Chevrolet 1973 Overhaul Manual page 503

SPECIFICATIONS 44
NUMBER
Model (A) Automatic Trans.
(M) Manual Trans.
MV 7043022(A)
MV
7043021 (M)
MV 7043025(A) (M)
MV 7043026(A)(M)
MV
7043326(A) (M)C
2GV 7043105(A)(M)
2GV 7043103(A)(M)
2GV 7043108(A)(M)
4QJ 7043202(A)
4QJ 7043203(M)
4QJ 7043210(A)
4QJ
7043211 (M)
4QJ
7043208(A) (M)
4QJ 7043215(A)(M)
4QJ
7043200(A)
4QJ 7043216
4QJ 7043207(A) (M)
4QJ
7043507(A)(M)C
(*) Pump Rod Location: Inner.
C — California Only.
Vehicles
Auto.
All Trucks
2400t
t With vacuum advance
a. On high step
# 0 n M4, 1600 R P M for
both Auto, and Manual
(**) L/D Truck — Manual, Q-Jet — 1300 R P M w/o Vac. Advance
H /D Truck — Manual, Q-Jet — 1600 R PM with Vac. Advance
ADJUSTMENTS
Rochester Carburetors
Float Float Metering
Level Drop
1/4 .080
1/4 .080
1/4
.070
1/4 .070
1/4
.070
21/32 1 9/32
21/32 1 9/32
25/32 1 9/32
7/32
7/32
7/32
7/32
5/16
5/16
1/4
1/4
1/4
1/4
FAST ID LE (RU NNING ) RPM ADJUSTM ENT
Carburetors — Rochester
MV 4QJ
Man. Auto.
(M 4)#
1600t
a. a.
N O T E: For vacuum advance for 1 bbl. carburetors with C.E.C. valves — pull lead off of
cold override switch and ground it — this will energize the C.E.C. valve and provide
vacuum to the distributor,
TRUCKS
Choke Rod
(Fast Idle
Pump Rod
Rod Cam
2nd Step)
.245
.275
.350
.375
.375
.150
1 5/16
1 5/16 .150
1 7/16 .200
13/32(*) .430
.430
13/32(*)
.430
13/32(*)
13/32(*) .430
13/32(*) .430
13/32(*) .430
.430
1 3 /3 2 0
13/32(*) .430
13/32(*) .430
1 3 /3 2 0 .430
Man.
t1600 (1-1/4 S.A.E.) These settings are approximate
#
11600 (1-1/2 S.A.E.) RPM, as specified, — with
(**)
a.
Choke
Air Valve
Vacuum
Wind-Up
Break
.300
.350
.430
.430
.430
.080
.080
.140
1/2
.215
1/2
.215
1/2 .215
1/2 .215
1/2
.215
1/2 .215
11/16 .250
11/16 .250
11/16 .250
11/16 .275
2GV
Auto, and Manual
with low idle at 400/450
viscous clutch fans disengaged.
OVERHAUL MANUAL
Choke
Unloader
.500
.500
.600
.600
.600
.215
.215
.250
.450
.450
.450
.450
.450
.450
.450
.450
.450
.450