Engine
MISSION
CONTROL
SYSTEM
S-
except
California
VALVE
ROCKER
CLEARANCE
Checking
Disconnect the purge pipe (1) from the r
ocker
cover
and
unscre
wt
he retaining
Fig 4 screws (2). Release the collar and seal (3) from the rocker cover. Remove the
rocker cover
(4) and insert a 0·010 in (0,25 mm) feeler gauge (5) between the
va
l
~e
r?cker arms and valve stems.
The
gauge should be a sliding fit when the
engine
IS cold. Check each clearance in the following
order:
You
and
each subsequent owner of the
car
are urged to
make
sure
that
the
recommended
maint
enance procedures are
carr
ied out at the intervals specified .
For
the emiss ion
cont
rols to continue to function effectively, it is strongly
recommended
that
you
arrange
for regular maintenance inspections to be carried
out by y
our
authorized Austin
MG
Dea
ler or by any other qualified service
outlet which regularly performs such service on British Leyland cars.
Check
No.1
valve with
No
.8
fully open. Check
No.8
valve with
No.1
fully
open
.
3 6
6"
3
5 '" 4 4 " 5
2 7 7 2
Adjusting
Slacken
the
adjusting screw
locknut
(6) on the opposite
end
of
the
rocker
arm
and
rotate
the screw (7) clockwise to decrease or
anti
-clockwise to increase
the
clearance. Retighten
the
locknut
when
the
clearance is correct, holding
the
screw
against
rotatio
n with a scre
wdr
iver. Re-check the cle
ara
nce.
Refitting
Clean the rocker cover sealing face
and
fit a new gasket (8) to the rocker cover.
Refit the cover, the brackets,
and
connect the pu rge pipe.
You have been provided with a Passport to Service which contains a facility to
record that maintenance has been carried
out
at the rec
ommen
ded mileages.
You should have the maintenance rec
ord
completed by y
our
authorized Austin
MG
Dealer (or by
other
dealer or
station
equipped to render such service) at
the regular mileage intervals indicated in the Schedule.
The
Handboo
k and
Passport to Service should be
handed
to subsequent purchasers of the vehicl
at the time of sale so
that
the maintenance instructions are available
and
that
,.
the record of maintenance
can
be continued.
You are also urged to study with care the section covering
'MALFUNCTION
IDE
NTIFICA
T
IO
N'. Study of this section will be of aid to you in detecting
possible malfunctions of the emission con
tro
ls so that necessa ry service measu res
can immediately be
tak
en.
IMPORTA
NT
Your
atten
tion is
par
ticularly drawn to the following:
1.
2.
Fig. 4
The basic engine tuning
data
will be f
ound
on the emission control inf rrnat ion
label located in the front of the engine
com
partment.
General
This section gives a general
description
evaporative emission control
their individual component .
It
mu t b emphasized that cor rect ca
rbur
etter
adjustment
and
ignition timing which hav been pre-set at the factory are essential
for the efficient functioning of th xhau t emission controls. Should it become
necessary to check or adjust th e ttings this work
shou
ld be carried out by
an authorized Austin
MG
or riti h Leyland
Dea
ler who has the specialist
O
rt
n
;n
n
"H
~
1"'\
t
~1"'\rl
t
r
~;1"'\
;1"'\
O'
tn
lInrl
rt
a Ir
t
h~c~
arl'llct
n"
~
1"'\tc
their individual component . Jt n 1I t b mphasized
that
correct ca
rburetter
adjustment
and
ignition timing whi h h v been pre-set at the factory are essential
for the efficient functioning of th xh ust emission controls. Should it become
necessary to check or ad
just
th ttings this work should be carried out by
an authorized Austin MG or Briti h Leylan d
Dea
ler who has the specialist
equipment
and
training to undertake these adj
ustm
ents.
2
Fig. 4
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