Cm871 oil pressure loss

[Waterloo]

I would give it a solid EGR tuneup, along with a new doser as that is more than likely carbon'd up too. There used to be a core deposit on the doser, so don't throw out the old one.

There is a video series in the video link at the top of the page on how to do an EGR Tuneup on the CM-871. I would recommend watching the series.

I would do the EGR Tuneup ASAP, and clean the soot out, a little elbow grease is required, then do the overhead and inspect the cams.

When you do the EGR tuneup, replace the oil pressure sending unit, and I would also replace the cam and crank sensors, they are both the same sensor, get two.

When under the valve cover, inspect the Jake harness. You are looking for brittleness and broken clips, etc. If funky, replace.

Also, inspect the DPF/DOC cans, make sure the dealer installed what they said. More than likely a good EGR tuneup will get you rolling if the dealer told the truth. The iMap sensor is the crucial one, it is located on the intake pipe going into the block.

You have a good motor there, but they can be a real PIA to straighten out if they have been previously abused or neglected.

And don't take this job to the dealer, do it yourself, so that way you know it was done correctly. Never trust the dealer in regards to emissions, they will sell you a turbo and EGR cooler way before they ever fix the real issue, normally that iMap sensor.

Good luck.