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I just checked the bolts at the turbo base and they are at least 20ftlb, they won’t move any further even if I push it a little over. There are only two bolts at the turbo base, one on each side, correct? (11508475 in the TM)

Copy that! Will do!

Here, it's from another thread: Turbo Intake Manifold Leak - Causes?

Here, it's from another thread: https://www.steelsoldiers.com/threads/turbo-intake-manifold-leak-causes.208548/post-2435460 EDIT: I meant to reply to the post above

Actually now that you mention it, I am not sure if I did the bottom screws, for sure I did the 6 or so at the top and I ordered new turbo bolts because I felt they were a little rounded…I really was looking for a reason to open the turbo, but I agree that need to double-check the tightening...

The way I understood it, is pouring water in the turbo input and watch if it comes out thru the oil feeds, and it shouldn’t,

I am about to open the Turbo to change the snowman and the other seal, anything else I should be on the lookout for? I will also do a cartridge leak test. Is that much oil coming out from the Turbo base and indication of some bigger issues than just seals?

Got it! How about for the geared hubs, geared fan, differentials and transmission?

So I ran the truck today to test the valve cover leaks, four are fixed, there is one left, toughest one behind the alternator, working on it. I went just up and down the street and when going up hill or accelerating a little, the oil comes flowing, not leaking, from the bottom of the turbo, It...

I did hear about the synthetic potential risk for leaks and I also did a lot of research :) because I wanted to use the best technology. I ended up using synthetic on another REV HMMWV that had last oil change around 2013 (based on the oil filter date and mileage) so it sat for a while and...

Yes, there is so much other open space around these two dust covers where stuff can get inside, maybe the rubber mentioned above is to prevent rattling as it’s metal on metal and a relatively large cavity so maybe can resonate. I am just speculating…nice touch if that’s indeed the case :)...

Ok, I am about to test if the valve cover leakage stopped with the engine running and while cleaning the two cover pieces (one large and one smaller extension) noticed that some of the gunk seemed thicker, almost like dried RTV residue, but I am not sure because there was no resistance when I...

I didn’t have oil coming out the oil fill tube after changing the oil, only vapor, but there is some oil from before in the intake duct, and I presume in the turbo as there is small seep at the top and perhaps that’s what triggered the engine being rebuilt.

I think you are again, right on the money! Because the valve cover leak was bigger after I changed the oil (went to areas where it wasn’t before) which made me think maybe it didn’t get many hours of running after the rebuild, and just tightening the cover bolts stopped the leaking. Also the...

Yes sir! :) Sounds like a good plan, thank you!

Then it sounds like that could be a valid path thru which the leaking compressed air would make it out thru the oil fill tube and bring up some oil with it, and create the whistling when opened. If that’s the case why is there some vapor that looks like exhaust? Or maybe it isn’t exhaust and...

Which brings up another question, where is the oil return line outputting into? Directly into the oil pan? And the oil pan is connected to the oil fill tube where the blow-by comes out of?

Got it, thanks for clarifying! (that’s why I have been asking which one is which)

I first thought the same thing, that it leaked on the small return line, but the water comes out on the larger, oil input line.

Found your post with lots of turbo pictures, not sure how I missed it, it has so many details I was looking for, excellent info, thank you for your efforts to document it!