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Page Title:
ENGINE PRODUCES EXCESSIVE BLACK EXHAUST SMOKE - continued |
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 TM 10-3930-673-20-1
9. ENGINE PRODUCES EXCESSIVE BLACK EXHAUST SMOKE (CONT).
2
KNOWN INFO
TEST OPTIONS
Gear range for operation and load
Visual inspection.
Are the air intake and/or
OK.
REASON FOR QUESTION
exhaust free from obstruction
POSSIBLE PROBLEMS
If air intake and/or exhaust
and/or restrictions?
Air intake and/or exhaust blocked.
blocked, engine will produce
Air leak between intake manifold
excessive black exhaust smoke.
and turbocharger.
Air leak between turbocharger and
exhaust manifold.
Turbocharger malfunctioning,
faulty.
Clean air intake and/or
exhaust as necessary
NO
(Para 5-5, Para 5-4,
Para 6-3).
YES
3
KNOWN INFO
TEST OPTIONS
Gear range for operation and load
Visual inspection.
Are the intake manifold and/or
OK.
REASON FOR QUESTION
crossovers free from signs of
Air intake and exhaust OK.
If air leaks in intake manifold and
air leaks?
POSSIBLE PROBLEMS
crossovers, engine will run rich,
Air leak between intake manifold
produce excessive black exhaust
and turbocharger.
smoke.
Air leak between turbocharger and
exhaust manifold.
Turbocharger malfunctioning,
faulty.
Replace components
as necessary
NO
(Para 4-9 and
Para 5-7).
YES
2-658
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