Pulling the engine down after the cracked charge air cooler caused a fuel to air mismatch and cracked the turbo and exhaust manifold.
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https://www.youtube.com/watch?v=VTCR0QYD5tc
Working on a cabover freightliner with a big cam 3 Cummins that smokes really bad and has some hvac problems as well.
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https://www.youtube.com/watch?v=Z3JM-wgwM3E
Installing a window switch in an International truck and figuring out a no start problem another mechanic created on a Case mxm175 tractor.
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https://www.youtube.com/watch?v=xkur06fQDd0