Pontiac Fiero 1988 Service Manual page 348

2.8 LITER V-6 ENGINE P CARLINE 6A2-23
LIFT
Intake 5.87 6.67
Exhaust 6.67 6.94
JOURNAL DIAMETER 47.44-47.49
JOURNAL CLEARANCE 026-.101
C r a n k s h a f t
MAIN JOURNAL
Diameter All 67.241-67.265mm
Taper 005 Max.
Out of Round 005 Max.
MAIN BEARING CLEARANCE 041-.081
MAIN THRUST BEARING CLEARANCE 054-.084
CRANKSHAFT END PLAY 06-.21
CRANK PIN
Diameter 50.784-50.758
Taper 005 Max.
Out of Round 005 Max.
ROD BEARING CLEARANCE 035-.095
ROD SIDE CLEARANCE 16-.44
V a l v e S y s t e m
LIFTER Hydraulic
ROCKER ARM RATIO 1.5:1
VALVE LASH 1-1/2 Turns From Zero Lash
FACE ANGLE 45°
SEAT ANGLE 46°
SEAT RUNOUT 05°
SEAT WIDTH
Intake 1.25-1.50
Exhaust 1.60-1.90
STEM CLEARANCE 026-.068
VALVE SPRING
Free Length 48.5
Pressure N-m
Closed 391 @ 40
Open 867 @ 30
Installed Height 40
DAMPER
Free Length 47.2
Approx. # of Coils 4