Here I am

ENGINE OIL CHANGE

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A quick Horse Haul report..Trans and Radiator temps

2018 6.7 Cummins 2 quart engine oil overfill

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I’m not having any luck.

The oil pressure switch should be on the filter housing. One wire for a switch, 3 wires for a transducer.
 
I’m not having any luck.

The oil pressure switch should be on the filter housing. One wire for a switch, 3 wires for a transducer.

I just looked on my truck and I can see this location of the oil filter adapter and it has a large sensor looking thing in the side, (note the picture) with a three wire plug on it. Nothing on top, just a plug. The filter is in the way to take a picture. But, note the boss on the side/edge of the adapter about half way down, that is where the sensor thing is.
What is a transducer?

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A transducer sends the actual pressure signal, vs a switch being on/off.

The last truck I looked at had a 1 wire switch there, maybe they changed it?
 
So I found an ESN from a 2019 SO motor and used that to search for the part number on parts.Cummins.com and it links to the same switch used on the 07-18 6.7’s, which is the 1 wire switch.
 
So I found an ESN from a 2019 SO motor and used that to search for the part number on parts.Cummins.com and it links to the same switch used on the 07-18 6.7’s, which is the 1 wire switch.

Yes, I tried to use '20 but it is different, that's as new as my site went. So, I went to another site that had the '21 and the adapter is slightly different, it doesn't appear to have the boss on the side. I think the sensor number is the same tho. The '20 had two pipe openings on top, the 21 only one. It could be just shared pictures tho. Mine for sure has three wires on it.

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Okay I lied...I pulled the intake elbow off so I could see better and actually had room to take the sensor off and take pictures. The plug has two wires and pins, but the sensor only has one pin, so still just a switch.:p

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All,
Speaking of crankcase filters and other oiling components, I am still familiarizing myself with the newer motor. I was under the truck last night looking around and notice a flattened component that sort of wraps around the oil pan front the passenger side with a “lipped looking” opening - I did not snap a pic as part of my curiosity. I am supposing this is part of the crankcase breathing system? It leaves a slight coating of oil on the frame members behind it.

Am I correct?

Thanks,
Scott.
 
Well you can for sure, many of us do so, but T6 is a 5-40.

The rest of the story is in the TSB.

CAUTION! 15W-40 grade oil CAN NOT be used in any 2019 model year or newer 6.7L
equipped vehicles due to the new designed valve train of this engine. If this oil is
used, it will cause deposits to form in the Hydraulic Valve Lash Adjusters leading
to undesirable noise, and/or engine damage.
 
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