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Asking about the differences between the 5.9Are you asking about the differences between the 2nd and 3rd generation 5.9 Cummins ISB or the differences between the 5.9 and the 6.7?
I have an 05 5.9 think it was a 53 blockSays '06, so that's 3rd Gen common rail, so it is beyond the 53 block cracking issue, and AFAIK beyond the killer dowel pin. I'd guess high EGT dropped a valve seat, or injector hung and holed a piston. Some break rings in #6(?), but shouldn't be catastrophic.
I'm pretty sure the cracking 53 issue was gone by about '02. I have never heard of later models weeping coolant like the problem 53 blocks. Not all 53 blocks were bad, AFAIK.I have an 05 5.9 think it was a 53 block
Asking about the differences between the 5.9