Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > National RV Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 01-16-2009, 06:45 AM   #1
Join Date: Aug 2006
Posts: 34
Nothing worst than a leak you cannot determine. I have a 2003 DolphinLX with a mysterious roof leak that is ruining my hutch cabinet. Motorhome has a hutch that backs up the bathroom shower. Skylight in shower has been removed and recaulked (several times) so I don't think it is from there. The outside wall in the upper hutch cabinet is damp and slightly wet to the touch. We have had no rain for several days and its still wet ( may be the dew from the morning). When in storage it ruined my shelft and some of the edge but not too bad. I have tried so many things and amnow looking for someone who has had the same problem and how it was resolved. My last hope before I take it in but I hate to give up. Any 2003 Dolphin owners with this problem???

Thanks as always - Always get so much help from here.
Just look at the view - Today is a gift
WimbledonDolphin is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free! RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 01-16-2009, 01:42 PM   #2
Senior Member
Rick 2005 Dolphin 5376's Avatar
National RV Owners Club
Workhorse Chassis Owner
Join Date: Jul 2006
Location: San Jose, Ca.
Posts: 1,334
A leak doesn't have to be where you see wet. It could of originated from almost any other place. Let's say it is leaking at where the front or rear cap is joined to the roof and running down to where you see the leak. understand? I hope I'm making myself clear. I think you need to broaden your search to other areas on the roof.
Rick and Julia
2005 Dolphin 5376, W24, Solid Body Paint, Koni FSD's
Looking for a new toad
Rick 2005 Dolphin 5376 is offline   Reply With Quote
Old 01-17-2009, 03:51 AM   #3
Senior Member
Join Date: Mar 2008
Location: Southampton NJ
Posts: 146
When my Dolphin was new, there was a leak that damaged the inside wall just behind the passenger seat....and under the passenger window. Removed the it. Applied an almost excessive layer of Di-Cor on the roof...seams...whatever. Still the leak.
Dealer mechanic finally thought to replace the rubber strip...where the front cap joins the body. Removing the strip....we found a puddle of water under it.
Replaced the rubber strip...problem solved. Now I gotta figure out what to do with the damaged wall area.
As RICK 2005 almost never know where a leak is coming from. A roof leak is just about as maddening as an intermittent electrical problem!
Good luck!
2001 Dolphin 5330 F-53 Chassis
Toad # 1 :2007 Chevy HHR/auto (4 down)
Toad # 2 :2011 Ford Ranger 4WD/auto (4 down)
jerseyjim is offline   Reply With Quote
Old 01-17-2009, 08:58 AM   #4
Senior Member
National RV Owners Club
Workhorse Chassis Owner
Join Date: Oct 2004
Location: Scottsdale, AZ
Posts: 1,502
Another potential leak source is the satellite radio antennae NRV installs several inches behind the front cap to roof joint. This recently began to leak on mine. Fortunately it leaked into the tv and dripped onto the recess of the dash just below the tv. No damage or stains on the ceiling material. Let the tv dry out before using it and seems fine.

