Table of Contents
Advertisement
PART 1-1- GENERAL ENGINE SERVICE
1-5
ENGINE TROUBLE DIAGNOSIS GUIDE
(Cont.
)
EXCESSIVE FUEL
CONSUMPTION
ENGINE OVERHEATS
ENGINE FAILS TO REACH
NORMAL OPERATING
TEMPERATURE
EJ
TUNE-UP
A
tune-up
is
a
systematic
proce-
dure
for
testing
various
engine com-
ponents, and.
if necessary,
bringing
them
within
recommended
specifica-
tions
10
restore engine efficiency
and
performance.
Determine the
actual
fuel
con-
sumption
with
test
equipment
in-
stalled in
the truck.
If the
lest
indicates
that
the fuel
consumption
is
not
excessive,
de mon-
strate
to
the
owner
how
improper
driving
habits
will
affect
fuel
con-
sumption.
If
the test indicates that the fuel
consumption is
excessive, make
the
preliminary checks
listed below be-
fore
proceeding to the
fuel
and
igni-
tion
systems.
PRELIMINARY
CHECKS
Tires (Part 7-3).
Wheel
alignment
(Part
7-3)
.
Brakes.
Tempera ture
sending
unit
(
Part
II-I).
T
emperature
gauge (
Part
I
I-I
)
.
Exhaust
gas
control
valve
(
Part
I-
I
)
.
Cy
linder h ead
bolt
torq
u
e
(Part
1-2,
1-3,
or
1-4).
T emp
er
ature
sen
d
ing unit
(Part
II-I).
Temperature
gauge (Part I I-I).
The Tune-Up
Schedule
(Table
I
)
is applicable
for
either a minor
or
major
tune-up.
A minor tune-up
is
recommended each
8000
miles
and
a
major
tune-up
is
recommended each
24,000 miles.
The reference
after
Exh:;uSI
gas
control
valve
(Part
1-2,1-3, or 1-4)
.
Odometer calibrat ion
(Par
t
II
-
I).
Ignition
limi
ng (Part 2-1).
Valve
lash
(Part
1-2,
1-3, or
1-4) .
fUEL SYSTEM
(Part
2-2.)
IGNITION
SYSTEM
(
Part
2-
1.
)
ENGINE COMPRESSION
( Part
1-1.)
COOLING SYSTEM
(Part 2-4.)
TORQUE CONVERTER
Cooling
system
(Pan 2-4).
Ignit ion
timing (Part
2-
1)
.
Valves (Part
I-I).
Exhaust
system.
Brakes.
Engine
thermostat(s)
(Part
2-4).
each operation
refers to that part
of
the manual
which
describes,
in
detail,
the
procedure
to
be
followed.
Per-
form
the
operations
in the
sequence
listed.
Hide quick links:
Advertisement
Table of Contents
