water leaking w900

Mine is leaking in almost the exact same spot. Just got this 2011 truck about 6 months ago. We just went through our first heavy rain and all the sudden water is pouring into the cab on the passenger side between the passenger seat and the cabinet. It's a significant amount of water too. Second time this has happened since owning this truck.

I've owned KWs, Petes, Freightliners and never had this problem. It seems like this new T700 is not the same quality as Paccar's trucks have been in the past. Everything seems to be made of cheap plastic and not very well built.

We have looked around but can't find where the water in coming into the cab, or I should say we can't find where the leak begins.

 

That main seal between cab and sleeper is bad for that, also like you said the vista window seals can leak too. What I do is try get some vanguard caulk in under there, enough to make a dam so the water will go elsewhere. Saw a KW mechanic deal with this one day. He put a hose remover tool under the seal, lined up the caulk gun behind and hauled butay across the top of that cab in like 1 minute flat ! I'm llike cool, that looked easy HA let's just say the operator apparently makes a difference in this situation

 

In this case something probably got twisted or pinch during the build, drop by a dealer.