Past and present MHs I've had developed leakage around the roof top AC units. Vibration and gasket shrinkage between the roof surface and the ac unit may require re-tightening of the 4 ac mounting bolts accessible after the filter and bezel are removed.
2003 34' Dolphin 5342, W22, UP, UPGBrake, F and R Track Bars, Rear IPD sway bar, Koni FSDs, Safe-T-Plus, Scan Gauge II.. 2004 Jeep Liberty, Blue-Ox Adventa..
M&EM is offline   Reply With Quote
Old 01-17-2009, 05:58 PM   #5
Senior Member
Join Date: Oct 2005
Posts: 1,224
If it is anything like my Tradewinds the tank vent goes thru the roof in that wall.
bldrbob is offline   Reply With Quote
Old 02-02-2009, 08:59 AM   #6
Junior Member
Join Date: Feb 2009
Location: So.Cal
Posts: 5
I hope this helps, my 04 Dolphin LX has an issue in the same wall. Thought it was a water line or a shower drain issue, but It turned out to be the shower skylight, the white butyl rubber caulk used on National products will seperate and tear with movement of the coach. It has a low tolerance for shear and will split with movement of the coach, much like silicone. The skylight is large and appears to be located at a stress point in the house/chassis. It looks fine when you inspect it, but it may still have a tear. It will tear again a few months after caulk is reapplied and completely cures. I left the skylight installed, removed all of the existing caulk on the surface of the roof and skylight, cleaned the area well, and applied a 4" wide butyl tape over the skylight seams on a warm sunny day. It gets very sticky when it is hot. Problem solved, at leat so far and the tape looks a lot better then a blob of caulk. I would rule out other sources and go back on the roof. perhaps a quailfied repair facility will have a non invasive tool that can detect a water leak and follow the trail to it's source. Good luck.
dsymms is offline   Reply With Quote
Old 02-04-2009, 07:14 PM   #7
Senior Member
RV 4 2's Avatar
Join Date: Oct 2006
Location: Fullerton, CA
Posts: 368
We had a mystery leak also. Whenever it would rain or even when it very damp at night where the dew would puddle on the roof of the MH, water would puddle in the plastic trim piece under the front TV/stereo cabinets above the dashboard. We would not know there was water there until we would make a turn and all that water would run out the side and down the mounting area where the fans are. And it got REALLY bad. Every time I would try to find the leak by pulling access panels in the side cabinets or from the front cabinets,I would not be able to find anything wet. So when I had time I got up on the roof and checked all the places where water could flow through and I found that NRV did not seal the front cap to roof well at the upper left front corner. When they built the coach, they did not use that Eternabond roof tape all the way to the edges of the roof. They stopped the tape 6-8 inches back and the caulked the remaining seam out to the side wall. Once I saw that, I removed all the caulk and redid the seal making sure it filled all the gaps. No leaks since.
I am happy it is fixed but it was a PITA to find. So good luck with your quest to find the leak.
Mike and Linda
2 little doges Lola and Tilly
2008 National Dolphin DX35Ci, 2007 Saturn VUE
RV 4 2 is offline   Reply With Quote
Old 02-04-2009, 08:28 PM   #8
Senior Member
Belgian's Avatar
National RV Owners Club
Join Date: Jun 2006
Location: Manhattan Beach, CA
Posts: 695
There was a recent post somewhere or on about a system that will pressurize the iside of the MH with air. There is a large blower motor connected to one of the ceiling vents to pull in outside air. With all the window & doors closed the inside pressure rises. Then you soap down the outside of the MH, the roof in your case, and look for bubbles. Very simple idea that I'm sure works very well. Now where do you find a company that does this type of work I don't know, maybe the local RV repair shop could send you in the right direction.
Do a search here and at also.

just found the post on Do a search for Seal Tech 430R

Also check out
Steve & Jeri
2004 Dolphin 5342
2000 Jeep Cherokee 4X4
Belgian is offline   Reply With Quote
Old 02-04-2009, 10:06 PM   #9
Senior Member
DAN L's Avatar
Winnebago Owners Club
Workhorse Chassis Owner
Join Date: Sep 2007
Posts: 2,974
i have read that some folks use their dash heater blower set on fresh air supplemented by a shop vacuum with a window adapter set to blow to pressurize the interior of the moho.
then, use soapy water to find where the leak is.
01 WINNEBAGO 35U W20.8.1L 5sp allison SW Wa,. Good Sam, SKP. RVM 198 AMSOIL fluids. BANKS ecm program. SCAN GAUGE II w/ Ally temp. 2 LIFELINE GPL-6CT AGM Batts on their sides. Michelins, TST tptts. K&N panel air filter. AERO mufflers. TAYLOR plug wires. ULTRA POWER track bar. KONI fsd shocks, toad '21MB GLA FWD on dolly
DAN L is offline   Reply With Quote
Old 02-05-2009, 06:45 AM   #10
Senior Member
Workhorse Chassis Owner
Join Date: Feb 2005
Location: western wa.
Posts: 560
some camp world location can do the preasure thing. cost i think is under$100.
2018 Jayco redhawk E 22
chevrolet express 4500 chassis
cannon man is offline   Reply With Quote
Old 02-05-2009, 07:01 AM   #11
Senior Member
two2go's Avatar
Join Date: Dec 2007
Location: Parker, CO
Posts: 1,056
While getting info from a NRV technician about removing my TVs, he also advised me to put Eternabond tape on the front and rear cap to roof seams. You can tell my coach by the white "racing stripes" on each end coming down to the gutter.
2017 Coachmen Orion, Ford Transit 3.7L: previous
'09 Pleasure Way Lexor, '05 NRV Dolphin 5342
two2go is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Exhaust Manifold Leak and Charge Cooler Leak Test gandl2 Alpine Coach Owner's Forum 7 03-19-2008 09:05 PM
mysterious odor...sometimes Carnles Winnebago Industries Owner's Forum 9 10-08-2007 02:58 PM
Mysterious Romex from ceiling DavidLyle Winnebago Industries Owner's Forum 2 05-07-2007 04:07 PM
Slide leak & post leak (I hope) pictures John_Canfield Winnebago Industries Owner's Forum 6 12-07-2005 11:23 AM
Mysterious rattle Moving on Winnebago Industries Owner's Forum 9 11-18-2005 06:08 AM

» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 10:04 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.