2350 fuel pump

[Rawze]

(06-07-2018 )snailexpress Wrote:  I don't know if my post will stop you from doing expensive mistakes or not but I will try at least.
First question is why you decide you need to repair fuel pump?
Did you have some diagnostic or any symptoms to say the fuel pump is on the way?
Was it done some oil analysis showing iron increased?
Did you verify with Cummins what the plungers is installed in pump and pump part number.
Cummins has released a lot of different model of pump and parts are not interchangeable but looks very same. I have seen five different pump on 2250. Pump for 2350 is different story.
If wrong part got installed the pump with engine going to the junk yard.
Don't read too much what is posted by guy who like to tell horror stories.
The truck mileage doesn't matter as I have 650000 and pump was inspected at 600000 in mr Haag shop. No any evidence of wear or something wrong.

Just because your own made it that far does not mean it is the norm...

My own recommendation is based on how many and when they fail. i have seen dozens and dozens of failures. I would have to say that a person with a CM2250 or CM2350 should replace the guts of the high pressure fuel pump every 400k miles, 500k max as a preventative measure BEFORE THERE ARE ANY SIGNS OF FAILURE!. Most of the ones I have seen failed roughly between 450k and 550k miles without any measurable warning whatsoever. -- Nothing to play with if you really care about your engine.