Chevrolet 1963 Corvette, Руководство по ремонту и настройке, Страница: 138 / 346

130 ENGINE AND ENGINE REBUILDING
sure should be taken with replacdment drain
cocks. A
Vs in. cast iron plug may be substi-
tuted only for an extremely short period of
time. Use only antifreezes and cleaners that
are recommended for aluminum cooling sys-
tems.
1984 and later models use an electric, sin-
gle-speed cooling fan mounted directly to the
radiator shroud. Fan operation is determined
by coolant temperature, operating only
enough to maintain engine coolant at or be-
low a preset maximum temperature. The
cooling fan is energized through a relay con-
trolled by a sending unit located in the right
cylinder bank. The fan only operates when
road speed is below 35 mph.
RADIATOR SUPPORT-UPPER
FRONT CROSSMEMBER MOTOR ASM
COOLANT FAN
Thermostatically controlled cooling fan—1984 and
later
Radiator
REMOVAL AND INSTALLATION
1963-68
1. Drain the radiator and cylinder block.
2. Remove upper and lower hoses and ex
pansion tank hose.
3. Remove radiator shroud(s).
4. Remove retaining clamps and carefully
pull radiator up and out of vehicle.
5. Reverse this procedure to install the ra
diator. Be sure that the two rubber cushions
are correctly seated under the radiator before
tightening.
6. Refill the cooling system and check for
leaks.
1969-74
1. Drain the radiator.
2. Raise the hood and insert a bolt in the
hole of the hood support. Remove the hood.
3. Remove the radiator inlet and outlet
hoses and, if applicable, the transmission
coolant hoses.
4. If applicable, remove the supply tank
hose at the radiator connection.
5. Remove the shroud to radiator support
bracket screws (the L88 engine does not have
a fan shroud).
6. Remove the shroud to radiator baffle
bracket screws and let the shroud rest on the
fan.
7. Remove the radiator upper support
bracket screws and carefully lift the radiator
from the car.
8. Install in the reverse order of removal.
1975-76
1. Drain the radiator and disconnect the
battery ground cable. Disconnect cooler lines
on automatic transmission models.
2. Remove the hood. This is a two-man
job.
3. Remove the radiator support brackets
attached to the fan shroud.
4. Remove the two front hood hinge bolts.
5. From inside the wheel well, remove
the six radiator side support bolts.
6. Remove the two bottom radiator sup
port bolts and the center brace.
7. Pull the radiator support forward and
use a clamp to retain it to the right hood
hinge.
1. Support
2. Bolt
3. Washer
4. Washer
5. Bolt
6. Washer
7. Plate
8. Radiator 9. Plug
10. Insulator
11. Plate
12. Bolt
13. Elbow
14. Bracket
15. Bracket
Big block and H.O. small block radiator mounting.
Most later models use this type of mounting re-
gardless of whether a H.D. radiator Is used