Cab Back - Rust
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Joined: Feb 2007
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Cab Back - Rust
Gentlemen,
I am working on my 1977 Ford F250. I was able to sucessfully cut out and weld in new floor pans (thanks to the help on here). I was preping the rest of the cab interior to prime/paint, and found more rust at very back of the cab where the floor meets the back wall. The floor was solid, but the back panel where the floor meets it was rusted in a couple of places for about 1/2". It was thin enough that I was able to jam a screwdriver through it. The places were driectly below the edges of the back window glass... I am assuming that the back window is leacking somewhere to cause this? I am going to try to get a better look tonight from under the truck to formulate a plan, but Just wondering if this was a common rust area, and if it was the back glass or something else so when I do fix it it does not re-occur.
THanks.
I am working on my 1977 Ford F250. I was able to sucessfully cut out and weld in new floor pans (thanks to the help on here). I was preping the rest of the cab interior to prime/paint, and found more rust at very back of the cab where the floor meets the back wall. The floor was solid, but the back panel where the floor meets it was rusted in a couple of places for about 1/2". It was thin enough that I was able to jam a screwdriver through it. The places were driectly below the edges of the back window glass... I am assuming that the back window is leacking somewhere to cause this? I am going to try to get a better look tonight from under the truck to formulate a plan, but Just wondering if this was a common rust area, and if it was the back glass or something else so when I do fix it it does not re-occur.
THanks.
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
It's not common like floor pans or cab corners but it's not rare either. The most common cause is water leaking around the rear window weatherstripping.
Once you repair the rust, get a good coating of epoxy primer on it and paint.
What kind of shape was the weatherstripping in? It might need to be replaced.
Once you repair the rust, get a good coating of epoxy primer on it and paint.
What kind of shape was the weatherstripping in? It might need to be replaced.
Logistics Pro
Joined: Jan 2005
Posts: 3,534
Likes: 85
From: penn twp.
Something else to check is all of the seam sealer on the cab. Over time it can shrink and cause tiny cracks to form which will cause water leaks. Best way to find a water leak is with a garden hose set with a wide spray pattern. The idea is to simulate a spring day rain shower. Then allow the water to flow over the rear of the cab and check for where the water is coming into the cab. It's best to have someone help with this. Another option would be to run the truck through an automatic car wash and look around for water leaking into the cab. When replacing the seam sealer it's best to use a 2 part urethane sealer. It's a little more costly. But lasts much longer and is more resistant to shrinking and cracking. Just be sure to read and follow all of the instructions to get the best results.
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