DaddyDe
Member
I am looking into purchasing a 2012 Monaco Dynasty Palace IV motorhome that has a Cummins ISX 650 HP Diesel engine... Reportedly Monaco only manufactured 18 of those units with the 650 HP Cummins Diesel engine. In subsequent years it appears that they went to the 600 HP engine or smaller... One person in the Forum Community advised that they had heard that the engine has/had a valve problem that can be very expensive to repair. They had also heard that there might be some type of an upgrade kit that could prevent the failure from happening... In searching through the existing threads on this forum one other discussion regarding extended warranty mentioned a Cummins ISX 650 Hp engine in a Winnebago that had a valve issue on cylinder #6 that cost $38,000 to repair. I could not locate any reference to an available upgrade option to prevent the issue. Is anyone familiar of the issue with the valves on this engine or the upgrade options? Thank you in advance for your assistance / guidance.
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