Pontiac FIREBIRD 1972 Service Manual page 613

V-8 ENGINE 6-101
................................
Camshaft (with A.I.R.) 6262809
Intake
Opens
......................................................
25" BTC
..................................................
Closes 237" ATC
......................................................
Duration 262"
.....................................
Lift
(@
Zero Lash) 388"
Exhaust
O ~ e n s
................... ................................
234" BTC
- '
....................................................
Closes 36" ATC
......................................................
Duration 270"
.......................................
Lift (@ Zero Lash) 405
.......................................
Valve Overlap 686" inches
VALVES
..........................................
. -Exhaust 1.495" 1.505"
Stem Diameter
........................... . .
Intake & Exhaust 3410" 3417"
Face Angle-Intake & Exhaust
..............................
45"
Seat Angle-Intake & Exhaust
................................
46"
Stem to Guide Clearance
................................................ . .
Intake 0010" 0027"
........................................... . .
Exhaust 0015" 0032"
Springs (Force @ Length)
............................
.
Valve Closed 56-64 lbs
@
1.27"
......................
. Valve Opened 180- 192 lbs
@
1.27"
VALVE TRAIN
Lifter-Leak Down Rate
.....................
12-65 seconds
Material-Intake
....
Alloy Steel with Aluminized Face
with 50 lbs
.
load
and Flash Chrome Plate Stem
-Plunger Travel
................................ .
0338" (Gage)
-Exhaust
..........
21-4N Steel with Aluminized Face Pushrod-Material
..................................
Steel Tubing
and Flash Chrome Plated Stem -Length
..........................................................
9.61"
Lash-Intake
&
Exhaust
....................
One Turn Down
Rocker Arm-Material
..........................
Stamped Steel
from Zero Lash -Ratio
..............................................................
1.75.1
......................
Head Diameter-Intake
1.7 15"
-
1.725"
V-8 ENGINE WRENCH TORQUE SPECIFICATIONS (EXCEPT 307 ENGINE)
Torque in Ib
.
f t
.
unless otherwise specified
.
APPLICATION TORQUE APPLICATION TORQUE
Bolt-Main Bearing Cap to Block
..............................
100
Bolt-Rear Main Bearing Cap to Block
....................
120
Bolt-Cylinder Head
....................................................
95
Bolt-Flywheel to Crankshaft
....................................
95
Nut-Connecting Rod Bearing Cap
............................
43
Bolt-Oil Pan to Block
.............................................................
Front Bolts 12
.............
Rear Bolts (through reinforcement straps)
20
Bolt-Oil Pump to Block
..............................................
30
.......................
Bolt-Harmonic Balancer to Crankshaft 160
Bolt-Exhaust Manifold to Head
................................
30
Bolt-Intake Manifold to Head
..................................
40
Bolt-Camshaft to Sprocket
........................................
40
..........................................
Nut-Rocker Arm to Stud 20
......................................................
Stud-Rocker Arm 50
Spark Plug to Head
..................................................
15
....................................................
Bolt-Rocker Cover 8
307 ENGINE WRENCH TORQUE SPECIFICATIONS
Torque in Ib
.
f t
.
unless otherwise specified
.
APPLICATION TORQUE APPLICATION TORQUE
.
.
..................................
Crankcase Front Cover
80 lb in
.
.
Flywheel Housing Cover
................................
80 lb in
. .
Oil Filter Bypass Valve
..................................
80 lb in
. .
..................................
Oil Pan (To Crankcase)
80 lb in
. . .............................................
Oil Pump Cover
80 lb in
..........................................
. .
Rocker Arm Cover 45 lb in
......................................................
Camshaft Sprocket 20
.
.
Oil Pan (To Crankcase)
..................................
65 lb in
Clutch Pressure Plate
..................................................
35
......................................................
Distributor Clamp 20
........................................................
Flywheel Housing 30
......................................................
Manifold (Exhaust) 20
..........................................................
Manifold (Inlet) 30
................................................................
Water Outlet 20
................................................................
Water Pump 30
Connecting Rod Cap
..................................................
45
..
..........................................................
Cylinder Head : 65
Main Bearing Cap
......................................................
75
......................................................................
Oil Pump 65
......................................................................
Flywheel 60
......................................................
Harmonic Balancer 60
..............................................
Temperature Send Unit 20
......................................................................
Oil Filter 25
....................................................
Oil Pan Drain Plug 20
....................................................................
Spark Plug 15