Not an apples to apples comparison, but shown to illustrate how inflation has impacted the cost of an engine rebuild. During the 1.3 million miles I ran the C15 CAT in my Peterbilt, I had the engine rebuilt three times, by two authorized CAT shops, block milled each time. First one in 2009 was $15,000. Got lucky with a $6000 warranty credit for head removal and two cylinder liners and pistons, blew six months before warranty expiration. Second one in 2014 was $19,500, and the final job in 2019 was $29,500. Freight rates weren't keeping up with the overhaul costs, made the decision to retire in 2022 pretty easy.