On-Vehicle Inspection Of Turbocharger; Inspect Intake Air System; Inspect Exhaust System; Check Turbocharging Pressure - Toyota 1PZ Repair Manual

TC-8 TURBOCHARGER SYSTEM
TURBOCHARGER

ON-VEHICLE INSPECTION OF TURBOCHARGER

1.

INSPECT INTAKE AIR SYSTEM

Check for leakage or clogging between the air cleaner and
turbocharger inlet and between the turbocharger outlet and
cylinder head.
• Clogged air cleaner .... Clean or replace the element
• Hoses collapsed or deformed .... Check each connection
and repair
• Cracks in components .... Check and replace
2.

INSPECT EXHAUST SYSTEM

Check for leakage or clogging between the cylinder head
and turbocharger inlet and between the turbocharger outlet
and exhaust pipe.
• Deformed components .... Repair or replace
• Foreign material in passages .... Remove
• Leakage from components .... Repair or replace
• Cracks in components .... Check and replace
3.

CHECK TURBOCHARGING PRESSURE

(a) Warm up engine.
(b)
SST 09992-00241
(b) Press in the clutch pedal, then press the accelerator
Standard pressure: 0.50-0.65 kg/cm
If the pressure is less than specification, check the intake air
and exhaust systems for leakage. If there is no leakage,
replace the turbocharger assembly.
If the pressure is above specification, check if the actuator
hose is disconnected or cracked. If not, replace the turbo-
charger assembly.
4. INSPECT IMPELLER WHEEL ROTATION
(a)
(b) Grasp the edge of the impeller wheel and turn it.
If it does not turn or if it turns with drag, replace the
turbocharger assembly.
Turbocharger
Connect a 3-way union to the intake pipe pressure
hose and install SST (turbocharger pressure gauge) to
it.
pedal down as far as it will go. Measure the turbo-
charging pressure at maximum speed (4,400 rpm).
(7.1-9.2 psi, 49-64 kPa)
Disconnect the air cleaner hose.
Check that it turns smoothly.
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