1993 BUICK ROADMASTER Owners Manual

To check the fluid hot or cold:
0 Park your vehicle on a level place.
Place the shift.lever in “P” (Park) with the parking
brake applied.
0 With your foot on the brake pedal, move the shift
lever through each gear range, pausing for about 3
seconds in each range. Then, position the shift lever
in
“P” (Park).
Let the engine run at idle for 3 minutes or more.
Then, without shutting
off the enpine, follow these
steps:
1. Pull out the dipstick and wipe it with a clean rag or
paper towel.
2. Push it back in all the way, wait 3 seconds and then
pull it back out again.
3. Check both sides of the dipstick, and read the lower
level. The fluid level must be in the
COLD area for st
cold check or in the HOT area or cross-hatched area
for
a hot check.
4. If the fluid level is where it should be, push the
dipstick back in all the way.
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How to Add Fluid:
Refer to the Maintenance Schedule to determine what
kind
of transmission fluid to use. See “Recommended
Fluids and.lLubricants” in the Index.
If the fluid level is low, add only enough of the proper
fluid to bring the level up to the COLD area for a cold
check or the
HOT area fora hot check. It doesn’t take
much fluid, generally less than a pint. Don’t overfill.
we
recommend you use only fluid labeled DEXRONBIIE,
because fluids with that label are made-especially for
you automatic transmission. Damage caused by fluid
other than DEXRON@IIE
is not covered by your new
vehicle warranty.
0 After adding fluid, recheck the fluid level as
described under “How to Check.77
0 When the correct-fluid level is obtained, push the
dipstick back in all the way.
Rear Axle
When to Check and Change Lubricant:
Refer to the Maintenance Schedule to determine how
often to check the lubricant and when to change it. See
“Periodic Maintenance Inspections” in the Index.
How to Check Lubricant:
If the level is below the bottom of the filler plug hole,
you’ll need to add some lubricant. Add enough lubricant
to raise the level to the bottom
of the filler plug hole.
What
to Use:
Standard Differential
Use Axle Lubricant (GM Part
No. 1052271) or SAE
80W-90 GL-5 gear lubricant.
Limited-Slip Differential
To add lubricant when the level is low, use Axle
Lubricant (GM Part
No. 1052271) or SAE 8OW-90
GL-5 gear lubricant.
To completely refill after draining,
add
4 ounces (1 18 ml) of Limited-Slip Differential
Lubricant Additive (GM Part
No. 1052358). Then fill to
the bottom of the filler plug hole with Axle Lubricant
(GM Part
No. 1052271) or SAE 80W-90 GL-5 gear
lubricant.

er to your cooling system
can be dangerous. Plain water,
or some other
liquid like alcohol, can boil before the proper
coolant mix will. Your vehicle’s coolant warning
system
is set for the proper coolant mix. Wi’th
plain water or the wrong mix, your engine could
get
too hot but you wouldn’t get the overheat
warning. Your engine could catch fire and you
or others could be burned. Use a
50/50 mix of
clean water and a proper antifreeze.
257

.. .. ,I
Adding Coolant ': . .:,.
The coolant recovery tank .is located at the left of the
engine compartment, directly behind
.. the'battery.
.To Ch.eck.Coolant: When your engine is cold, the
co;olant,level sl~oultj be .at
"FULL COLD,'' or a little .
high_-..'When your engine is 'warm, the. level should'ke:
up to ',L;. - iLL,HOT," or'a .little higherd. ' . .. '. .... ,. .
.. ' .," . .. ..
ro Add Coolant: If you need more coolant, add the.
oronP.1:
mix at the coolant recovery tar&.

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.
259

How To Check Power Steering Fluid: , ’ .
’ Unscrew the cap and wipe the dipstick with a clean rag.
Replace the cap and completely tighten it. Then remove
the cap again and look at the fluid level on the dipstick.
When the engine compartment is hot, the level %-‘- L
should be at the “HOT” mark. *. s
When the engine Compartment is cool, the level
should be at the “FULL
COLD’; mark.
What to Add:
Refer to the Maintenance Schedule to determine what
kind
of fluid to use. See (‘Recommended Fluids and
Lubricants” in the Index.
k‘ T, ’ . I

Windshield Washer Fluid
To Add:
The windshield washer reservoir is located at the left of
the engine compartment.
Open.
the cap labeled “WASHER FLUID ONLY.” Add
washer fluid until the bottle is full.
261