catalytic converter VOLKSWAGEN TRANSPORTER 1990 T4 / 4.G Owners Manual

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VEHICLE
OPERATION

WARNING continued
•
The permanently engaged allwheel-
drive
will
provide
good
performance on relatively wet or slippery
roads.
Be
sure
to use these features and advantages
wisely. Do not let the excellent traction
which your VW
SYNCRO
offers lead

you
to underestimate the difficulties
and risks involved in negotiating wet or
slippery
roads. Always drive defen­

sively
and adapt vehicle operation and
driving speed to road and
traffic
condi­

tions.
Driving Off-Road
WARNING
The Vanagon/Transporter
Syncro
is not an off-road or all
terrain
vehicle. Use of
this or any other vehicle under off-road
conditions
requires special skills and knowledge. The off-road operation of
this or any other
vehicle
can
lead
to per­
sonal
injury.

•
Driver and all
passengers
must
wear

safety belts at all times.

•
Keep your thumbs and fingers on
the outside of the steering wheel.
Potholes
or rocks can
jerk
the
wheel

from your grip; it really hurts if a spoke
catches
you on the way around.

Off-Road
Driving
Driving off-road places extra demands
on

your vehicle and on you, the driver.
If
under

exceptional
circumstances
you
judge
it

safe
and
appropriate
to
leave
the
paved highway,
first
make sure
that
your vehicle

is
in top
mechanical condition. Make cer­

tain
that
all
vehicle systems
are
function­ ing normally,
in
particular,
for
example,

that
the engine, especially the cooling
sys­

tem,
is
operating properly and
that
trans­
mission,
brakes and steering are function­ ing normally. Tires must have adequate

tread,
be
free
of
damage
and be
adequately inflated.

Before
driving over
difficult
terrain, such as

mud,
sand,
water, snow
or
steep
slopes,

we recommend engaging
the
differentia lock*
at low
speed.
Important
information
regarding
the
differential lock
is on
page

33/34.

Whenever
you
operate your
car you
should
be
well
and fit, but
your physical

and
mental condition
are
especially
im­

portant
when driving
off
the road.

As
a
general rule
you
should
go
only where others have gone before.

Always
obey applicable
Federal,
State
and
local regulations
and
above
all re­

spect
and protect the environment. Do
not

scar
the
land, avoid unnecessary wheel
spinning and other driving behavior which

will
create
ruts
and destroy vegetation.
Be

careful when parking and when standing

with
a hot
engine. The catalytic converter

with
which your vehicle
is
equipped devel­

ops
very high temperatures which can set
dry grass and brush
on
fire. Respect
the

wildlife, leave animals
to
themselves
and

do not destroy their areas
of
refuge. Above
all,
be
considerate and operate your vehi­

cle
sensibly and safely. Nature
is a
natural
resource
which belongs
to
all
of
us.
'where applicable


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VEHICLE CARE
FUEL SUPPLY
Your vehicle is equipped with a catalytic converter and requires unleaded fuel.
For maximum engine performance, un­
leaded fuel with an octaine rating of 91
RON,
which corresponds to an anti-knock
index (AKI) of 87, is recommended.
Do not use leaded gasolines.
Deposits from leaded gasolines deacti­
vate the catalytic converter and thus
defeat its purpose to control exhaust emis­

sions.

Unleaded fuels may not be available
outside the continental USA and Cana­

da.
Therefore, we recommend you do not take your vehicle to areas or coun­
tries where unleaded fuel may not be
available. Octane rating
Octane rating indicates a gasoline's ability to
resist detonation. Therefore, buying the cor­
rect octane gas is important to prevent en­
gine "knock", which reduces performance and may cause engine damage.
Under high load operating conditions, un­
leaded premium gasoline may be used.
The 91 RON octane rating which you will find above the filler neck is based on the re­ search method. The AKI octane rating unsu-
ally displayed on USA gasoline pumps is
calculated as follows: Research octane number plus motor octane number, divided
by 2.
Regular fuels have an octane rating ranging
from 91 to 95 RON (Research Octane Number) or 87 to
91
AKI.
Do not use any fuel with octane ratings
lower than 91 RON or 87 AKI.
Gasolines containing alcohol
Gasoline containing alcohol is available at
gas stations in some areas. The gas pump may not be labeled to identify that alcohol
is present in the gasoline. If it is labeled, it
may not identify what amount and type(s)
of alcohol are used. We recommend you
use quality gasoline that is NOT blended
with alcohol. The use of fuel containing alcohol can cause loss of fuel econorr
and driveability and performance pre:

