ISX engine 800k miles burning oil

[Waterloo]

Well... My head blew at roughy your mileage... I have the CM-871, 2008 ProStar... The head was toast, but had the entire in frame done along with a bunch of other stuff... If it is a bad head, which more than likely it is, especially if you still have the mandate on, at least buy a NEW head, do not go reman or rebuilt. Spend the few extra hundred dollars and do it right. The rest of the motor is up to you. I probably could have gotten by with just a head and a lower end bearing swap... But, knowing enough about this stuff, i went the full monty and bit the bullet. It was an easy decision to make. They don't build these things like they used to.