Cylinder Block; Valve Train - Ford COUGAR 1968 Shop Manual

8-58 GROUP 8
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Engine
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On Thermactor eneines.the 289 V-8
NG.
1-3/4 Left Front View
FIG. 2-3/4
Right Front View
" ,
has drilled passages within the cylin-
der heads to distribute a i r from the
air pump to supply tubes in the exhaust
ports. The 302 V-8 has external air
manifolds fastened to each cylinder
head to distribute the air. The air
is injected under pressure and induces
combustion of the hydrocarbon and
carbon monoxide contaminants.
CYLINDER BLOCK
'The cylinders are numbered from
front to rear, on the right bank, 1, 2,
3 and 4 and on the left bank 5, 6,
7 and 8. The firing order is 1-5-4-2-
6-3-7-8.
The oil pump, mounted inside the
oil pan at the left front, is driven by
the distriblitor through an inter-
mediate drive shaft.
The oil filter is mounted on the
left lower front of the cylinder block.
The crankshaft is supported by
five main bearings. Crankshaft end
thrust is controlled by the flanges of
the No. 3 main bearing.
A2751.A
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The pistons have two compression
rings and one oil control ring. The
top compression ring is chrome-
plated and the lower compression
ring is phosphate-coated. The oil con-
trol ring assembly consists of a ser-
rated spring and two chrome-plated
steel rails. -
VALVE TRAIN
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The push rods are tubular steel
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with ball ends. The push rods supply
oil from a metering valve (disc) in
the valve. lifters through drilled
holes in the ball ends for indepen-
.dent lubrication of each rocker arm.
The rocker arms have a drilled
hole in the-push rod end for lubrica-
tion to the valve stem ends. They are
individually mounted on a stud that
is pressed into the cylinder head on
regular performance engines. A
fulcrum seat permits the rocker motion
and= a nut secures the rocker arm
on the stud. Side movement of the
rocker arm is controlled by integral
side rails which ride against the valve
stem.
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The camshaft is supfiorted by five
stepped diameter bearings pressed
into the block. A dowel is used for
positioning the camshaft sprocket
~ 2 7 1 4 - A
to. the camshaft. The camshaft is
driven by a sprocket and timing chain
in mesh with a sprocket on the crank-
shaft. Camshaft end play is controlled
by a thrust plate attached to the cyl-