lems.
If these problems are experience:
we recommend you switch to anothe brand of gasoline.
Seasonally adjusted gasoline
Many gasolines are blended to perfor-
especially well for winter or summer drl
ing.
During seasonal change-over, wl
suggest that you fill up at busy gas statior I
where the seasonal adjustment is mo-r likely to be made in time.
Gasoline additives
A major concern among many aut: manufacturers is carbon deposit build-i:
caused by the type of gasoline you use.
Although gasolines differ from onr manufacturer to another, there is a cor-
mon thread. All gasolines contain props'
ties that can cause deposits to collect ad essential engine components, specificali
fuel injectors and intake valves. Althoug- most gasoline brands include additives tc
keep engine and fuel systems clean, the;,
are not equally effective.


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VEHICLE CARE

CORROSION
PROTECTION

The transmission,
front
and rear axle
assembly
surfaces have been treated at
the factory
with
a wax based coating for protection against corrosion. However, we
recommend to have the and the underside
inspected twice a year for any damage to
the protective coating preferably before and after the winter
season.
Have
neces­

sary
repairs done as soon as possible.
See
your dealer for correct procedures
and materials.

WARNING
Do not
apply
additional
undercoating

or
rustproofing
on or
near
the
exhaust
manifold,
exhaust
pipes,
catalytic

converter
or
heat
shields.
During
driv­
ing, the substance used for
under-

coating
could
overheat
and cause a

fire.

Engine
Compartment
When washing the engine compartment, only use commercially available grease
cutting solvents made especially for this
purpose.
Carefully follow directions
print­

ed
on the container by the manufacturer.
WARNING

Never
use gasoline,
Diesel
fuel
or sol­

vents
which
could
damage
rubber
parts
or
painted
surfaces and could
cause a
fire.

Chassis

The lower body shell of your Volkswagen
is
thoroughly protected against corrosion. However, it is recommended to have the
underside inspected twice a year. Any de­
tected damage to the undercoating, due to road hazards, should be repaired prompt­
ly. Oil based protective sprays must not be

applied.
Only tar or wax based anticorro-

sion
protectors are compatible
with
the
factory applied undercoating. Before ap­ plication, road
dirt,
salt spray deposits and
oily substances must be removed.

Whenever
the lower body
shell,
axle, transmission or engines assemblies have been repaired, the lost anti-corrosion
coating of the affected surfaces should be
reapplied.

Your
Volkswagen dealer has the appro­ priate materials, the necessary equipment
and is familiar
with
the application proce­
dure. Therefore, any additional corrosion protection work should be performed by a

Volkswagen
dealer.
Body
cavity sealing

All
body cavities which could be affecte: by corrosion have been given a thorouc"
protection at the factory.

This
sealing does not require any inspe:
tion
or additional treatments. If any wa should seep out of the cavity when tN
ambient temperature is high, it can M removed
with
a plastic scraper and -.
suitable solvent. Be sure to observe a
safety and environmental regulations.
94


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VEHICLE CARE
ENGINE OIL
Engine oil consumption t 3 normal for your engine to consume oil.

T-Q
rate of oil consumption depends on
re quality and viscosity of
oil,
the speed at
Mich
the engine is operated, the climate,

read
conditions as well as the amount of : ution and oxidation of the lubricant.

Because
of these variables, no standard
•e:e
of oil consumption can be esta-
:
shed,
but drivers should expect an in­
creased
oil consumption at high speeds
s.nd when the engine is new.
• The
engine
in your
vehicle
depends
on oil to
lubricate
and cool all of its
mov­

ing
parts.
Therefore
the
engine
oil
should be checked
regularly
and
kept
at
the
required
level.
•
Make
it a
habit
to
have
the
engine
oil

level
checked
with
every
fuel
filling.

