Installation manual
ENGINE
ADJUSTMENTS
NOTE:
WEST.ERBEKE
recommends
that
the
fallowing
engine
adjustments
be
performed
by
a
competimt
engine
mechanic.
TIW
information
below
is
provided
to
assist
the
mechanic.
CYLINDER
HEAD
BD,LT
TIGHTENING
SEQUENCE
SUB
BOLTS
Cylinder head
bolts
must
be
tightened
before
valve
adjustment.
TORQUING
THE
CYLINDER
HEAD
BOLTS
After
the
initial break-in period (approximately
50
hours),
the
cylinder head
bolts
should
be
re-torques.
Loosen the cylinder head
bolts
one
half
turn
in
the
order
shown.
(The
engine::
should
be
cold).
Then
tighten
the
bolts
in
the
sequence
shown
below.
One
bolt
at
a.
time.
Tighten
the
rocker cover stud securely. .
NOTE:
The
rocker
shaft
assembly
should
be
removed
for '
,
access
to
the
cylinder
head
bolts.
'
TORQUE
SPECIFICATIONS:
Bolts
#1,
#2
'14.4 -
21.7Ib-H
(2.0
-
3.0
Kg-m)
Bolts
#3,
#4, #5,
#6,
#7, #8,
-
54.2
-
51.4Ib-1t
(7.5
-
B.5
Kg-m)
,
ROCKER
SHAFT
HOLD-DOWN
BOLTS:
All
main
bolts
are
14mm
across
the
bolt head
fiats.
All
sub
bolts
are
12mm
across
the
bolt head
fiats.
Rocker shaft hold-down
bolts
are
l2mm
across
the
bolt
head
fiats.
Rocker Cover Hold Down
Cap
Nuts -
(IOmm
socket) (snug)
41
W\LVE
CLEARANCE
ADJUSTMENT
The
valve
clearance
must be
adjusted
every 500 operating
hours
or
whenever
the valve
rocker
is
abnormally
noisy.
Valve
adjustment
should
only
be
done
when the
engfue
is
cold.
Cold
engine
valve
clearance is
O.OIOin
(O.25mriJ.).
.
IT.
MARK
ON
PULLEY
~~~=O.lnOiin(0.25mm)
VALVE
CLEARANCE
'INSPECTION
TIMING
MARKS
1.
Pull off the
aIr
breather pipe
from
the'TOcker
cover
and
take
off therecker
cover
bolts.
Adjust the
valve
clearances
at
IDC
(Top
Dead
Ceriter)
for
each
cylinder
when
they
are
on
their compression
stroke.
2.
Adjust
all
valve
clearances
at
the
Top
Dead
Center
(TOC) of
the
compression
stroke
fore.l"'h
cylinder.
Take
_care
to
align
the
TOC
timing
mark
on'the
crankshaft
pnlley
exactly
with the'indicator mark
em
the
gear
case,
as
shown
on
the illustration
below.
If these
marks
are
not exactly
aligned,
the
valves
may
be
pushed
up
by
the
piston,
depending
on the position of the
carn
lobe.
3.
Confirm
that
the
valves
do
not
move
up or
down
when
the crankshaft i,turned
slightly
in either
direction
from
the
TOC
mark.
4.
Align
the
mark
(as
shown) for
IDC
for
the
No
..
1
,cylinder
on
its
compression stroke and
adjust
the
valve
o clearances
for
both intake,andexhaust
valves
for
the
No.1
cylinder with the engine
cold.