GMC 4000 Series Service Manual page 327

Sec. 6K
Page 316
ENGINE COOLING SYSTEM
DRIVE BELT REPLACEMENT
On some vehicles, several accessories may
be driven from multiple groove crankshaft pulley,
and the replacement of any one inside drive belt
will make it necessary to remove all the outside
belts first.
NOTE: Instructions for replacing power steer­
ing drive belt are given in "POWER STEERING"
The cooling system capacities listed in "Anti-Freeze Chart" and Model Capacity
Chart" below apply to vehicles with standard equipment only. Because of some optional
equipment which may be used, such as engine oil cooler, air conditioning, larger engine,
water filter, increased cooling, etc., the capacity of cooling system will vary. For the
purpose of obtaining an accurate cooling system capacity before adding anti-freeze to an
optional equipped vehicle, it is recommended that the cooling system be first replenished
until visible in filler opening and then drained into a graduated container of which the
contents can be measured.
Refer to "Anti-Freeze Solutions" under "Cold Weather Operation" in this section.
QUARTS OF PERMANENT (ETHYLENE GLYCOL)
ANTI FREEZE REQUIRED AT INDICATED TEMPERATURE
rEMPERATURE (°F.)
CAPACITY (QTS.) +1 0
4 3 .5 ...................................... 11.0
3 6 .0..................................... 9.0
3 5 .0..................................... 9.0
8.5
3 4 .0.....................................
3 1 .5..................................... 8.0
2 9 .0 ...................................... 7.5
1 6.0..................................... 4.0
4.0
1 5 .0.....................................
13.0..................................... 3.5
ENGINE
V-6 En g in es....................
In -Lin e En g ines . ............
*Tw o therm ostats used on 305C engine with air brakes, and all 351C and 351M engines.
G M C S E R V I C E M A N U A L
SPECIFICATIONS
0 - 1 0 - 2 0 - 3 0
14.5 16.5 19.0 20.5
12.0 14.0 15.5 17.0
11.5 13.5 15.5 16.5
11.5 13.0 15.0 16.0
15.0
10.5 12.0 14.0
10.0 11.0 12.5 14.0
5.5 6.5 7.0 7.5
5.0 6.0 6.5 7.5
5.0 6.0 6.5
4.5
ENGINE THERMOSTATS
NUMBER MEAN TEMP.
USED
.......
1*
.......
1
ENGINE OVERHEAT SW ITCH
SW ITCH C O N TAC TS C LO SE A T :
Gasoline En g in es............................................................................. 225°F.
Diesel En g in es................................................................................. 215°F.
(SEC. 9B) of this manual. Refer to AIR COM­
PRESSOR AND GOVERNOR (SEC. 6T) for adjust­
ment and replacement instructions for air com­
pressor drive belts.
IMPORTANT: When replacing dual or triple
drive belts, it is essential that entire set be re­
placed at same time. Belts are available in match­
ed sets only.
COOLING SYSTEM CAPACITIES (Q TS )
TRUCK SERIES
LV, LA 4000....................................................... ............................
DLV, DLA4000; SM 5500 . ............................... ............................
EM 4500..............................................................
ES4500; ES5 5 00 ...............................................
PS4500...............................................................
EG, SG5500; EG6500 ...................................................................
SS5 5 0 0 ............................................................... .............................
EM 5500; EM 6500............................................. ............................
SM 6500..............................................................
STARTS TO FULLY OPEN
OPEN (°F.)
(°F.)
180 177-183
195 192-198
INCLUDING HEATER
QTS.
43.5
35.0
............................ 31.5
............................ 16.0
............................ 13.0
29.0
15.0
36.0
............................. 34.0
(°F.)
202
217