Pontiac FIREBIRD 1972 Service Manual page 651

ENGINE COOLING AND LUBRICATION
6A-3 1
FAN USAGE
USAGE
ENGINES
6 CYL.
307 V-8
350 400 2 Bbl.
&
455 Wl2 Bbl.
455 Exc. H.O.
&
400 4 Bbl.
455 H.O.
DIA. X PITCH
F
-
-
-
-
-
1
2
3
4
5
/
8
1
4 Blade CROSS F A N
1
l 8 " x TAPER
OPTIONS
WIO AIC
AIC
4 Blade CROSS F A N 16-112" x 1-518"
-
7 Blade THERMO CLUTCH 18" x TAPER
4 Blade CROSS F A N 19" x 2-5/16"
5 Blade FLEX F A N 18-718" x 2-1 14"
7 Blade FLEX 19;1 14" x 2-1 14"
6
7
1
9
1
7
Blade THERMO CLUTCH
1
18"
x
2-114''
WIO
AIC
A/C
W/O
A/C
7 Blade THERMO CLUTCH
19-1 12" x 2-1 14"
7 Blade THERMO CLUTCH
.
18-718" x 2-114"
Fig. 6A-39 Fan Usage
STD
HEAVYDUTY
STD
HEAVY DUTY
B G X
-
-
-
-
-
-
-
-
-
SERIES
-
-
-
-
-
-
-
A
exc.
1
-
9
-
10
-
-
-
-
GTO
1 1 -
- 2
-
-
-
-
-
AIC
GTO
-
-
-
-
3 3 4 3 4 4
4 4 4 4 4 -
7 6 6 6 6 6
4 4 4 4 4 -
-
7 6 6 6 6 -
4 4 4 -
-
7 6 6 -
W/O
AIC
STD
HEAVY DUTY
AIC
W/O
AIC
STD
HEAVY DUTY
A/C