EMGlElE
Page
€2
GENERAL DESCRIPTION
0
The engine, which
is
inclined at
45
to the vertical from the centre
-
line of the
crankshaft,
is
a die
-
cast all
-
alloy, four c
y
linder with cast iron wet liners, in line,
twin overhead camshaft unit operating on the four
-
stroke cycle with cross
-
flow
cylinder
head. Pent roof combustion chambers are used with
4
valves (two inlet and
two exhoust)
having separate ports, per cylinder. The valves have replaceable guides
0
and seat inserts and ore at an inclusive angle of
38
.
They are operated by the cam
-
shafts acting directly on the cam followers (tappets), the camshafts being driven at
half
erigirie speed by o toothed belt. The camshafts end
flw;
is
taken by a thrust
washer at the rear end of each shaft. The toothed driving belt also drives the
auxiliary shaft, this
in its turn driving the oil pump and ignition distributor.
The crankshaft, of cast iron construction
and dynamically balanced, runs in
5
steel
-
backed leaded bronze lined main bearings, end float being controlled
by
split thrust
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