Cm870 upgrades

[Rawze]

(01-19-2017 )Rig Wrench Wrote:  Well, everything went pretty well, engine really in good shape for 850k miles, some head cracks, cam bearing wear, ect. Not too much out of the normal. But number one was slightly scored up. Ant I found this. Plugged number 1 piston cooling jet. What gets me is I don't know what it is, or how it got there. I've done work/maintenance on the truck for the past 400k miles. Could it have really lasted that long plugged up?
It looks like a small piece of plastic tubing. Can't find any other remnants though

I have seen this a few times, and it is unpredictable. Happens on cylinder 1 or 2 most of the time.

I have seen people loose an engine over it too.

=======

I am thinking it happens during an oil change? - or perhaps a seal failure somewhere? -- but where? -- It would have to be past the oil filter, but before anything like the turbo, air compressor, etc.etc. because most of those components drain back to the pan, where the oil filter would catch it instead.


It would be nice to know.

Maybe an internal seal failure in the oil filter ?

Maybe oil filter bypass valve seal failure?

It cannot be but only a couple places for a seal to fail between the oil filter and the cooling jets.

=============
{ december 2018 UPDATE:-> This is common with certain brands of oil filters, Baldwin and a couple others being one of them. Fleetguard filters had a design change to prevent just this problem. - I have seen several failed engine due to this exact problem and it is the oil filter seal that gets sucked into the engine with some brand of oil filters.