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6A5-26
1977 PONTIAC SERVICE MANUAL
Rocker Arm
Material
...................................................
Stamped Steel
Ratio
(301
Eng.)
...............................................
1.5
to
1
Ratio
(350
Eng.)
...............................................
1.6
to
1
Ratio
(400
Eng.)
..............................................
1.5
to
1
Rocker Arm Stud
...............................
Screwed into Head
Valve Spring Tension
(301
Eng.)
........................................
165
lb.
@ 1.29"
Valve Spring Tension Outer
(350-400
Eng.)
.................................
135
Ib. @
1.18"
Valve Spring Tension Inner
(350-400
Eng.)
...................................
97
Ib.
@ 1.14"
Installed Height
(301
Eng.)
..................................
1.66"
Installed Height
(350-400
Eng.)
...........................
1.54"
LUBRICATION SYSTEM
Type of Lubrication
Main Bearings
..................................................
Pressure
Connecting Rods
..............................................
Pressure
Piston Pins
......................................................
Splash
Camshaft Bearings
.........................................
Pressure
Lifters and Rocker Arms
................................
Pressure
Timing Gears and Chain
...........................
Metered Jet
Cylinder Walls
.....................................................
Splash
OIL PUMP
Type
.................................................................
Spur Gear
.............................................
Oil Pickup
Stationary Screen
..................
Pressure
(301
Eng.)
55-60
PSI @
2600
RPM
...........
Pressure
(350-400
Eng.)
38-42
PSI @
2600
RPM
.................................................................
Oil Capacity
5
Qts.
...............................................................
With Filter
6
Qts.
'400
engines with axle ratios above
2.93
to
1
and
syncromesh transmission applications have
60
pumps.
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