Camshaft failure Cummins isx15

[Rawze]

(08-05-2023 )RichHomie27 Wrote:  

(08-04-2023 )JimT Wrote:  have you checked/rebuilt your fuel pump head? you didn't mention exactly which engine, but if there's only one cam then you have a common rail with the high pressure pump that is subject to failure, usually around the 400-450k mile mark (or equivalent hours in your case). They are known for sending ceramic (on the original ones) or metal debris into the oil and through the engine. chewed up cams are a common result. Plenty of info about them on this forum if you search.

No haven’t replaced fuel pump myself but it has been replace before, truck has 695k I’ve only had it since 636k it’s a Cummins ISX15.
I’m replacing camshaft/12 rockers, oil pump, oil cooler, rods and mains.

Neglect and making assumptions are the biggest killers for ISX engines...

and pull that fuel pump head off while you are at it and replace its guts while you are doing all the other work if you do not know exactly how many miles/hours on the guts. They are good for 8,000 hours or 400k miles at a time .. and then the guts need replacing no matter what they look like inside.m entire engine gets destroyed with little to no warning signs otherwise.