Unleaded Petrol - General Information And Usage; Air Cleaner Housing - Removal And Refitting; Fuel System - Opel Kadett Owner's Manual

4A•4 Fuel and exhaust systems - Carburettor models
Recommended fuel grade (Continued):
1.4 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6 litre models:
16SH engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16SV engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
*If the ignition timing is retarded by 3º, 95 RON unleaded (unleaded premium) petrol can be used (see Chapter 5 for details)
**After 5 tankfuls of unleaded fuel, one tankful of leaded fuel must be used
***If the octane rating plug is position correctly, 95 RON unleaded (unleaded premium) petrol can be used (see Section 2 for details)
Torque wrench settings
Inlet manifold nuts or bolts:
1.2 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 and 1.4 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Carburettor securing nuts:
1.2 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 and 1.4 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel pump to camshaft housing:
1.3 and 1.4 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 General information
The fuel system consists of a fuel tank
mounted under the rear of the car, a
mechanical fuel pump and a carburettor. The
fuel pump is operated by an eccentric on the
camshaft and is mounted on the rear of the
cylinder head. The air cleaner contains a
disposable paper filter
incorporates a flap valve air temperature
control system which allows cold air from the
outside of the car and warm air from the
exhaust manifold to enter the air cleaner in the
correct proportions.
The fuel pump lifts fuel from the fuel tank
via a filter and supplies it to the carburettor.
Excess fuel is returned from the anti-
percolation chamber to the fuel tank.
Warning: Many of the
procedures in this Chapter
require the removal of fuel lines
and connections which may
result in some fuel spillage.
Before carrying out any operation on the
fuel system refer to the precautions given
in Safety first! at the beginning of this
Manual and follow them implicitly. Petrol
is a highly dangerous and volatile liquid
and the precautions necessary when
handling it cannot be overstressed.
2 Unleaded petrol - general
information and usage
Note: The information given in this Chapter is
correct at the time of writing and applies only to
petrols currently available in the UK. If updated
information is thought to be required check
with a Vauxhall dealer. If travelling abroad
consult one of the motoring organisations (or a
similar authority) for advice on the petrols
available and their suitability for your vehicle.
1 The fuel recommended by Vauxhall is
shown in the Specifications, followed by the
equivalent petrol currently on sale in the UK.
2 RON and MON are different testing
standards; RON stands for Research Octane
Number (also written as RM), while MON
stands for Motor Octane Number .
3 If it is wished to run the vehicle on 95 (RON)
unleaded petrol the following operations must
first be carried out; this is necessary to avoid
detenation (knocking and pinking) which
could lead to possible engine damage.
element and
1.2 litre models
4 On 1.2 litre models produced prior to
February 1985, unleaded fuel can be used in
these models but note that to every five
tankfuls of unleaded fuel used, one tankful of
leaded fuel must also be used.
5 On later models, to allow the vehicle to run
on 95 (RON) unleaded petrol, the ignition
timing must be retarded by 3º (see Chapter 5
for details). Do not use 95 (RON) unleaded
petrol if the ignition timing has not been
retarded.
1.3 litre models
6 On models with 13N and 13NB engines, 95
(RON) unleaded fuel can be used without any
modifications.
7 On models with a 13SC engine, to allow the
vehicle to run on 95 (RON) unleaded petrol,
the ignition timing must be retarded by 3º (see
Chapter 5 for details). Do not use 95 (RON)
unleaded petrol if the ignition timing has not
been retarded.
1.4 litre models
8 All models can be run on 95 (RON)
unleaded
modification.
1.6 litre models
9 On models with a 16SH engine, to allow the
vehicle to run on 95 (RON) unleaded petrol,
the ignition timing must be retarded by 3º (see
98 RON leaded (4-star) or 95 RON unleaded (unleaded premium)
98 RON leaded (4-star) or 95 RON unleaded (unleaded premium)*
98 RON leaded (4-star) or 95 RON unleaded (unleaded premium)***
Nm
23
20
22
18
20
15
20
15
fuel can be used without
lbf ft
17
15
16
13
15
11
15
11
Chapter 5 for details). Do not use 95 (RON)
unleaded petrol if the ignition timing has not
been retarded.
10 Later models with a 16SV engine have a
fuel octane rating coding plug in the ignition
system wiring harness (see illustration). The
plug which is located on the right-hand side of
the engine compartment, is set during
production to give optimum engine output
and efficiency when run on 98 (RON) fuel. To
run the vehicle on 95 (RON) unleaded fuel,
make sure the plug is set to the "95" position
(95 should be visible on the side of the plug).
To reset the plug, release its locking clip then
remove the plug and rotate it through half a
turn (180º) before reconnecting it. Note: If
after making the adjustment, the octane rating
of the fuel used is found to be so low that
excessive knocking still occurs, seek the
advice of your Vauxhall dealer.
3 Air cleaner housing - removal
and refitting
Removal
1 Remove the centre retaining nut or bolt or
the three screws from the air cleaner cover.
2 Lift the air cleaner off the carburettor,
2.10 Octane plug in the "95" position -
later 1.6 litre models