One of those times where you're hearing bits and pieces of a conversation, and then end up wondering if what you heard is what you heard
Three RV'er's talking close enough for me to hear good parts of the conversation. One gent said he'd called Cummins with the Serial of his ISX600. (Believe he said it was an early 2006 engine build.) And that Cummins said that they did not have revised heads for the ISX600. A second gent was suggesting he look into Aftermarket Head Builders, as he said they had ISX600 heads with improved alloys (Could not tell if he meant the heads or the valves...). The third RV owner, was facing away from me, and said perhaps the difference was between the CM870 and CM871?
As I was reflecting on the conversation. I thought I remembered reading that Cummins had revised heads/valves for both the ISX600 and ISX650? Got me wondering if maybe the third RV owner was correct, and their dependent upon which CM build the engine has(?).
I ask, as a gent in San Diego is considering a coach with a 2006 engine ISX600. And I frankly admit that this conversation taught me, after all of the posts on ISX's, I was unclear on what Cummins did, or did not have, in regards to redesigned/improved heads. He's trying to determine a good price point, especially if he might go ahead at purchase and have Cummins swap out the head's (He was thinking it was about $15K for the materials and labor.). (He's called the owner to ask for the Engine Serial Number, and is going to call Cummins to see what they can tell him. But the owner of the coach said it would be over the weekend before he could get out to storage and get the engine Serial.)
TIA for any info sharing on this (And yeah, I did ISX search... But nothing jumped out at me on which ISX's had new revised head's available from Cummins.)
Heck lots of ISX's:
Within the era of potential Drop Valve issues... And I believe some ISX's had Ceramic Plunger's that would break apart and wreck havoc too... (Trucker's sites talk about that. But most in the higher mileage range then most RV's will ever see...).
Enough rambling, TIA for any clarification thoughts,