Cadillac 60 Series 1963 Shop Manual page 197

9-4
ENGINE MECHANICAL
The camshaft is supported by five steel-backed
babbitt bearings and is driven by the crankshaft
through a timing chain at the front of the engine.
Both the crankshaft and camshaft sprockets have
locating marks to provide correct valve timing
when the timing chain is installed. Wide camshaft
lobe design assures minimum lobe wear.
A drive gear, cast as an integral part of the
camshaft, meshes with the drive gear on the dis-
tributor drive shaft, Fig. 9-2. The distributor
drive shaft rotates in a clockwise direction when
viewed from above. This shaft also drives the oil
pump.
Hydraulic valve lifters are used to maintain
zero operating clearance throughout the valve
train. This arrangement assures quiet operation
and eliminates the need for valve tappet adjust-
ments. The lifters operate in guide holes drilled
in the cylinder block. The valve lifter plunger and
lifter body are selectively fitted in matched pairs.
The push rods ride in cups in the lifters and ex-
tend up through openings in the cylinder block and
cylinder heads to the rocker arms. The valve
operating mechanism is illustrated in Fig. 9-3.
A full flow type oil filter is attached to a sup-
port bracket mounted on a boss on the right hand
side of the engine front cover. The filter as-
sembly incorporates a throw away type filter
element and a spring loaded by-pass valve in-
tegral with the base casting to assure that the
engine oil supply is not interrupted if the element
should become clogged.
Oil capacity of the engine crankcase is four
quarts; five quarts if the filter is changed.
ENGINE LUBRICATING SYSTEM - (FIG. 9-4)
The oil pump is mounted in the right side of the
engine front cover. Oil enters the pump through a
screened intake pick-up pipe, and is pumped into
a passage in the filter support bracket, through
the oil filter, back down a passage in the support
bracket, through an angular passage in the cylin-
der block, into the right longitudinal header.
The right longitudinal header is intersected at
the rear of the engine by the vertical oil header.
The oil continues up the vertical header, the upper
end of which contains the oil pressure signal
switch, and into the connecting header. From the
connecting header, oil flows into the left longi-
tudinal header.
Both longitudinal headers feed several im-
portant points. One major passage from each of
the headers branches upward through the cylinder
block and cylinder head into the rocker arm shaft,
which is hollow and plugged at both ends to pre-
vent loss of pressure. Other passages direct oil
Rocker Shaft
Wire to Oil
Pressure Indicator
Oil Pressure
Signal Switch
Hex Head PlugJ
Connecting
Header
Vertical
Oil Header
Rear Camshaft
Bearing
Right
Longitudinal
Header
Oil Intake
Screen Assy.
Left Longitudinal
Header
Valve Lifter Oil
Supply Holes
Camshaft Oil
Supply Holes
Angular Passage
Oil Filter
Oil Pump
Crankshaft Oil
Supply Holes
Fig. 9-4 Engine Lubricating System