Downloaded from www.Manualslib.com manuals search engine type cooling system is used on all
1973 Camaro air conditioned and
heavy duty cooling systems. It has
been filled at the factory with a
high-quality, inhibited, year-around
coolant that meets the standards
of General Motors Specification
1899-M. This coolant solution pro
vides freezing protection to
-20 0 F
(-32°F in Canada), and it has
been formulated to be used for
two full calendar years
or 24,000
miles, whichever first occurs, of
normal operation without draining,
provided the proper concentration
of coolant
is maintained.
• For Recovery Systems Only
Check the coolant level visually
at the see-through coolant reser
voir at each oil change interval
while the engine
is at normal
operating temperature. Do not
remove radiator cap except for
draining and refilling the system.
Coolant level should be at the
"Full Hot" mark on the reservoir.
If system is checked cold, the
coolant level should be at the
"Full Cold" mark on the reser
voir.
• For Other Than Recovery Sys
tems-Check the coolant level
only at oil change intervals, un
less there
is evidence of leaking
or overheating. Do not remove
radiator cap when solution
is
hot and under pressure. Coolant
level should be a maximum of
three inches below the level of
the filler neck when the engine
is cold.
• All Systems-Add a 50/50 mix
ture of high-quality ethylene
glycol antifreeze and water if
coolant additions are necessary.
Do not overfill.
NOTE: If recommended quality
antifreeze
is used, supplemental
inhibitors or additives claiming to
53
provide increased cooling capabil
ity are not necessary. They may be
detrimental to the efficient opera
tion of the system, and represent
an unnecessary operating expense.
Every year, the cooling system
should be serviced
as follows:
1. Wash radiator cap and filler
neck with clean water.
2. Check coolant for proper level
and freeze protection.
3. Pressure test system and radia
tor cap for proper pressure hold
ing capacity (15 psi).
If re
placement
of cap is required,
use the proper AC cap specified
for your car model.
4. Tighten hose clamps and inspect
all hoses. Replace hoses when
ever checked, swollen
or other
wise deteriorated.
5. Clean frontal area of radiator
core and air conditioning con
denser.
Downloaded from www.Manualslib.com manuals search engine Every two years or 24,000 miles,
whichever first occurs, the cooling
system should be drained by si
phoning
and refilled as follows :
1 . Run engine, with radiator cap
removed , until normal operat
ing temperature
is reached
and upper radiator
is hot (in
dicates thermostat
is open).
2. With engine stopped, insert
one end
of a 5-foot length of
¥s inch tubing into the filler
neck until it touches the bot
tom of the radiator.
3. Insert any type of large sy
ringe into the open end of the
tubing and initiate the siphon
ing process by squeezing and
releasing the ball.
4. Completely drain radiator
coolant through the siphon
tube.
(To speed this opera
. tion the drain plugs in block
can also be removed.)
4A. For recovery systems use
same method to siphon all
coolant from reservoir.
5. Remove tubing (install block
drain plugs, if removed) and
add sufficient water to fill
system.
6. Run engine, drain and refill
the system, as described in
steps
1 thru 5, a sufficient
number of times until the
drained liquid
is nearly color
less.
7. Allow system to drain com
pletely and install block drain
plugs, if removed.
8. Coolant Recovery Systems
Only
- Flush reservoir with
clean water,
and drain.
54
9. Add sufficient ethylene glycol
coolant, meeting
GM Specifi
cation 1899-M, to provide
the required freezing and
corrosion
protection-at least
a
44 percent solution (-200
F). For both standard and
recovery systems, fill radiator
to the cold fill level
(3" be
low bottom
of filler neck).
For recovery systems, add
sufficient coolant to reservoir
to raise level to
"Full Hot"
mark.
I O. Run engine, with radiator cap
removed, until normal oper
ating temperature
is reached.
(Radiator upper hose be
comes
hot.)
11. With engine idling, add cool
ant to within 1 V:z " below bot
tom of filler neck and install
radiator cap making certain
arrows line
up with overflow
tube.
