ISX15 CM2350 injector cups

[kozakvod]

(03-01-2020 )Signature620 Wrote:  Cummins sell a tool that installs injector cup retainer/crush rings in the head while it's still on the engine. I've had and heard of a very high success rate doing it this way. It isn't even that big of a job so it's worth a try.

Just need the injectors out and the rocker shafts removed.

This only works on CM2250 and 2350 engines. Fuel/coolant cross-contamination on a CM570/870/871 is only rectified by replacing the cylinder head.

I was getting a bit of water into my Water/Fuel separator. After a pressure test it was determined that I had an injector cup issue. Cummins did indeed replace all cups no head removal and so far 100k miles or so later no further issues.