Oldsmobile GM DELTA 88 1974 - AIR CONDITIONING; CARBURETOR

Specification 1899-M. This coolant
solution provides freezing protection
to
-35°F., and it has been formulated to be
used for
two full calendar years or 24,000
miles, whichever first occurs, of normal
operation
without replacement, provided
the proper concentration of coolant is
maintained.
COOLING SYSTEM CARE
The radiator cap should not be removed to
check coolant level. Check coolant level
visually
in the 'see thru' coolant recovery
tank at least as frequently as engine oil
changes. Level should be at the "full cold"
mark on the recovery tank when the
system is cold. At normal operating
temperature the coolant shou Id be at the
"full hot" mark on the recovery tank. Add
sufficient coolant
to the recovery tank. Use
a
50/50 mixture of high·quality ethylene
glycol antifreeze and water for coolant
additions.
If regular additions are required,
see
your dealer for a cooling system check.
NOTE: If recommended quality antifreeze is
used, supplemental inhibitors or additives
claiming
to provide increased capability are
not necessary. They may be detrimental to
the efficient operation 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 radiator cap
for proper pressure holding capacity
(15-18 psi).
If replacement of cap is
required, use the special AC cap
designed for
coolant recovery systems,
specified for your model car.
4. Tighten hose clamps and inspect
all
hoses. Replace hoses whenever swollen,
checked or otherwise deteriorated.
5.
Clean frontal area of radiator core and
air conditioning condenser.
Replace hoses every 24 months or
24,000
miles or earlier if checked, swollen or
otehrwise deteriorated. Every two years or
24,000 miles, whichever first occurs, the
cooling system should be flushed and
refilled using
the following recommended
procedure:
1. Remove radiator cap when engine is
cool by:
• Slowly rotating the cap
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