1-2
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GENERAL ENGINE SERVICE
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Section
Page
1 Engine
Troubl
e Diagnosis
..
1-
2
2
Tune-Up
..
.
.........
.
....
1-
7
Engine Compression Test.
1-
9
Fina
l (Hot) Valve
Lash
..
1-16
Cams
haft
lobe
lift.
. .
..
1-1
7
Manifold Vacuum
Test..
1-17
Preliminary (Cold) Valve
Lash
.............
I-I S
Th
is
pa
rt
covers engine trouble
diagnosis
and
tun
e-up
procedure
s for
the 223
Six engine,
the
medium-dut
y
(292) and
th
e h
eavy-duty
(292, 302,
Sec
tion
P
age
3 Cleaning, Inspection, a
nd
R
eco
nditioning
......
......
1-19
Intake Manifold
........
1-19
Exhaust Manifold
...
.
...
1-19
Valve Rocker
Arm
Shaft
Assembly .
...........
1-19
Push Rods
...........
" 1-19
Cyl
in
der
Heads
.........
1-
19
and 332) V-8 eng
in
es.
In
addition,
the
cleanin
g,
inspec
ti
on,
repair, a
nd
overha
ul
procedu
res
for
these
co
-
gines arc covered.
D ENGINE TROUBLE
DIAGNOSIS
Engine performance complaints
usua
ll
y fall under
one
of
the basic
h
eadi
ngs list
ed
in
the
"Engine
Trou
ble Diagnosis
Guide."
When
a
par
ti
cul
ar
tr
oub
le can
not
be traced
to a definite cause by a simple
ch
eck,
the possible i
te
ms that could be at
fault are listed in the order
of
their
probable occurrence. Check the
items
in
the
order
li
sted.
For
ex-
amp
l
e,
under Poor Acceleration the
ig
nit
io
n system
is
listed as a proba-
ENGINE
TROUBLE
DIAGNOSIS GUIDE
ENGINE
WILL
NOT
CRANK
ENGINE CRANKS
NORMALLY,
BUT
WILL
NOT
START
Th
e cause of this trouble is usua
ll
y
in the starting system
(Pa
rt
12-2).
If
the starting system
is
not
at
fault, check for a hydrostatic lock
or
a se
iz
ed engine, as fo
ll
ows:
Remov
e the spa
rk
plug
s,
then
at-
te
mpt
to crank the engine with the
Ch
eck
the fuel suppl
y.
If
there
is
sufficient fuel in the tank, the cause
of
the trouble
prob
ably lies
in
either
the igni
ti
on or the fuel system.
To
determine w
hi
ch system is at
fault, perform the fo
ll
owing test:
Disconnect a spark plug wire.
Ch
eck
the
spa
rk
intensity at
the
end
of
the w
ir
e by
in
sta
ll
ing a terminal
adapter
in
the terminal
of
the wire to
be checked.
The
n, ho
ld
the adapter
approx
im
ate
ly
o/w
in
ch from the ex-
hau
st manifold and
crank
the engine.
Section
Page
Valves
.................
1-
20
Timing
Chai
n-223
Six
a
nd
292
V-S
..
........
1-
21
Timing
Gears
- 302 a
nd
332
HD
V-S
........
. .
..
1-21
Ca
msh
aft.
. . . . . . . . . . . . . . 1-
21
Crankshaft
....
. .
..
...
. . 1-22
Co
nnecting
Rods
....
.
...
1-22
Piston
s,
Pi
ns,
and
Rings..
1-
22
Main
and
Con
necting
Rod
Bearings
.............
1-
24
Flywheel- M
anua
l-Shift
Tr
ansmi
ss
i
ons,
.........
1-24
Cylinder Block
..........
1-25
Oil P
an
and
Oil
Pump
s
..
1-25
Crankcase V
ent
il
at
ion
System
Ma
intenance
...
1-26
For
eng
in
e removal, disassembly,
assembly, and installa
ti
on
proce-
dures, refer to the
part
of
th
is
group
which covers the
app
li
cable engines.
ble cause
of
the
tr
oub
l
e.
All the igni-
tion system items that affect accelera-
tion are
li
sted. Check a
ll
these items
before proceeding to the next prob-
ab
le cause.
starter.
If
the engine
cra
nks, it indi-
cates that water is
le
ak
ing into the
cy
lind
ers.
Remo
ve
th
e
cy
lin
der
head
(s)
and
inspect the gasket
(s
)
andl or head
(s)
for cracks. Examine
the cylind
er
block for cracks.
IF
THERE
IS
NO
SPARK OR
A WEAK SPARK
AT
THE
SPARK PLUGS
Th
e cause
of
the trouble is in the
ig
nit
io
n system.
To
determine if the
ca
use of the
trouble is in the primary
or
the
secondary circuit, remove the coil
high tension lead fr
om
the top
of
the distributor and ho
ld
it approx
i-
mately 3/ 16 inch from the cylinder
head. With the ignition on, c
rank
the
engine and check for a spar
k.
If
the s
park
at the co
il
high te
n-
CONTINU ED ON
NEXT
PA
GE
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