Chevrolet BEAUVILLE SPORTVAN G10 SERIES, Service Manual

Page: 337 / 350

SPE C IFIC A TIO N S 6
ENGINE:
G E N E R A L D A T A :
T ype
D isp lacem en t (cu. in.)
In Line
2 5 0
V8
307
350
H orsep ow er @ rpm
110
@
3 8 0 0 ^
1 3 0
@
4 0 0 0
175
4 0 0 0
Torque @ rpm
185
@
16 0 0
2 3 0
@
2 4 0 0
2 9 0
@
2 4 0 0
Bore
3-7/8
Stroke
3.53 3.25
3.48
C om pression R atio
Firing Order_______
3.5:1
1-5-3-6-2-4
1-8-4-3-6-5-7-2
C Y L IN D E R BORE:
Diam eter
3.8 7 4 5
3 .8 7 7 5
3 .8 7 4 5
3 .8 7 7 5
3.9995
4 .0 0 2 5
O ut o f
R ound
P rod uction .0005 Max.
.001 Max.
Service
.0 0 2 Max.
Production
Taper
Thrust
Side .0 0 0 5 Max.
R elief
Side .0005 Max. .001 Max.
Service .005 Max.
PISTON:
Clearance
P rod uction .0 0 0 5 -.0 0 1 5
Service
.0025 Max.
.0 0 0 7 -.0 0 1 3
.0 0 2 7 M ax.
PISTON RING:
Clearance
G roove
P rod uction
T op .0 0 1 2 -.0 0 2 7
2nd .0 0 1 2 -.0 0 3 2
.0012
.0 0 3 2
Service Hi Lim it Production + .001
P rod uction
Gap
T op . 010-.020
2nd
.
010-.020
.013
.025
Service Hi L im it P rod uction + .01
G roove
Clearance
P rod uction .005 Max.
.0 0 2 -.0 0 7
Service Hi Lim it P rod uction + .001
Gap
P rod uction
.0 1 5 -.0 5 5
Service
Hi L im it P rod uction + .01
PISTON PIN:
Diam eter
.9 2 7 0 -.9 2 7 3
Clearance P roduction
.0 0 0 1 5 -.0 0 0 2 5
Service
.0 0 1 -Max.
F it in R od
.0 0 0 8 -.0 0 1 6 Interference
C R A N K SH A FT:
Main
Journal
D iam eter
All
2 .2 9 8 3
2 .2 9 9 3
Taper
O ut o f
Round
P roduction
# 1 -2 -3 -4
2 .4 4 8 4 -2 .4 4 9 3
#5
2 .4 4 7 9 -2 .4 4 8 8
.0 0 0 2 Max.
Service .001 Max.
P rod uction .0 0 0 2 Max.
Service
.001 Max.
T yp e
In Line
V8
D isplacem ent (cu. in.) 2 5 0
307 350
H orsepow er 110
1 3 0 175
C R A N K SH A FT:
Main
Bearing
Clearance
Production
All
.0 0 0 3
.0 0 2 9
# 1
.0 0 0 3 -.0 0 1 5
# 2 -3 A
.0 0 0 6 -.0 0 1 8
#>
.0 0 0 8 -.0 0 2 3
Service
# l - . 0 0 2 Max. O thers .0 0 3 5 Max.
Crankshaft End Play .0 0 2 -.0 0 6
Crankpin
D iam eter
1.999
2 .0 0 0
2 .1 9 9 -2 .2 0 0
Taper P roduction .0 0 0 3 Max.
Service
.001 Max.
O ut o f
Round
P roduction .0 0 2 Max.
Service
.001 Max.
R od Bearing
Clearance
Production
.0007
.0 0 2 7
.0 0 0 7 -.0 0 2 8
Service .0 0 3 5 Max.
R od Side C learance
.0 0 9 -.0 1 4 | .0 0 8 -.0 1 4
CAM SHAFT:
Lobe
Lift ± .0 0 2 "
Intake .2 2 1 7 .2 6 0 0
Exhaust .2 2 1 7 .2 7 3 3
Journal Diam eter 1 .8 6 8 2 -1 .8 6 9 2
Cam shaft R unout .015 Max.
V A L V E SYSTEM:
Lifter
Hydraulic
Rocker Arm R atio 1 .7 5 :1 | 1.5 0 :1
Valve Lash
Intake
One Turn D o w n From
Zero Lash Exhaust
Face A n gle (Int. & E xh.) 45°
Seat A ngle (Int. & E xh.) 46°
Seat R u n ou t (In t. & E xh.)
.0 0 2 Max.
Seat Wid th Intake 1 /3 2 -1 /1 6
Exhaust 1 /1 6 -3 /3 2
P roduction Int. .0 0 1 0 -.0 0 2 7
Stem
Clearanc
Exh. .0 0 15-.00321 .0 0 1 0 -.0 0 2 7
Service
Hi Lim it P rod uction + .001 Intake;
+ .0 0 2 E xhaust
Valve
Spring
(Outer)
Free Length 1 .9 0 2 .0 3
Load
lbs.
@ in.
Valve
Closed
54-64
@ 1 .6 6
7 6 -8 4
@ 1 .7 0
Valve
O pen
180 -1 9 2
@ 1.27
194 -2 0 6
@ 1.25
Installed Height
± 1 / 3 2 "
1 -2 1 /3 2 1 -2 3 /3 2
Valve
Spring
(Inner)
Free Length N .A .
Pressure
lbs.
@ in.
Closed N .A .
O pen N .A .
Installed H eight
+ 1 /3 2 " N .A .
Damper Free Length
N .A .
1.94
A pprox. # o f C oils N .A . 4
C H E V Y V A N S H O P M A N U A L