1993 BUICK ROADMASTER radiator cap

When you decide it’s safe to lift the hood, here’s what
you’ll see:
Coolant recovery tank
Radiator pressure cap

How to Add Coolant to the Radiator
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2. Then keep turning the
pressure
cap, but now
push down
as you turn
it. Remove the.
pressure cap.
. -..- '. . . . ., 3. Fill the. radiator with
the proper mix, up to
the base of the filler
neck.
1. You can remove the radiator pressure cap when the
cooling system, including the radiator pressure cap
and upper radiator
hose, is no longer hot. Turn the
pressure cap slowly
to the left until it first stops.
(Don't press down while turning the pressure cap.)
If you hear a hiss, wait for that to stop. A hiss means
there is still some pressure left.

4. Then fill the coolant
recovery tank to
e “FULL COLD.”
5. Put the cap back on the
coolant recovery tank,
but leave the radiator
pressure cap off.
7. By this time the coolant ,level inside the radiator
filler neck may be lower.
If the level is lower, add
more
of the proper mix through the filler neck until
the level .reaches the base
of the filler neck.
6. Start the engine and let
it run until you can feel
the upper radiator hose
getting hot. Watch out for the engine fan.
8. Then replace the
pressure cap. Be
sure the arrows on
the pressure cap
line up like this.
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Add coolant mix at the recovery tank, but be careful not
to spill it.
You can be burned if you spill coolant on hot
engine
parts. Coolant: contains ethylene glycol,
and
it will burn if the engine parts are ho
e ~h. Dg -k SI coolant on a hot engr ---
Radiator -Pressure Cap , ..
,... , . ..
I
When you replace your raidiator$re&l ', cap,.an 'I
cap is recommended. ..
. I
.Thermostat
Engine coolant temperature is controlled by a thermostat
in the .engine coolant system. The thermostat stops the- ,
flow of coolant through.the radiator until the coolant
reaches a preset temperature.
When
you replace your thermostat, an,AC@ thermostat. .
is recommended.
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Cap.acities and, Specifications
CRANKCASE CAPACITY (With Filter) -
5.0 quarts/4.7 liters
TRANSMKSSIQN -
Drain and Refill - 1.0.0. pints/4.7 lifers
Overhaul
- 22.4 pints/f0.6.. liters
MAINTENANCE .ITEM PART NUMBERS3
Air Cleaner - A1.135C
Fuel Filtir
- GF580 ,
Oil Filter - PF2S
PCV Valve - C.V789C
’ PCV Filter - FB59
Radiator Cap - RC27
Spark Plug
- CR43TS, GAP 0.035”
1 8th Character of the Vehicle Identification Number.
2 Made in a GM plant in the United States,
3 Part: numbers are AC type.
4. Air Conditioning Refrigerant - Not all air conditioning refrigerants are the same. If the air conditioning system in your
vehicle needs refrigerant,
be- sure the proper refiigerant is used. If you’re not sure ask your Buick dealer;
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