Sunbeam ALPINE I SERIES: APLINE II SERIES, Workshop Manual

Page: 80 / 413

Page41
WSM.124
Section B (Engine)
Fig. 48.
E.N 16 identification marks
on
crankshaft
Top half bearings are replaced in a reverse manner
to that described for removal. The following points
should be noted:-
(a) Ensure that locating lips engage correctly iri
their respective recesses.
(b) Bearings are stamped according to their sizes
and on renewal the same size must be fitted
except when an underslze crankshaft is fitted.
In such cases the correct underslze bearings
must also be fitted.
(c) When replacing bearing caps particular atten­
tion should be given to cleanliness of the mating
faces and the oil return thrower recess in the
rear main bearing housing.
(d) Before replacing the front and rear main bearing
a very small quantity of Wellseal (or other non­
setting jointing compound) should be painted
onto the sides of the cylinder block recess Into
which the bearing caps locate. See fig. 32
under "OIL SUMP-to refit".
(e) Ensure that the front main bearing cap Is pulled
up against the timing case before fully tightening
the front main bearing cap bolts.
As each bearing is tightened up the crankshaft.
should be turned to ensure that It Is free. The
correct torque wrench figure for the main bearing
bolts is given In the Data Section under "Crank­
shaft".
Crankshaft end thrust
Crankshaft end thrust is taken by two semi-circular
steel washers having white metal thrust faces.
These faces are easily recognised by the two
vertical oil grooves cut across the white metal. The
washers are fitted with their white metal thrust
faces towards the crankshaft thrust faces and may be
removed by pushing them around the crankshaft
centre journal after taking off the centre main
bearing caps.
Endfloat of the crankshaft can be checked by using
feeler gauges as shown in Fig. 49. The correct
endfloat is given in the General Data Section under
''Crankshaft''.
-oos• (·127 mm.) oversize thrust washers are avail­
able for use with crankshafts which have had the
thrust faces reground at each end of the centre
main bearing journal.
Crankshaft-T!) remove
Remove engine from chassis.
Remove cylinder head, push rods and tappets.
Remove timing wheels and chain.
Remove engine front plate and sump.
Remove connecting rods and pistons.
Remove clutch (See Section D) and flywheel.
Remove main bearing cap bolts, and caps.
Lift out crankshaft.
Crankshafts having oval or scored journals should
be replaced by factory reground units. These are
available in the undersizes given in the Data Section