TURBOCHARGER SYSTEM
-
Precautions, Troubleshooting
TC-5
11. If the engine
is
running with the air cleaner, case cover and
,
hose removed, entry of foreign particles will damage the
wheels which run at extremely high speed.
TROUBLESHOOTING
HINT:
Before troubleshooting the turbocharger, first
check the engine itself. (Valve clearance, engine compres-
sion, injection timing etc.)
INSUFFICIENT ACCELERATION, LACK OF POWER OR
EXCESSIVE FUEL CONSUMPTION
(Possible Cause)
(Check Procedure and Correction Method)
1.
TURBOCHARGING PRESSURE TOO
I
LOW
t
Check turbocharging pressure. (See page TC-8)
Turbocharging pressure:
0.61
-
0.81 kg/cm2
(8.7
-
11.5 psi, 60
-
79 kPa)
If the pressure
is
below specification, begin
diagnosis from item 2.
Check intake air system, and repair or replace parts
as
necessary. (See page TC-8)
3. LEAK IN IN
Check intake air system, and repair or replace parts
as
necessary. (See page TC-8)
4.
RESTRICTED EXHAUST SYSTEM
Check exhaust system, and repair or replace parts
as
necessary. (See page TC-8)
5.
LEAK IN EXHAUST SYSTEM Check exhaust system, and repair or replace parts
as
necessary. (See page TC-8)
Check plays of turbine shaft. (See page TC-12)
I
6.
ERRATIC TURBOCHARGER
OPERATION
Axial play: 0.13 mm (0.0051 in.) or less
Radial play: 0.18 mm (0.0071 in.) or less
If not within specification, replace the turbocharger
assembly.
assembly.
1
'
Check rotation of impeller wheel. If
it
does not turn
-
or turns with
a
heavy drag, replace the turbocharger
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