1992 VOLKSWAGEN TRANSPORTER overheating

Downloaded from www.Manualslib.com manuals search engine
CONTROLS AND EQUIPMENT

Auxiliary
heater*
To
switch heater on
•
Press
rocker switch D on rent.
• Select desired heat
with
knee -
The
green heater in-operatior. =~~" _
comes
on.
Regulating
heat

The
heat is infinitely adjustable
with
:~e knob A.
After heater has been switched on it takes

a
little
time before heat can be
felt.

When
the set temperature is reached, the green in-operation lamp becomes darker.

The
temperature is then held fairly constant by the heater thermostatically.
w-^
=
jxiliary heater works independently of
me .ehicle heating. It is supplied
with
fuel
I: rr the vehicle tank.
He suxiliary heater can be used continu­

es
. when on the move or stationary.
|r~? current is supplied from a 2nd battery.

r~T
air flows from the outlets behind the p*.er's seat.
k- the summer the heater blower can be

(sed
to circulate the air in the vehicle with-
it.: heat.
5v. itching on and off and regulating the aux-
tey heater are done from the control panel
r the dash panel.
-
a
timer* is
fitted
(see page 65) the control

panel
is located on the roof cross member I the passenger compartment.
A
BCD

[J70~-T971

Control
elements

A
- Regulating heat output
B
- Overheating indicator (red)

C
- Heater in-operation lamp (green)
D
-
Rocker
switch for switching heater on
and
off and operating blower without heat.
www.vwT4camper.info - a useful website for owners and enthusiasts of VW T4 Transporter Campervans

Downloaded from www.Manualslib.com manuals search engine
DRIVING
TIPS

• As the factory installation of a towing bracket includes the modification of the

cooling
system, this should also be done
when service installing a bracket. Other­

wise
overheating may occur when the en­ gine is pulling hard (mountains, high ambi­
ent temperature, heavy trailer loads).

Certain
vehicle versions can be equipped

with
a heavy-duty cooling system ex fac­

tory,
even though the vehicle is delivered

without
a towing bracket. Details can be ob­
tained from Volkswagen dealers.
• Volkswagen dealers have all the
necess­
ary information on the installation of towing
brackets
and the
fitting
of a heavy-duty

cooling
system. The installation should
therefore be done by them.
• If, when towing a trailer for commercial
purposes,
the permissible
total
weight of

vehicle
and trailer - also
with
passenger
cars
- exceeds 3500 kg, it is necessary to in­
stall and use a tachograph in most European

countries.
Operations
instructions

• When inserting the 13 plug
into
the
socket
on the vehicle, the ribbed sleeve on
the plug must be turned fully to the
right.

The
lid of the socket then engages over the
boss
on the
sleeve.

• If the
traffic
behind the trailer cannot be
seen
properly
with
the standard rear view mirrors, additional outside mirrors will be

necessary.
Both outside mirrors must be

fitted
on folding arms and adjusted to give
a
good view to the rear at all times.
• Pitching movements between towing
vehicle
and trailer can be reduced by heavy-
duty springs and shock absorbers on the rear axle. If these springs and shock ab­

sorbers
have not already been
fitted
at the
factory, they can, in many
cases,
be servi­

ce-installed
by a Volkswagen dealer.
• Pitching and snaking movements can
also
be reduced by stabilizers which can be
obtained from and
fitted
by Volkswagen
dealers
in most European countries. • The permissible trailer weight11 - see

page
151 -must not be
exceeded
on any
ac­

count.
• When towing a trailer in mountainous re­
gions,
note
that
the trailer weights given ir
the "Technical data" are only valid for gradi­ ents up to 10 or 12 %. If the trailer weigh'
is
below the permissible maximum a corre­
spondingly steeper gradient can be

climbed.

• The given trailer weights are only appli­
cable
for altitudes up to 1000 m above see
level.
As the engine
output
and thus the
climbing ability drops due to the decreasing
air density, the weight of vehicle and trailer must also be reduced by 10 % for eacr

further
1000 m or part thereof.
1 The permissible vehicle/trailer weight
con­
sists
of the permissible
total
weight of tow­ing vehicle plus the permissible
total
weight
of trailer. If the permissible trailer load is to be
fully utilized it may be necessary to reduce
the weight of the towing vehicle appropriate­ ly. The towing vehicle must however not be
lighter than the trailer.
82
www.vwT4camper.info - a useful website for owners and enthusiasts of VW T4 Transporter Campervans

Downloaded from www.Manualslib.com manuals search engine
GENERAL
MAINTENANCE
Filling the
tank

The
filler neck is on the left-hand side of the

vehicle.

The
tank holds about 80 litres. Trouble-free
refuelling
calls
for correct
use
of filler
nozzle.

•
Insert
nozzle
fully into tank neck and do not
tilt
it.

On
vehicles with a catalytic converter the

spring-loaded
flap below the filler opening
must be
pressed
open with the filler
nozzle.

This
should
also
be noted when using a pet­ rol can to
fill
the tank. As soon as the
correctly
oper­

ated
automatic
nozzle
switches

off for the
first
time,
the
tank
is
full.

Do not try
then
to put
more
fuel
in
because the expansion space in
tank
will
be
filled
- the
fuel
can
then
over­

flow
when
it becomes
warm.

After
filling tank, screw cap on tightly and
lock
it.

Note

•
Never
drive
until
the
fuel
tank
is completely
empty
on vehicles
with

a catalyst. The
irregular
fuel
supply
can cause misfiring. This
allows
un-
burnt
fuel
into
the exhaust system.
Which can cause
overheating
and damage to the catalyst.

