Chevrolet Light Duty Truck 1973, Service Manual

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R ADIATO R A N D GRILLE 13-1
RADIATOR AND GRILLE
C O N T E N T S OF T H IS SEC TIO N
Radiator........................................................................ 13-1
Grille............................................................................. 13-4
RADIATOR
SECTION 13
IN D E X
General Description.................................................... 13-1 Radiator Replacement (all except P30(32)
Service Procedure........................................................ 13-1 Chassis).......................................................................... 13-1
Maintenance............................................................... 13-1 Coolant Recovery System........................................ 13-2
Radiator Replacement (P30(32) Chassis).............. 13-2
GENERAL DESCRIPTION
P30 (32) Chassis is equipped with down-flow radiator, a
coolant recovery system and incorporates a drain cock.
All other models are equipped with cross-flow radiators.
The cross-flow radiator is similar to the down-flow
radiator except it is mounted sideways in the vehicle and
attached in the conventional manner.
With cross-flow radiator, coolant level should be a
maximum of three inches below the bottom of the filler
neck when cold on vehicles without recovery system.
On vehicle with a coolant recovery system, level in the
coolant tank should be at "Full-Cold" line when coolant
is cold. At normal operating temperatures, level will
reach "Full-Hot" line. The radiator should be completely
full at all times.
SERVICE PROCEDURES
M A IN T E N A N C E
For maintenance and checking cooling system, refer to
Section 6K, Engine Cooling System.
For cooling system capacities, refer to Section 0, General
Information and Periodic Maintenance.
Radiator R eplacem ent
(A ll Except P30 (3 2 ) Chassis) (Figs. 1, 3, 4 )
1. Drain radiator by removing radiator cap, inserting
one end of a 5-foot length of 3/8 inch tubing into
the filler neck until it touches the bottom of the
radiator and with any type of large syringe inserted
in other end of tube, initiate siphoning by
squeezing and and releasing the ball.
WARNING:
If you siphon coolant from the
radiator, do not use mouth to start siphoning
action. The coolant solution is POISONOUS
and can cause death or serious illness if
swallowed.
2. Disconnect upper and lower hoses and
transmission oil cooler lines if equipped.
3. Disconnect coolant recovery system hose
if equipped.
4. If vehicle is equipped with a fan shroud,
remove shroud attaching screw and
carefully hang shroud, over engine fan
assembly to provide clearance for radia­
tor removal.
5. Remove finger guard (G Series L-6
engine).
6. Remove mounting panel (retainers on G
Series) from radiator support. Remove
upper mounting pads.
LIGHT DUTY TRUCK SERVICE MANUAL