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Re: 90 crew 1 ton Cummins 47re swap
Back around 2000 one of the military commands tried sprayfoaming the square frames on Hummers to keep the dirt and salt water out. Short lived experiment. All the test frames rotted out way quicker. I wasn't to surprised. It really is no different than guys putting newspaper behind body Bondo. The patch stayed but all the wet mess made the metal adjacent to the repair rust and drop out an even bigger section. If you use foam atleast make sure that it is closed cell so that it doesn't act like a sponge.
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