2015 Frlr Cascadia evo leaking when it rains right after purchase

Lol this days truck are build poor I wish it could be like old days build with quality not quantity

 

That's exactly how every truck are build now freind of mine has n14 Cummins on a kw he has 2mil miles still going frame is falling apart and all he did regular maintenance and turbo change no stupid electronic

 

The only issue I had was the stupid dpf after treatment system spend so much money just to fix it other then that it runs great but it depends on who drove the truck my suggestion is don't buy from fleet companies truck you never know who drove it and if your going to buy it check everything Dyno test, oil sample, bigrig.com for Vin history, frame ECT ECT

as far as when to rebuild like I was saying it depends who drove it how well it was taken care of

 

I think it that range but it depends on how the engine was taken care of I seen truck with 1mill miles and still running strong

 

Update I took it back to dealership bodyshop. All headliner was removed they sprayed water everywhere and couldn't duplicate the water leak. What should I do next tell them to pay for linex with uv coated or replace the roof or just deal with it