Chevrolet 10 1971 Series Chassis Service Manual page 448

SPECIFICATIONS 8
E
Type
N
G
Displacement
I
N
Horsepower
E
COMPRESSION
SPARK Make &
PLUG Number
Gap
D
Point Dwell
I
S
Point Gap
T
R
A rm Spring Tension
I
B
U Condenser
T
O
Ti ming
R
©
©
Fan and P/S
DRIVE
BELT
A /C Compressor
A IR CLEAN ER
VALVE LASH
IDLE
Syn.
RPM
Auto.
©
FUEL
Pressure in lbs.
PUMP
Volume
©
CRANKCASE VENTILATION
(D PSI at Cranking Speed, throttle wide open - Maximum variation, 20 PSI between cylinders.
(2) 6 Cylinder engine - Rotate cam lubricator 180° at 12,000 mile intervals - Replace at 24,000 m ile intervals.
8 Cylinder engine - Change cam lubricator end for end at 12,000 m ile intervals - Replace at 24,000 mile intervals.
(3) At idle speed with vacuum advance line disconnected and plugged. On Step Van vehicles, use number two cylinder
and tim ing tab on bottom of cover.
(4) CAUTION:
also acts as a flame arrestor in the event the engine backfires. Because backfiring may cause fire in the engine
compartment, the a ir cleaner should be installed at all times unless its removal is necessary for repair or m ain­
tenance services.
Paper Element Type - F irst 12,000 m iles, inspect element for dust leaks, holes, or other damage and replace if
necessary.
m iles. Element must not be washed, oiled, tapped, or cleaned with an a ir hose. If so equipped, replace P.C.V.
breather filte r every 24,000 m iles (do not attempt to clean). If so equipped, clean wire mesh frame arrestor every
12,000 miles
O il Bath Type - The oil level in the oil bath a ir cleaner reservoir should be checked every 12,000 m iles and suf­
ficient S.A.E. 50 oil added when temperature is above freezing or S.A.E. 20 oil added when temperature is below
freezing. Adding oil and servicing the cleaner w ill vary greatly, depending upon operating conditions.
O il Wetted Paper Element With Polyurethane Wrap - This dual element a ir cleaner has extremely long life and
w ill not require replacement for 50,000 to 100,000 m iles under norm al operating conditions.
of the polyurethane wrap should be done at 24,000 m iles under norm al highway or city-type operation. Service
under off-the-road or extremely dusty operations should be performed at 12,000 m iles or less depending upon
severity of operating conditions
(5) See "TUNE-UP" section.
© Replace filter element located in carburetor inlet every 12 months or 12,000 m iles, whichever occurs first.
ENGINE
TUNE-UP CHART
In Line
250 292
145 165
(I) 130 psi
Standard
AC-R46TS AC-R44T
Cold AC-R45TS AC-R43T
4 °B 4°B
Syn.
Auto. 4°B
4°B
50 lb. Min. 75 ± 5 lbs. (Used) 125 ± 5 lbs. (New) Using Strand Tension Gauge
65 lb. Min. 95 ± 5 lbs. (Used) 140 ± 5 lbs. (New) Using Strand Tension Gauge
550 550
500 500
3-1/2 to 4-1 /2
B - B.T.D.C.
In addition to its function of filtering a ir drawn into the engine through the carburetor, the air cleaner
If satisfactory, rotate element 180° from original installation position.
SECTION 6
V8
307
200
215
150 psi
AC-R45TS AC-R45TS
AC-R44TS AC-R44TS
.035"
31°-34°
.016" (Used) .019" (New)
19-23 ounces
.18-.23 microfarad
4°B 4°B
8°B 4°B
See Note ©
Hydraulic - 1 turn down from zero lash
600
550
550 500
5 to 6-1/2
1 pint in 30-45 seconds @ cranking speed
Replace at 24,000 m iles
350 402
250
300
AC-R44TS AC-R44TS
AC-R43TS AC-R43TS
4°B
8°B
8°B 8°B
600
600
550 600
7 to 8-1/2
Replace element at 24,000
Cleaning and oiling
10-30 CHEVROLET TRUCK SERVICE MANUAL