WACKER Group LTC 4, Repair Manual

Page: 91 / 166

LTC Repair Caterpillar Engine Troubleshooting
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87
6.11 General Engine Troubleshooting
Possible Cause Symptom
E
xcess b
lack smo
k
e
B
lue smo
k
e
W
h
it
e sm
oke
In
crea
sed
oil con
s
ump
tion
Unu
s
ua
l n
o
ise
s
La
c
k
o
f
po
wer
In
crea
sed
fue
l con
s
umpt
io
n
O
v
er
he
ati
n
g
H
a
rd
st
ar
ti
ng
/en
g
in
e
m
issi
ng
Deb
ris in
oil
fil
te
r
Dirty primary/secondary air cleaner • • • •
Overfueling •
Overloading •
Worn rings/liners •
Worn seals • •
Worn valve products •
Leaking head gasket •
Cracked head or liners •
Faulty injector •
Incorrect starting procedure •
Incorrect fuel injection timing •
Low quality fuel • •
Worn or broken rings/liners •
Worn valve guides •
Malfunctioning fuel nozzle/injectors • • • •
Worn piston pin bushings •
Worn rod/main bearings •
Too much valve lash •
Dirty fuel filter •