Cm2250 valve guide seals leaking

[joed2323]

How bad is the failure rate on these??

Pulled the turbo then exhaust mani off because of leaky exhaust manifold gaskets and every exhaust port had oil leaking through the guides and out into the turbo and dpf.

I will stick a picture or two with this post, seemed like the #2-#4 cyl had the worst signs of oil leaking through the valve seals, but every cyl has oil popping out.

How bad is this issue with the 2012/13 isx motors?

Sounds like it is a known issue but cummins will not acknowledged it is a issue on these motors, am I partially correct or wrong?

I cant wait to pull the head and see what other worse issues I will or should expect to find.

Any input will be much appreciated...



Basically every cylinder exhaust port looks like in these two pics, was hard to get a good snap shot of what I see.
The turbo has a nice fresh oil coating to it obviously