E M · 1 8
E N G I N E MECHA N I C A L
-
Turbocharger Diagnosis
f12H-
Tl
ABN ORM AL N O I S E
(Possible Cause)
1.
TU RBOCHA R G E R HEAT I N S U LATOR
RESONN A N C E
2.
EXHAUST PIPE L E A K I N G O R
VIBRATING
3.
E R RATIC T U RBOCHARGER OPERATION
(Check Procedure and Correction M e thod)
C heck for loose, improperly Installed or deformed
jnsulator mount bolts, and repair or replace as
necessary.
Check for deformed exhaust pipe. loose mount boils
or damaged g a sket. and repair or replace as
necessary
Refer
10
Item
7
of
INSUFFICIENT ACCELER.
ATION. LACK OF
POWE R
O R EXCESSIVE FUEL
C ONS UMPTION.
EXC E S S I VE O I L CONS U M PTION OR W H ITE EXHAUST
(Possible Cause)
(Check
Procedure and Co
r
r
e
ct
ion Method)
C heck for oil leakage in exhaust system.
•
Remove the turbine elbow from t h e turbocharger
and check lor excessive carbon deposits on the
turbine
wheel.
Excessive carbon deposits would
indicate a
f a u lty
turbocharger.
C heck lor oil leakage in intake air system .
•
C
h
ec
k
for a)(ial play in impeller wheel. and replace
the turbocharger
i f
necessary. (See page EM-43
)
A)(ial play : 0. 1 3 mm (0.0051 inJ or less
CAUTION: There is some oil mist from the
PCV i n the blow by gas so
c
are
must
be taken
not to d iagnosis this as an oil leakage from the
turboc harger.