•
When carrying a spare can of petrol on the vehicle, official regulations must be ob­
served.
For safety reasons we advise you not to carry a spare can of petrol. In an
acci­

dent the can could become damaged and petrol
escape.

55
www.vwT4camper.info - a useful website for owners and enthusiasts of VW T4 Transporter Campervans

Downloaded from www.Manualslib.com manuals search engine
GENERAL
MAINTENANCE

Checking
coolant
level

The
expansion tank
is in the
engine
com­
partment on the bulkhead
-
see Fig.

The
correct coolant level
is
essential
to
the satisfactory operation
of
cooling system.
For
this reason, the coolant level should
be

checked
regularly,
and
this
is
best done
when refueling.

The
level
can
only
be
checked properly
when engine
is
not running.

The
coolant level must be between the MIN
and
MAX marks
on the
expansion tank
when engine
is
cold
and can be
slightly
above
the MAX mark when
it
is warm.
When
the
coolant level
is too low on ve­

hicles
with
an automatic coolant level moni­
toring device,
it is
indicated by the coolant
temperature/coolant level warning lamp
flashing continuously (see page 47).

Coolant
losses

Coolant
loss normally indicates leaks in the

system.
In
this
case
the
cooling system
should
be checked by a Volkswagen dealer

without
delay.
It is
not sufficient merely
to

add
coolant.
In
a
sealed system
losses
can only occur
if

the boiling point
of
the coolant is exceeded
as
a
result
of
overheating, and coolant
is

forced out
of
the system.
Overheating can occur
if:

• the flow
of
cooling air is reduced, e.g.
by
a
radiator
muff,
very
dirty
radiator fins
(leaves,
dust, insects)
or
additional driving
lights
in
front
of
the cooling air intake.
• the boiling point
of
the coolant has been lowered by an incorrect mixture
-
see previ­

ous
page.
•
the
radiator
fan is not
working
- see
"Fan"
on next page
-
or, • the vehicle
is
driven up
a
long hill
in too

low a gear
with
engine speed very high and
at very high ambient temperatures
-
see
"Fan"
on
next page.
If
the
cause
of the
overheating cannot
be

found
and
eliminated, contact
a
Volks­
wagen dealer
as
soon
as
possible other­

wise
serious damage may
be
done
to the
engine.

Topping
up
coolant
Switch
engine
off
and let
it
cool down. Then

cover
expansion tank cap
with
a
cloth and

turn
cap carefully
to
the
left
and remove.

Attention
Do
not
remove
expansion
tank

cap
when
engine
is
hot
-
Danger
of scalding.

System
is
under
pressure.

If, in an
emergency only water
can be

added,
the
correct mixture concentration must be restored
with
the specified coolant
additive (see previous page)
as
soon
as
possible.

•02
www.vwT4camper.info - a useful website for owners and enthusiasts of VW T4 Transporter Campervans

Downloaded from www.Manualslib.com manuals search engine
TECHNICAL
DESCRIPTION

Attention
Due to high temperatures which
can occur in the catalytic
con­

verter in very unfavourable conditions, the vehicle should not be parked so that the catalyt­
ic converter can come into
con­

tact with inflammable materials.
If whilst driving, the engine mis­
fires, loses power and runs uneven­ ly,
this
could be due to a fault in the ignition system. In a
case
like this,
unburnt fuel can enter the exhaust
system and then escape to atmos­
phere.
Furthermore, the catalytic
converter could become damaged
due to overheating. The vehicle
speed must be reduced immediately
and the defect should be eliminated
at the nearest Volkswagen dealer.
Note
Even
in the
case
of a
perfectly working
ex­

haust emission control system there can, under certain engine operating conditions,
be
a
sulphur-type exhaust
smell.

This
depends upon
the
sulphur content
in
the fuel being
used.
Quite often this can
be
remedied
by
select­
ing another brand
of
fuel
or,
filling
up
with

unleaded premium petrol.
50
kW
Diesel
engine

An
oxidation catalytic converter
is
fitted
in

the exhaust system
of
this Diesel engine.
It
consists
of
a steel-cased ceramic body
con­

taining
a
multitude
of
longitudinal
passages

which are vapour coated
with
platinum. The catalytic converter largely eliminates
the
unpleasant smelling hydrocarbons
and

turns carbon monoxide
into
carbon dioxide.
In addition
an
exhaust
gas
turbocharger
forces
air
into
the
cylinder, causing
the
en­
gine
to
operate
with
a high
excess
of
air. The
fuel which is then injected in is so complete­ ly
burnt,
that
under
full
load soot is no longer
visible
in the
exhaust.

As
the
diesel engine catalytic converter
does
not get
hotter than
a
conventional
ex­
haust system, under normal conditions
there
is
nothing special
to be
noted, this

applies
also
to
parking.
The system does
not
require any additional

care
or
maintenance.
Activated
charcoal
filter*

Vehicles
with
a
regulated catalytic
con­

verter,
in
Germany
and
other export countries, have
a
fuel system which
in­

cludes
an activated charcoal
filter
(petrol va­pour accumulator).
The activated charcoal
filter
prevents
the

fuel vapour escaping
into
the
atmosphere.

These
vapours
pass
into
a
container filled

with
activated charcoal and, when
the en­
gine
is
stationary they
are
accumulated
in

the activated charcoal. When
the
engine
is
running,
the
container
is
automatically
ventilated
by
opening
a
valve
and the
fuel
vapour
is fed
into
the
engine
for
combus­
tion.
The system works completely automati­

cally
and
is
maintenance-free.
138
www.vwT4camper.info - a useful website for owners and enthusiasts of VW T4 Transporter Campervans