Extra Information
THECYLINDER
HEAD
1 .
Remove
the
"collets"
and
valve
springs
using
a
valve
bow
.
Remove
the valves
.
Remove
t
he
valve
stem
seals
.
Place
the
valves
in
the
proper
sequence
in
a
valve
stand
.
Valve
guides
2
.
Check
the valve
guide
wear
by
inserting
anew
valve
stem
into
the
guide
.
Measure
the play
using
a
dial
indicator
.
If
necessary,
replace the
valve
guides
.
Wear
limits
:
Inlet
valve,
max
play
. .
.
.
. . . . . . .
.
. . .
0
.15
mm
(0
.0059
in)
Exhaust
valve,
max
play
. . . . . . . . . . . .
0
.15
mm
(0
.0059
in)
3
.
Use
mandrel
p/n
5218
to
press
out the
valve
guides
.
Oil
the
new
valve
guides
externally
and
use
mandrel
p/n
884559
to
install
them
.
Press
down
the
mandrel
all
the
way
down
to
the
cylinder
head
.
Ream
the
valve
guides
if
necessary
.
Valve
seats
and
valves
4
.
Mill
or
ream
the
valve
seats
.
The
angle
(C)
should
be
45°
(for
2003T,
30°
for
the
inlet
valve)
.
The
sealing
surface's
width
(B)
should
be
1
±0
.1
mm
(0
.039±0
.0039
in)
.
Grind
the
valves
in
a valve
grinding
machine
.
The
angle
(D),
see
Tech
.
data
.
If
the
disc
thickness
after
grinding
is
less
than
1
.0
mm
(0
.039
in)
for
naturally
aspirated
engines
or 0
.8
mm
(0.031
in)
for
turbocharged
engines,
the
valves
must
bescrapped
.
Valves
with
bent
stems,
or
if
the
measurement
(A)
exceeds
2
.5
mm
(0
.098
in)
must
also
be
scrapped
.
Grind
the
valve
tip
towards
the
rockers
if
necessary
.
Lap
in
the
valves
using
valve
grinding
paste
and
check
the
contact
area
with
marking
dye
.