• Lack of
sufficient
engine
oil may
lead

to
severe
engine
damage.

• The oil pressure
warning
light
is not
an oil
level
indicator.

Always
heed
WARNINGS
on
page
97.
The
engine oil dipstick and the oil filler

neck
are located behind the license plate

lid.

Checking the
engine
oil
level

The
best time to check the engine oil level
is
when the oil is warm.
• Turn off the engine.
• To get a true reading, the vehicle should

be
on level ground. After turning off the en­

gine,
wait a few minutes for the oil to return
to the crankcase.
• Flip license plate down.
• Pull out dipstick and wipe it clean
with
a

rag.

• Reinsert dipstick; push it in all the way. • Pull dipstick out again. The oil level is
correct if it is between the "max" and "min" marks on the dipstick.
• If oil level is below "min" mark, or not
showing on dipstick, add oil immediately.
• Make sure
that
the dipstick is com­
pletely in.
Adding
engine
oil • Unscrew cap from oil filler neck.
• Pull extension tube out of filler neck as
far as it will go.
• Only add the amount of oil needed. The
difference between the "min" and "max" marks on the dipstick is about
1
U.S. quart
or
1
liter. Always select a quality oil
with
the
correct specification. See "Lubricants" on
page
85.
Do not exceed the MAX
marking.

Otherwise,
the excess oil may be drawn in
through the crankcase breather into the exhaust system. The oil would then burn in
the catalytic converter and cause dam­
age.

•
Push
in the extension tube, replace fil­
ler cap and hand tighten securely.

WARNING

The oil
filler
cap
must
be secure to avoid oil spill causing
fire
hazard.


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DO-IT-YOURSELF-SERVICE

EMERGENCY
STARTING

Starting by
pushing
or towing

Vehicles
with
Automatic Transmission
cannot
be started by
pushing
or
towing.

Vehicles
with
Manual
Transmission
must
not
be started by
pushing
or
towing.

Damage to the catalytic converter and/or
other parts of the vehicle may result. Starting
with
jumper
cables

WARNING
•
Always shield your eyes and avoid
leaning over the battery whenever
pos­

sible.

•
Do not allow battery acid to contact

eyes
or
skin.
Flush any contacted area

with
water
immediately.

•
Improper use of booster battery to
start a vehicle may
cause
an
explosion.

•
Vehicles batteries generate explo­

sive
gases.
Keep sparks, flame and lighted cigarettes away from batteries.

•
Do not charge a frozen battery; allow
it to thaw out first. Gas trapped
in the ice may cause an explosion.

•
Do not try to jump start any vehicle

with
a low electrolyte level in the bat­ tery.

•
The voltage of the booster battery
must also have a 12-volt rating. The

capacity
(Ah) of the booster battery

should
not be lower than
that
of the
dis­

charged
battery. Use of batteries of dif­
ferent voltage or substantially different

Ah
rating may cause an explosion and
personal
injury.
•
Applying
a
higher
voltage
booster

battery
will
cause
expensive
damage
tc

sensitive
electronic
components,
such
as
relays,
radio,
etc...

•
Vehicle
with
discharged
battery: turn off

lights
and
accessories,
move
lever
to N or

P
(Automatic
transmission)
or into
Neutra

(Manual
transmission)
and set
parking

brake.

Always
heed WARNINGS on page 97.


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TECHNICAL
DESCRIPTION

EMISSION
CONTROL SYSTEM
In the
interest
of
clean
air Pollution of our environment has become

a
problem
that
is of increasing concern to
all of us. We urge you to
join
us in our ef­

forts
for cleaner air in controlling the pollu­
tants emitted from the automobile.

You
can make a significant contribution to
keeping our air clean by:
• Always using lead free gasoline.
• Not
letting
your vehicle idle
unnecessa­

rily.
• Following the recommended preven­
tive maintenance schedule contained in
the maintenance booklet.
• Not removing or altering the emission
control system.
• Taking the precautions described
below to prevent damage to the emission
control system in your vehicle.

