MG TF Series User Manual

__ ~ ~_~~~_~_TIIE ENGINE A
Oil feed
Remove the radiator as indicated in Sections D.2
or DD.2.
Remove
the dowel screws which secure the Inter-
mediate and rear bearings to the cylinder block.
Remove
the front thrust plate.
Remove
the camshaft by drawing it forward through
the front bearing. carrying the centre bearing with it.
This should be
removed from the camshaft when the
camshaft has been withdrawn far enough to bring the
centre bearing free from Its housing.
Replacement is carried out in the reverse manner
to that detailed for removal, but the following points
must be observed carefully :-
Ensure that all oilways are dear by removing the
blanking screws from the crankcase and testing the
oilways with compressed air.
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I
Holes for pin spanner
Fig. A.IS.
The relative positions
of the holes in the
camshah centre bearing.
The split centre bearing may easily be fitted Incor-
rectly. Ensure that the dowel hole in the bearing is in
line
with that In the crankcase and that the oilway
through the bearing Is correctly aligned with the 011
passage in the crankcase. When correctly fitted the
two pin-spanner holes in the side should be towards
t he front of the engl ne In the lower half of the bearing.
(See Figs.
A.18and A.19.)
It is essential to make quite sure that the dowel hole
in
the bearing Is exactly In register with the dowel
bolt hole In the crankcase before attempting to replace
the dowel bolt or it may sh ear t he edge of th e ho Ie in
the bearing.
After replacing and tightening the dowel locating the
centre bearing make sure that the camshaft is still free
to rotate. i.e. that the dowel bolt does not" bottom"
in its hole and so squeeze the bearing.
The whole of this operation Is more easily carried
out with the engine out of th e car and the cran kshaft,
flywheel, pistons and
connecting rods removed. Do
not forget to rewire the two bearing dowel bolts.
M.G. Midget. Issue 3 (H & E) 82966-1154
Seetion A.26
CAMSHAFT BEARINGS
When fitting new camshaft bearings It will be found
that the centre and rear bearings can be simply
fitted as
strict replacements. but when the front
bearing Is pressed I nto the housing this will need
reaming in line with the centre and rear bearings with
Tool No. T.I I I. The bearlng must have the lockl ng
nick
knocked Into the crankcase slot.
The end float of the camshaft is taken In both
directions by a plate which Is interposed between the
back of the camshaft chain wheel and the shoulder of
the camshaft front Journal.
Fig. A.19.
In thIs photograph the camshaft has been partly Inserted.
Note the position of the centre bearing.
Section A.27
TAPPET ADJUSTMENT
Remove the air deaner and rocker cover.
The tappet clearance should be set to ·019 in.
(·48
mm.) (on engines prior to No. XPAGjTD2j2-4116.
and on
engines from this number onwards the clear-
ance should be ·012 in. ('30 rnrn.) for both inlet and
exhaust valves with the engine hot. (See Section
A.4-4.)
If the engine Is cold an extra ·001 in. (025 mm.)
should be allowed. It is important that the clearance
is set when the tappet is exactly on the heel of the cam,
owing to the type of cam contour employed.
To reduce the number of times the engine need be
rotated, the table on page A.IS will be useful when
setting the tappets.
A.17
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MG TF Series Specifications

General

Brand	MG
Model	TF Series
Category	Automobile
Language	English