getting black thin liquid leaking from exhaust man

Started the 220 for first time after overhaul
and restoration and have black fluid leaking
from the exhaust manifold on front section and
middle section joint.
I put a front dump exhaust on it fyi due to running
a different turbo.
I'm certain it's not oil because it's to thin and the
oil shouldn't be black at first start up.

The as rings probably aren't seated yet and didn't
run it very long due to custom made fuel lines leaking
at start up so I shut it off and have had a headache with
fuel leaks from the shop that did them,(grrrrr),but the
leaks have been fixed,just concerned about that slobber.

What would be a good break in procedure
for this motor,fresh overhaul,fuel turned
up and no equipment to hook it to.

If there’s any equipment dealers or repair shops near you with a PTO dyno, maybe that would be the way to go. You need to get a load on that engine, get some boost and cylinder temperature, and vary the throttle input for the first few times. When I put a truck engine together, and start it for the first time, as soon as it has oil pressure for a few seconds… I will give it several abrupt full throttle runs up to top rpm limit, only for a couple seconds each time. Then let it warm up for a bit at a high idle (1000 rpm or so), before taking it out and driving it like I stole it. (If something is going to break, I would rather it happen right away, rather than after the customer gets it back) If I can hook it to a loaded trailer, even better, but I won’t flog it as hard if it’s got a load behind it - just let the load work the engine the way it was designed to work. Has been successful for me on many overhauls through the years. This would be hard to do with your tractor obviously, but you kinda get the point. Heavy duty diesel engines need to perform as they are designed. I have seen some of them that were babied too long at first without being worked hard, and they would tend to use oil for quite a few hours/miles before drying up. The ones that were loaded and broken in right out of the gate seemed to have better luck with oil consumption and such. Manufacturers run their engines under load on a dyno typically before they are shipped out. Don’t be afraid to run it the way it was intended. Perhaps you have a farmer buddy that would let you use his land and/or plow, disc, etc to break her in…. Best of luck on your project. By the way, what are you planning on using the 220 for?

Edited by RedHeeler79 - 41 minutes ago at 9:13pm

daughter is going to pull it in speed limit classes.