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Good to hear that Red Rocket! My 84 F250 leaks in the same spot, but thats all rust on it. The 87 parts truck and my 89 don't have any leaks up there, so I didn't photo it. Taking out that dash assy is a really pain in the can! Its good to have access to a area that is almost impossable to see. Now I have fixed my friend's 92 F250, I'll be getting a new windshield for the 89 and get it on the road and shut down the 84 for a frame up restore. Too bad the 87 cab is rusted out along the roof and door jams with cancer rust(good ole Florida, they rust from top down!)
Both there and here about the rain thing. I am ready for some sunshine for multiple days.
Got all the seats and carpet out and used some soap and pressure washer. I got it pretty clean and now I just need it to dry. Gonna have to dry in the basement though.
Wouldn't you know it, just when I get the time to work on fixing this, the weather turns crappy! Anyway, I was just wondering if before using the brush on seam sealer that I got from Eastwood, should I just do that leaking prone area on the driver side, or should I remove all of the original stuff and redo all of it all the way across? Thoughts?
I would first look at your seam sealer's dirs and see what that recommends as far as cleaning the area prior to the application. If not too specific, I would probably apply the new sealer over the old as added protection, of course after removing any loose, crumbling sealer. I would also cover the entire area in case the leak is traveling or more importantly, to avoid any future leaks since the original seal is old enough to leak in one spot already.
I use brake cleaner to hose off the areas, That stuff will remove old paint really good, next and probly the best is good carb cleaner. That will clean off most loose paint without going into the primer paint like brake cleaner will. You will have to experiment to find what works best for your application.
I followed this post and the other as I had a similar leak on my '94. Mine was coming from the harness connectors that go through the firewall under/next to the brake booster. Used strip caulk all the way around, top, bottom and sides of each, and that finally stopped the leak. I had nothing in the cowl - amazingly clean in there too, windshield is solidly sealed and the door seals were all good. Truck has no cab rust at all either. Now my carpet is dry, windshield doesn't get covered with evaporative condensation from the floor and it's only a little louder since I ripped out the soaked foam padding on the firewall and the carpet underlayment.
It's been a year now and so far my 89 F250 has not had anymore leaks!! The bedliner paint seams to be doing really good, I havenot seen any flaking or peeling. Now my new project is the 89 Bronco2 that has a rusted out firewall seam. I found out about a product called "Rust Bullet" which looks good for fixing rusted out seams. Now the fun begins again with the 89 B2. Still havenot found a good cab for the 84, looks like that 87 cab will have to be used.