as needed. I've never messed with the flap seals on the sides and top. I think they are like automoive seals and snap onto a lip around the opening.
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Old 04-08-2015, 07:25 AM   #3
Montana Master
Join Date: Feb 2012
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M.O.C. #12156
Using 303 or similar products is a smart PM practice.
Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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Old 04-08-2015, 05:43 PM   #4
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Location: Mesa az
Posts: 2,047
M.O.C. #5651
My 2006 Montana seals had a screw thru the seal at the end to hold it in place. And it was from the inside!! And back then there was only an outside seal. Took me a while to find the screw. Real easy to replace after that.
I had the dealer sell me (special order) a 50 foot roll of the stuff and still have about 10-15 feet left. Don't know if it fits the new 5er tho.

Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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Old 04-09-2015, 01:40 AM   #5
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Location: Hanover
Posts: 1,458
M.O.C. #13325
Someone posted about using mineral oil on them last year. Since I had a five gallon bucket of it that's 3/4 full sitting in my garage, I tried it out when de-winerizing a few weeks ago. Did a really great job of taking off the black marks on slide sides. Lubricates them and the seals as well. Think I paid about $30 for the bucket at a tack store - it's used on horses. I use it for woodturning wet wood, but got the big bucket since it was cheaper than a one gallon. At least now I've another use for it.
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