Pontiac FIREBIRD 1972 Service Manual page 617

V-8 ENGINE 6-105
CYLINDER BLOCK
Material
............................................
Alloy Cast Iron
PISTONS
.......................
.
Clearance in Cylinder
0005" to 001 1 "
PISTON RINGS
Compression Rings
in^
Gap
.
...................................................
..
U m e r 010" 020"
'1
................................................... . .
Lower 010" 020"
Side Clearance
............................................ . .
Upper 0012" 0027"
...............................................
Lower 0012"
-
0032''
Oil Ring
............................................
.
Ring Gap 015"
-
055"
...................................... .
Side Clearance 002"
-
007"
PISTON PIN
............................................. . .
Diameter 9270" 9273"
................................... . .
Fit in Piston 00015" 00025"
..........................................................
Fit in Rod Press
CONNECTING ROD
Bearings
Material
..........................................
Moraine 100-A
.............................................
. .
Clearance 00 13 0035
End Play on Crankshaft
............................... . .
(Total for Two) 002" 006"
VALVE TIMING (In Crankshaft Degrees)
........................................................
Camshaft 3896929
Intake
Opens (BTC)
.................................................
28'
Closes (ABC)
..................................................
72"
Duration
......................................................
280"
.....................................
Lift
(@
Zero Lash) 390"
Exhaust
Opens (BBC)
.................................................
78'
................................................
Closes (ATC) 30
Duration
....................................................
288"
.....................................
Lift
( @
Zero Lash) 409"
-
VALVES
Diameter of Head
Intake
....................................................
1.7 15- 1.725
................................................
Exhaust 1.495. 1.505
Overall Length
Intake
........
A
.....................................
4.902 . 4.922
Exhaust
................................................
4.913.4.933
.....................................
Diameter of Stem 34 10..3 1 17
Stem to Guide Clearance
................................................
Intake .0010".. 0027"
............................................
Exhaust .0012".. 0029"
Valve Seat Angle
Intake
..................................................................
4C
Exhaust
..............................................................
4C
Valve Face Angle
Intake
..................................................................
45'
Exhaust
...........................................................
45'
CRANKSHAFT
No
.
of Bearings
.......................................................
5
............................
Main Bearing Type Moraine 100-A
.
................................................
Thrust Taken on NO 5
..............................
Crankshaft End Play .002".. 006"
Journal Diameter
.
.
...............................
No 1-2-3-4 2.4484" 2.4493"
NO
.
5
..........................................
2.4479"
.
2.4488"
Main Bearing Clearance
............................................... . . .
No 1 0008" 0020"
.........................................
. .
.
NO 2-3-4 001 1" 0023"
...............................................
. .
.
No 5 0017" 0033"
............................
.
Crankpin Diameter 2.099" 2.100"
FLYWHEEL AND SPROCKETS
Flywheel
Material
..................................................
Manual Cast Iron
....................................
Automatic Stamped Steel
...................................................... .
No of Teeth 166
Starter Motor Drive
No. of Teeth
..........................................................
9
Crankshaft Sprocket
............................
Material Hardened Sintered Iron
........................................................ .
No of Teeth 18
Camshaft Sprocket
Material- Aluminum Alloy with Nylon
Covered Teeth
. .....................................................
No of Teeth 36
. Timing Chain
..........
Link Type
.
Single Side Guide
. ..................................................
No of Links 46
....................................................
Valve Overlap 58' Harmonic Balancer
......................................
Cast Iron