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Hot take: The Cummins ISX has some weird quirks I never expected
I was reading Diesel Tech Magazine last week and saw a stat that 1 in 4 ISX engines has a camshaft issue before 300,000 miles. My buddy's 2017 Cascadia just lost power in Phoenix last Thursday and it turned out to be the fuel actuator stuck open. Has anyone else run into these issues on the ISX or is it just our luck?
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perez.patricia1mo ago
Whoa, that's interesting about the rear bearing. I had a 2014 ISX that started making this weird ticking noise and everyone online said it was injectors or something stupid like that. Turned out the rear bearing was walking out just like you said, but it was the oil pump that actually gave up first, which nobody talks about.
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Man, I heard the same thing from a mechanic buddy who swears the ISX camshaft issues are way more common than people admit. He told me it's usually the rear cam bearing that goes first.
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piperwhite1mo ago
Wait, rear cam bearing goes first? I thought it was always the middle bearing that starts walking out on those.
My buddy just had his whole cam setup fail at 400k miles and the shop told him it was the rear bearing that took everything with it.
That's wild though, I've been running these engines for years and never heard anybody pin it on the rear one specifically until now.
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