Chevrolet 70 1969 Series, Shop Manual

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RADIATOR AND SURGE TANK 13-3
Figure 3 — Radiator Installed (C onv. “J " M o d e ls
Except
J V 7 0 M o d e ls)
7. Remove upper mounting bolts and rubber
bushings.
8. To remove radiator and support assembly,
tilt assembly forward and lift assembly out of
vehicle.
9. To remove radiator core assembly from
support assembly, remove cap screws from fan
shroud and remove fan shroud. Remove cap
screws attaching radiator core assembly to sup­
port assembly and remove core assembly.
Installation (Refer to Fig. 4)
1. Position radiator core assembly in support
assembly and secure with cap screws.
2. Install fan shroud and retain with cap screws.
3. Carefully place radiator and support assem ­
bly in vehicle. Be sure components of lower mount
are properly positioned.
4. Assemble radiator upper mounts and com­
plete assembly of lower mounts.
5. Connect upper and lower coolant hoses to
radiator.
6. Install air conditioning or power steering
cooling coils (if removed).
7. Install electrical components on radiator
and connect throttle linkage to radiator support.
8. Fill cooling system and inspect system for
leaks.
PRESSURE RELIEF VALVE
Rubber Bushing
Mounting Bolt Nut
Radiator Core and Support
ALL TILT CAB MODELS
CORE UPPER MOUNTINGS
Control Island
Frame Bracket
Steel Shims
U-Bolt ^ S p a c e r 12
* J q ' d >
I
Radiator
Support
Mounting
Bracket
Assembly
Speed Nut
Spring
Nut
Flat Washer
ALL TILT CAB MODELS (EXCEPT TM)
CORE LOWER MOUNTINGS
Pressure relief valve assembly, whether sep­
arate or integral with radiator filler cap, incor­
porates a pressure valve and a vacuum valve.
When pressure in system reaches valve setting
(see "Specifications" at end of this section), pres­
sure valve opens and steam or vapor is allowed to
escape. As liquid in system cools it contracts; this
allows pressure valve to close and also creates
a partial vacuum in system. Atmospheric pressure
Cap Unit
Vacuum
Valve
Pressure Valve
Pressure
Valve
Spring
Figure 4 — Radiator U p p e r a n d Low er
Supports
(M o d e ls TM, TG, TJ70 a n d TM 80 )
Figure 5 — C o m b in a tio n Pressure Relief V a lv e a n d Filler C a p
CHEVROLET SERIES 70 -80 H EAVY DUTY TRUCK SH O P M A N U A L