Water ingress

[Shox Dr]

Where/how does the water get into the cab, that ends up in the rear corners


Cheers

[59chev]

If the seam sealer has dried up on your drip rails the water can seep in and run down the inside of the back wall of your cab. It then collects in the rear cab corners.

[OrrieG]

The inside of the back corners are open to the inside and outside corners below. There are holes where the inner and outer join that get clogged. When Farmer John, and guys like me who used the truck, hose down the inside to get rid of the mud, spilled gas, dog hair, etc, water runs down and gets trapped between the inner and outer panels. As the inner panels rust away water off the tires, pavements, etc. splashed up and get trapped too. I made panels to close off that area on mine and made sure my new inner (I fabricated) panels had generous drainage space. 59chevy is right about his too, I had never thought of the drip rails leaking. Also if you live in an area that has high humidity condensation can form on the inside of the cab corner and run down too.

[BlueJeep]

If it's an AD truck the seam in the back of the cab between the top and the bottom half often leaks water, so every time you wash the truck it will leak.