Rawze's Daily blog...

[Rawze]

(05-13-2016 )Brock Wrote:  What caused you to do a inframe? Did you have a failure or was it just getting tires and you wanted to stay ahead of it?

IT WAS NOT THE HEAD GASKET. -- It was a leaky injector cup in the head, and some of the valves, you could see oil seeping from them in the intake, indicating the guides were starting to wear down. -- really, all it needed was a head, but at 1 million on it,.. I decided to do the whole thing as a preventative step.

If i could go back in time and do it again,.. I would have replaced the head at 700k miles as a scheduled maintenance item,.. The rest would likely have lasted 1.5 mil or more easily,.. when the next head was due again.

When this head gets 700k on it,.. I am going to replace it and continue on. It seems that 90% of all problems with ISX CM871's internal to the engine is in fact the head. It simply wears out at 700 - 800k no matter what you do. After that, it is simply a matter of time before it fails.