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Ok, I will replace it with a regular one. I plugged that in just to see if the blow-by improved and I didn’t connect the vent lines. I was thinking that if the oil fill cap is open the CDR valve does’t have any effect as the blow-by would exit there without making it down the intake/ CDR...

Actually, there are only about 100 hours on the Tachometer, maybe it got replaced and that’s all the engine had after the re-build?

Aha! I was actually wondering why the engine is black and now I know, thank you! EDIT: I thought it was all covered in oil :)

Wow!!! That’s amazing troubleshooting! Yes, I did use a DWF CDR valve, only because that’s what I had laying around, and didn’t even think about it until now that you mentioned it. But, when I open the oil fill tube to check the blow-by , isn’t the CDR being taken out of the circuit as the...

Thank you! I am not familiar with the terminology, thought “snow man” was a typo after I googled it and didn’t find anything :) Got it!

Sorry, which one is the Turbo main seal, I only found this turbo diagram in the engine manual and it shows only one O ring, item #2: Is there another manual with expanded view of the turbo internal components?

How can you tell that it was rebuilt? From the RTV on valves seal cover?

Thank you! I feel more optimistic now :) I will pressure wash the engine and report back. Still don’t feel good about the blow-by, will do a video, not sure if it’s too much.

Oil pressure looks good and one interesting thing is that it doesn’t do the glow-plugs pulsing that my 1165A1 does, even as they were both built around the same time: EDIT: The alternator is working and the batteries are being charged.

Ok, so like many here I ended up buying a 2008 REV M1151A1 with 8k miles, initially for parts, but after picking it up, found that it had an IROAN in 2012 and it shows that the air filter was last replaced in 2020 at around 5k miles. The good news is that I was able to get it started and after...