II. TECHNICAL INFORMATION
A.
Power Unit
ENGINE
The car has a
four
cylinder
In-line
liquid
cooled
engine
with
a roller chain driven overhead cam-
shaft.
The engine
block
is
cast
Iron and is canted
45
°
to
the
right.
The
light
alloy
cylinder
head Is
of
cross
flow
type,
Le_
with
inlet
ports
on one side
and
exhaust
ports
on the other. The
crankshaft
is
supported
in five main bearings and drives
the
oil
pump. The
ignition
distributor
is driven
directly
by the
camshaft.
The
air
intake
preheat·
er is
thermostatically
controlled.
Engine Oil
Check the
all
level at regular Intervals. Always
switch
the engine
off
first
and
allow
It
to
cool for
at
least
one
minute.
Do
not let the level fall
below the
lower
mark on the
dipstick
, nor fill
beyond the upper mark;
this
will cause exces-
sive oil
consumption.
The
distance
between the
upper
and
lower
marks corresponds
to
a volume
of
approx. 1
quart
(1
litre).
Top
up
with
oil
of
recommended grade as necessary.
After
check·
ing the
oil
and
topping
up as necessary, push
the
dipstick
all the way down and tighten the
cap securely.
The engine
all
should
be changed in accord·
ance
with
the
maintenance
schedule. The all
should
be changed at more frequent intervals,
particularly
in the case
of
the 900 Turbo, when
the car
Is
driven under severe service
condi·
tions.
The
latter
includes
dusty
conditions,
fre-
22
quent
tra
i
ler
towing
or
mountain
driving,
extensive
idling,
stop
·and·go driving, driving in
cold
climates
over repeated
short
trips
without
sufficient
engine warm·up.
Short
trip
cold c
limate
driving,
stop
and go driv·
ing and excessive
idling
result in moisture·acid
formation.
Oxidation
of
the oll is the
formation
of
varnish·like
substances
due
to
high heat gen·
erated
during
trailer
towing
or
prolonged high
speed
operation
in hot weather.
The use
of
additives in the
all
is not recom-
mended,
especially
in turbocharged engines.
NOTE!
Do
not
confuse
the
engine
and
transmission
drain
plugs.
Do
not
operate the engine
with
the
011
fill
cap
removed
or
loosely
Installed.
011
spilled
over the e
ngine
creates a
fire
hazard.
Oil Filter
The
oil
filter
should
be
changed
at
the same
time as the engine oil, in
accordance
with the
maintenance
schedule. Use Saab
Filter
number
9309576.
NOTEI Your
new
car
came
with
a "break·
In"
filter. The service
life
of
this
filter
Is
such
that
It
MUST be replaced at the
1000
mile
service.
Applya
little
oil
to
the rubber
gasket
on the
new,
·
filter, and
tighten
the
filter
by hand.
Air Cleaner
The
air
cleaner is
located
on
the
left·hand side
in the
front
part
of
the engine
compartment.
The
cleaner
cartridge
is replaceable and should be
changed
as
specified
in
the
maintenance
schedule. If the car is driven over
dusty
roads,
the cleaner should be changed
more
frequently.
The
cartridge
Is made
of
a
special
grade
of
pa·
per
which
may
not
be washed
or
moistened,
but
It may be cleaned
carefully
with
compressed air.
The
air
cleaner
housing
and
cover
should be
wiped
off
from
time
to
time.
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