Nissan Almera Tino V10. Manual - part 870
EM-136
[YD]
EXHAUST MANIFOLD AND TURBOCHARGER
TROUBLE DIAGNOSIS OF TURBOCHARGER
Preliminary check:
●
Check that the engine oil level is between MIN and MAX of the dipstick. (When the engine oil amount is
more than MAX, the oil flows into the inlet duct through the blow-by gas passage, and the turbocharger is
misjudged failure.)
●
Ask the customer if he/she always runs the vehicle in idle engine speed to cool the oil down after driving.
●
Replace the turbocharger assembly when any malfunction is found after unit inspections specified in the
table below.
●
If no malfunction is found after the unit inspections, judge that the turbocharger body has no failure. Check
the other parts again.
A: Large possibility
B: Medium possibility
C: Small possibility
Inspection item
Inspection result
Symptom
(when each inspection item meets each inspection result)
Oil leakage
Smoke
Noise
Insufficient power/
acceleration failure
Turbine wheel
Oil leaks
C
A
C
C
Carbon is accumulated
C
A
B
B
Friction with housing
C
B
A
B
Blades are bent or broken
A
A
Compressor wheel
Inside the air inlet is seriously con-
taminated by oil.
B
B
Friction with housing
C
B
A
B
Blades are bent or broken
A
A
After checking both turbine and
compressor, inspect rotor shaft
end play.
There is resistance when the rotor
shaft is rotated by your fingertips.
C
C
B
The rotor shaft sometimes does not
rotate by your fingertips.
A
There is too much play in the bear-
ing.
C
C
B
C
Oil return port
Carbon or sludge is accumulated in
the waste oil hole.
C
A
C
C