Buly,

I thought so too. (Was a Engine-man on Merchant Ships in a different live :))
However it only does it at WOT (or the diesel equivalent...), not ANY
indication of smoke anywhere else.
There is lots of Toyota Diesels running around here and a lot DO smoke all
the time - I assume negligence with maintenance...).
If you are familiar with the claims of Acetone in fuel (should clean the
fuel system just fine....), it should help a lot with keeping the injectors
clean.
110K km is normally nothing for a Toyota Diesel....

Probably I am just fishing for a different explanation - no shops to do such
a job (Injector adjustments/overhaul) around here.
Any tests I can do to rule out other causes?

TJ

Try oil residue built up in the muffler that only smokes once the system is up to temp. Or a broken spring in one injector so the pop pressure is down and atomization is poor.

 

Lynn E. Hanover