89
Issues
On-Engine Fault Diagnosis Table
Oil
s
e
al
at
turb
ine
s
ide
leak
s
.
Oil
s
e
al
at
gas
co
mp
re
sso
r
s
ide
lea
k
s
.
T
he
re
is
per
iod
ic
n
ois
e
in
turboc
har
ger.
T
u
rboc
h
arg
er
h
as
t
oo
lou
d
n
ois
e
in
w
ork
ing.
B
lue
smo
ke
ris
es
from
d
ies
e
l en
gi
ne.
D
ies
el
engine
has
e
xc
e
ssi
ve
D
ies
el
e
ng
ine
is
B
lac
k
sm
o
ke
r
is
es
fr
om
d
ies
e
l en
gi
ne.
Possible Causes
Elimination Approaches
√
√
√
√
√
Air filter is too dirty.
Clean or replace the filter
element.
√
Air leaks from pipeline between
air filter and gas compressor.
Tighten the fasteners or
replace the sealing parts.
√
√
√
√
√
Air leaks pipe between gas
compressor and inlet duct of
diesel engine.
Replace the sealing parts
or tighten the fasteners.
√
√
√
√
Intercooler is too dirty.
Clean the intercooler.
√
√
√
√
√
Air leaks from joint face
between diesel engine
’
s inlet
manifold and cylinder head.
Replace the gasket or
tighten the fasteners