Volkswagen
warrants the Emission
Con­
trol
System in your new vehicle under the
terms and conditions set
forth
in the War­ ranty booklet.

Your
Volkswagen is equipped
with
such a
system,
which contains the following major components.
Catalytic
converter

The catalytic converter is an efficient
"clean-up"
device
built
into
the exhaust system of the vehicle. The catalytic conver­
ter burns the undesirable pollutants in the exhaust gas before it is released
into
the
atmosphere.
The
exclusive
use of
unleaded
fuel
is cri­
tically
important
for the
life
of the
cataly­

tic
converter
and
proper
functioning
of
the
engine.

The
catalytic
converter
will
be
perma­
nently
damaged
by
•
exceeding
the "max"
marking
when

adding
engine
oil (see
page
99)
• push or tow
starting
your
vehicle

•
misfiring
of the
engine

•
turning
off the
ignition
while
the

vehicle
is
moving
or
•
other
unusual
operating
conditions. Do not
continue
to
operate
your
vehicle

under
these
conditions, as
otherwise

fuel
can
reach
the
catalytic
converter.

This could
result
in
overheating
of the
converter,
requiring
its
replacement.

For
maintenance intervals refer to your
Maintenance booklet.

Oxygen
Sensor (OXS)
The oxygen sensor, installed in the exhaust manifold, continuously
senses

the oxygen content of the exhaust and

signals
the information to an electronic
control
unit.

Carbon
canister

The vehicle is equipped
with
a carbon canister to prevent fuel vapor from
esca­
ping
into
the atmosphere.
The vapor is passed
into
the carbon canister, where it is retained when the
engine is turned off. When the engine is running, a valve allows air
into
the canister,
and the fuel vapor is passed to the engine
for combustion.
The system does not require any main­
tenance.

144


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ALPHABETICAL
INDEX

page

Accessories
122

Air
cleaner 103

Air
Conditioner 54 All-wheel-drive 75
Alternator warning
light
44

Ashtrays
64
Assist
handles and coat hooks ... 67
Automatic safety belts 14
Automatic Transmission 35
Automatic Transmission Fluid .... 102 Auxiliary Heater 57, 60
Battery 109
Battery charging 110

Brake
fluid reservoir 108

Brake
warning
light
43
Brakes
29

Break-in
period 69

Bulb
chart 130

Bulb
replacing 130
Buzzer
7,35

Capacities
147

Catalytic
converter 144

Central
locking system 8
Cigarette lighter 63
Child
safety 15

Chime
7,35

Cleaning
products 89

Climate
controls 51
Clock
41 page

Coolant
temperature gauge .... 41

Cooling
system 104

Consumer
information 152
Corrosion
protection 94

Cruise
control 49

Curtains
27

Cup
holder 66

Dashboard
4

Data
146
Defogging/defrosting 52 Differential lock 33

Dimensions
148
Do-it-yourself service 123

Doors
9

Economically
driving 72

Electric
windows 12

Emergency
equipment 70
Emergency
flasher 46

Emergency
starting 136

Emergency
towing 138

Emission
Control System 144
Engine
code letter 151

Engine
compartment lid 97

Engine
cooling 41,104
Engine
exhaust 144

Engine
number 151

Engine
oil changing 100
pace

Engine
oil checking 9?

Engine
oil grades 9E

Expansion
tank 105

Fan
41, 10c

Folding
table 65

Foreign
country driving 120 Front seats 20

Fuel
economy 72

Fuel
gauge 42
Fuel
injection 142

Fuel
supply 86

Fuel
tank 85

Fuses
12E

Gas
Station
Information
156

Gasoline
additives 86
Gearshift lever 32

Glove
compartment 64
Headlight dimmer and flasher .... 48 Headlights 13C
Headlight adjustment 134
Headlight switch 46

Head
restraints 19 HeatingA/entilation 51
High beam 45,48
Horn 4
Identification label and number ... 151
Ignition/steering lock 38
Indicator lights 43


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