Cm870 low oil pressure

[Rawze]

(07-23-2020 )berrytrucking94 Wrote:  I figured that would be the common answer here.

I’m stumped trying to figure where I went wrong with this, since I bought it with 380k miles 4yrs ago I’ve been the only driver and always tried to keep a close eye on the way it ran. Tuned by a member here, 10k oil changes, nothing but fleet guard filters w/ delo and sta lube added

Overhead run once a year..At one point I had fuel pump issues for a bit that wasn’t corrected right away. Also had a slowly sticking vg vein a while ago that may have been causing some over fueling? Could this hav affected it?

We haul 100k gross all day, could it be that? Did I go wrong somewhere with maintenance? Just plain bad luck?

If I can avoid this happening as fast in the future any advice is great

I would have suspected overhead not done every 2 years or so, but you said you did it every year. Would be interested in seeing how much wear there was on the rest of the bearings in the top end. It is kinda odd you lost 2 of them, I know they likely did not go at the same time. - It ever had a history of low oil pressure issues? - Overhead cam ever been replaced?

sounds like you went out of your way to take care of it fairly well according to your post, would be curious if you had other excess wear in that engine.

Have you ever let it overheat (coolant above 225F)? oil above 240f? - Would be curious what the ecm history reports for high coolant or high oil temps were.