6CTA8.3-M3 Turbo health

[bluebyu]

Exhaust side of turbo is a black baked texture. Wiping a finger across the surface produces soot and a slight oil sheen.

Is this a concern?

Manifold gasket shows no evidence of leaking. Do the experts agree?

Info:
(Edited), Engine does not use oil over 50 hour season.
Turbo off only for PM, no issues.
Considering upgrading exhaust elbow.
S# 45561581, CPL2172, 1997, 787 hours
Owned for 3 years, use about 50 hours per year.
We run 90% of time at 1200 RPM’s, maybe 5% at 2200 RPM’s

On a different note, cleaned turbo heat exchanger 2 years ago. Very hard to get apart. Cleaned assembled the SeaBoard way. Removed yesterday for 2 year service, pushed the core out with my hand! (mostly fresh water) THANKS TONY!!!

Mark

Topic

[bluebyu]

To close the loop on my question about the turbo;
The consensus at Seaboard is the turbo has a small oil leak. It will be repaired.

Will also be sending the exhaust parts to Seaboard to make upgraded mixer. That will eliminate any worries of seawater getting into turbo/engine.

[bluebyu]

Thanks Rob,

I was concerned that perhaps the turbo had a oil leak?

We boat on the upper Chesapeake, maybe brackish would be a better term.

Yes, aftercooler.

[Rob Schepis]

For a low load running C-series you may wish to change out to a 180 deg tstat so she runs a tad cleaner.

Have some pics of the exhaust you are considering upgrading?

Your last paragraph refers to the aftercooler, right? That sounds real good.

Where on the east coast do you boat that is “mostly” freshwater?

[Author]

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