Class C Water Leak

Hmmm you folks have given me some good ideas and certainly "food for thought" in regards to the leak problem. I will wait and see what happens on the way to Myrtle Beach, but a leak is still a leak and I will have to do something when I get back.
Thanks again to all for the suggestions.
Also there are no windows in my overhead area but there are lights and caulking etc.
I will see what happens in the future

Gil

I ordered my 'C' new from a local dealer. During the initial walk through, they told me that before I could drive it off the lot, they would be caulking around the running lights on the cabover. He told me that the factory installs the trim rings with a power screwdriver, and that sometimes causes cracks to form under the trim rings. I've had it for 10 years, and no leaks.

GilONel wrote:
I pulled my Class C ( 2008 Jayco Greyhawk 31SS) out of the driveway yesterday (Sept 14th) to take it over to the mechanic for its final check before we head to Pigeon Forge Tennessee.
Anyways to the point.
My RV sits slightly downwards and when I pulled out I was christened with an amount of water inside the Rv. This was disconcerting as I looked around on the roof and at the front nose cone (or whatever you call it) and there were no obvious cracks in the caulking.

The water flowed from the front inside the nose cone over the area where the bed is right above my head. Any ideas on how to find this leak or what to do. We had just finished a downpour for a few hours the day before. ....

Thanks for any ideas and help.Gil

If you have side windows in the cab over the water is coming from the windows because the weep holes in the frame are plugged.

With a heavy rain the window track fills up and leaks inside if the weep hole is plugged up. AC condensation draining over the RV side will also cause the same leaking if weep holes are plugged.

Check the weep holes and clean them out.

The fast way is to perform (or have somebody perform) a Pressure Test. The better RV shops have an (albeit expensive) machine (variant on furnace blower) that creates a little positive pressure inside a closed RV. Then you (or tech) goes over the outside with bubble solution in a spray bottle. Just like testing a tire for a nail, but much lower pressure. Nice thing is, the bubbles show the SOURCE of the water, not where it may appear inside.
That said, a good RV tech knows where and how to look, and generally will find the source.
Naturally you can go on your own hunt and if the source is readily visible, clean the area, remove loose sealant and apply non-leveling Dicor Sealant. Please DO NOT USE SILICONE products. They don't hold well and leave a residue that nothing will stick to after.
Inspection and re-sealing are annual requirements under warranty for new coaches. We all need to do it. RV's are subject to heating, cooling, flexing, sunlight and freezing. All of those compromise the seams.

We had a problem that apparently came from the Air Coditioning. This had been screwed down too tight (when???) and the moisture was not draining onto the roof. It first showed are water dripping from the A/C into the unit. It was also going into the roof space.
We later found that it had got inside and the over cab bunk cushions developed mold and we had to have the floor there replaced.

Mine had a minor leak that was caused by shrinkage of the rubber moulding around the cab over window. Some 3M windshield sealer fixed the problem.

I don't have a class C but have read enough on here to know that leaks are commonly found around the front running lights, assuming you have them. Another culprit is the front window, if you have one.