1993 BUICK RIVIERA cooling

are made especially for your automatic transaxle.
Damage caused by fluid other than
DEXRONs-IIE is
not covered by your new vehicle warranty.
After adding fluid, recheck the fluid level as
described under
“How to Check.”
When the correct fluid level is obtained, push the
dipstick back in all the way.
Engine Coolant
The following explains your cooling system and how to
add coolant when it is low. If you have a problem with
engine overheating, see “Engine Overheating” in the
Index.
The proper coolant for your Buick
will:
Give freezing protection down to -34’F (-37 ’ C) .
0 Give boiling protection up to 262 ’ F ( 128 ’ C) .
Protect against rust and corrosion.
Help keep the proper engine temperature.
0 Let the warning lights work as they should.
What to Use:
Use a mixture of one-half clean water (preferably
distilled) and one-half antifreeze that meets “GM Specification 1825-M,” which won’t damage aluminum
parts. Use GM Engine Coolant Supplement (sealer) with
any complete coolant change. You can also use a
recycled coolant conforming to “GM Specifications
1825-M” with a complete coolant flush and-refill.
If you
use these, you don’t need to add anything else.
Adding only plain water 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 warnin!
system
is set for the proper coolant mix. With
plain water or the wrong mix, your engine coul
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
50150 mix of
clean water and
a proper antifreeze.
231

Scheduled Maintenance Services Schedule I
Follow Schedule I if your car is MAINLY driven under one or more of the following conditions:
0 When most trips are less than 4 miles (6 kilometers).
0 When most trips are less than 10 miles (16 kilometers) and outside temperatures remain below fieezing.
0 When most trips include extended idling and/or frequent low-spee\
d operation as in stop-and-go traffic.
0 Towing a trailer.*?
0 When operating in dusty areas.
Schedule I should also be followed if the car is used for delivery service, police, taxi or other commercial applications.
TO BE SERVICED
(See Explanation of
Scheduled Maintenance
Services Following
Schedules
I and n)
Item No.
1. Engine Oil & Oil Filter
Change*
2. Chassis Lubrication
3. Throttle Body Mounting
Bolt Torque*
4. Tire
& Wheel Inspection &
Rotation
5. Engine Accessory Drive Belt(s) Inspection*
6. Cooling System Service*
WHEN TO PERFORM
Miles (kilometers) or Months, Whichever MILES (000)
Occurs First
k
Every 3 000 mi. (5000 km)
or 3 months. , I
Every other oil change
At
6 000 mi. (10 000 km)
only
I
At 6 000 mi. (10 000 km) and
then every
15 000 mi. (25 000
km) or as necessary I
Every 30 000 mi.
(50 000 km) or 24 months.
KILOMETERS (000)
30 35
00
0
0
..
45 50 55
000
0
0
65 70
00
0
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~ Scheduled Maintenance Services Schedule I1
~
~ .
I
Follow Schedule
I1 ONLY if none of the driving conditions specified in Schedule I apply.
TO BE SERVICED
(See Explanation of
Scheduled Maintenance Services Following Schedules
I and II)
Item No.
1. Engine Oil Change*
Oil Filter Change*
2. Chassis Lubrication
3. Throttle Body Mounting Bolt Torque*
4. Tire & Wheel Inspection & Rotation
5. .Engine Accessory Drive Belt(s) Inspection*
6. Cooling System Service*
7. Transaxle Service
WHEN TO PERFORM
Miles (kilometers) or
7.5
Months, Whichever Occurs First
12.5
Every
7 500 mi. (12 500 km) or 12 mos. 0
At first and then every other oil change 0
Every 7 500 mi. (12 500 km) or 12 mos. 0
At 7 500 mi. (12 500 km) only 0
At 7 500 mi. (12 500 km) and then every
15
000 mi. (25 000 km) or as necessary 0
Every 30 000 mi. (50 000 km) or 24 mos.
See Explanation of Scheduled Maintenance
Services Following Schedules
I and I1
MILES (000)
KILOMETERS (000)
276 -

conditioning condenser. Wash the pressure cap and
neck.
To help ensure proper operation, we recommend a
pressure test of both the, cooling system and the
pressure cap.
7. Transaxle Service -- Change both the fluid and filter
every
15,000 miles (25 000 km) if the vehicle is
mainly driven under one or more of these conditions:
In heavy city traffic where the outside
temperature regularly reaches
90 F (32 C) or
higher.
In hilly or mountainous terrain.
Uses such as found in taxi, police car or delivery
If you do not use your vehicle under any of these
conditions, change both the fluid and filter every
100,000 miles (160 000 km).
8. Spark Plug Replacement* -- Replace spark plugs
with the proper type. See “Specifications Chart” in
the Index.
service.
9. Spark
Plug Wire Inspection*? -- Inspect for burns,
cracks or other damage. Check the boot fit at the
distributor and at the spark plugs. Replace wires as
needed.
10. Air Cleaner Filter Replacement* -- Replace every
30,000 miles
(50 000 km) or more often under dusty
conditions.
Ask your dealer for the proper
replacement intervals for your driving conditions.
11. Fuel Tank, Caa, and Lines Insa,ection*T -- Inspect
fuel tank, cap and lines (including fuel rails and
injection assembly, if equipped) for damage or leaks.
Inspect fuel cap gasket for an even filler neck
imprint or any damage. Replace parts as needed.
Periodic replacement of the fuel filter is not required.
i
* An Emission Control Service.
3‘ The U.S. Environmental Protection Agency has determined that the failure \
to perform this maintenance item will not nullify the emission warranty or limitrecall liability prior to the completion of vehicle
useful life. General Motors, however, urges that all recommended maintenance services be performed at the indicated intervals and the maintenance be recorded in “Section EMaintenance Record“.
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