3 If the air cleaner is retained by two wing
bolts, detach the hot air duct (where fitted)
and then lift the air cleaner body off the
carburettor (see illustrations).
4 With the air cleaner removed from the
engine, recover the rubber sealing ring if it
stayed behind on the carburettor flange.
Refitting
5 Refitting the air cleaner is the reverse
sequence to removal. Ensure also that the
rubber sealing ring is in position before
refitting the air cleaner.
6 If the air cleaner body incorporates an
adjustable air inlet spout, this should be
positioned adjacent to the exhaust manifold in
winter and away from it in summer.
Cooper S Mk III models
Removal
7 Undo and remove the two wing bolts and
washers then disconnect the engine breather
pipe and the throttle return spring. Lift off the
air cleaner body and recover the two rubber
sealing rings from the carburettor flanges.
Refitting
8 Refitting is the reverse sequence to removal
but ensure that the rubber sealing rings are in
position on the carburettor’s flanges.
1990-on Cooper models
Removal
9 Unscrew the two nuts securing the air inlet
duct to the rocker cover studs, then release
the clip and disconnect the duct from the air
cleaner (see illustration).
10 Unscrew and remove the nuts and
washers, then lift the air cleaner from the
carburettor and disconnect the hot air hose.
Remove the sealing ring from the carburettor
flange.
Refitting
11 Refitting is the reverse sequence to
removal but ensure that the rubber sealing
ring is in position on the carburettors flange.
1992-on models with
open-loop catalytic converter
Removal
12 Unscrew the two wing nuts, and lift the air
cleaner assembly away from the carburettor.
Recover the sealing ring from the carburettor
flange.
Refitting
13 Refitting is the reverse sequence to
removal but ensure that the rubber sealing
ring is in position on the carburettors flange.
4A•4 Fuel system - carburettor engines
2.2b Recover the sealing ring
2.3a If the air cleaner is retained by two
wing bolts detach the hot air duct . . .
2.3b . . . and lift off the air cleaner body . . .
2.1b . . . or the two wing bolts on later models 2.2a If the air cleaner is retained by a single wing nut, lift off the
top cover and withdraw the air cleaner body from the carburettor
2.9 Air cleaner and intake duct fitted to
1990-on Cooper models
1 Intake duct retaining nuts
2 Intake duct
3 Air cleaner mounting nuts
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