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-   -   New to Cummins, Possible Dead Oil Pump? (https://www.dieselbombers.com/1st-generation-dodge-cummins-89-93/84057-new-cummins-possible-dead-oil-pump.html)

jwirth 10-15-2011 08:27 PM

and well make the oil look like metallic paint

tower_ofpower 10-15-2011 08:51 PM

New to Cummins, Possible Dead Oil Pump?
 
Cam bearings are made out of much harder material than the journal bearings. Could be cam bearing material or a full on failed journal bearing. Either one will cause a major oil pressure drop.


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Spartan Inferno 10-15-2011 08:54 PM

Oil did not look like metallic paint, it looked like normal used oil with a couple metallic specks here and there (but not many). Think something could have failed behind the front cover?

tiremann9669 10-15-2011 11:18 PM

:humm: KDP took out oil pump gear possibly :scare2:

jwirth 10-16-2011 02:21 AM

X2 tiremann9669

Lets hope you get lucky and it is just the oil pump. go fishing in the old oil with a magnet and see if you get an more metal out of it.

Spartan Inferno 10-16-2011 01:55 PM

I went through the rest of the oil with a magnet and just got a few more tiny specs, no chunks or anything. And I literally did the KDP fix less than 200 miles ago and loctited the bolt in, plus it was nowhere near out when I checked. Maybe something else came out behind the cover? I need to find a spot other than the parking lot that I can wrench on it, so I can take the front end apart to the point where I can easily remove the front cover.

tiremann9669 10-16-2011 10:27 PM

Did you loctite all of the case bolts ? :c:

NadirPoint 10-16-2011 10:51 PM

I don't like the looks of that drain plug at all. I'm thinking top-end issues, based on the way it went down.

Spartan Inferno 10-17-2011 01:09 PM

The only bolt behind the front cover that came out was the one for the KDP fix and it got loctited.

What makes you think it was something in the top end? I feel like the oil pump had to have failed to start it all, since the first symptom of something wrong was my oil pressure disappearing.

NadirPoint 10-17-2011 06:50 PM

Here's How I See It
 
From what you stated originally:

Engine had 300k miles. Maintenance history? Valve adjustments?

Originally Posted by Spartan Inferno (Post 805874)
the truck started blowing black smoke and stopped accelerating.

Turbo blew. Oil pressure went right along with it, since there is no longer any resistance to flow through the turbo feed.

Originally Posted by Spartan Inferno (Post 805874)
I limped it off the road and into a parking lot, and it made a pretty nasty clunk sound and shut off.

KDP was already fixed, so what makes the clunk in an engine like that?

Originally Posted by Spartan Inferno (Post 805874)
....makes a pretty bad noise when you crank it,

Something came apart, most likely dropped a valve or 2, would be my guess.

Like was asked before: Where does the ferrous wear metal come from?


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