Abnormal Noise; Excessive Oil Consumption - Toyota 1C Repair Manual

EM -14
ENGINE MECHANICAL - Turbocharger Diagnosis
ABNORMAL NOISE
(Possible · e ause)
1. TURBO INSULATOR RESONNANCE
2. EXHAUST PIPE LEAKING OR
VIBRATING
3.
ERRATIC TURBOCHARGER OPERATION
(Check Procedu re and Correction Method)
Check for loose, improperly installed or deformed
insulator mount bolts, and repair or repliice
as necessary.
Check for deformed exhaust pipe, loose mo unt bolts
or damaged gasket, and repair or replace as neces-
sary.
Refer to item 7 of INSUFFICIENT ACCELERATION,
LACK OF POWER OR EXCESSIVE FUEL
CONSUMPTION.
EXCESSIVE OIL CONSUMPTION OR WHITE EXHAUST
(Possi ble Cause)
FAULTY TURBOCHARGER SEAL
(Check Procedure and Correctio n Method )
Check for oil leakage in exhaust system
• Remove the turbine elbow from the turbocharger
and check for excessive carbon deposits on the
turbine wheel. Excessive carbon deposits would
indicate a faulty turbocharger.
Check for oil leakage in intake air syster,1.
• Check for axial play in impeller wheel, and replace
the turbocharger if necessary.
(See page EM-43) .
CAUTION: There is some oil mist from the
PCV in the blowby gas so care must t,e taken
not to diagnosis th is as an o il leakage from
the tu rbocharger.