spark plugs replace BUICK ROADMASTER 1993 Owners Manual

7.
8.
To help ensure-proper operation, we recommena a
pressure test of both’the cooling system and the
pressure cap. If you do not use your vehicle under any of these
conditions, change both the fluid and filter every
100,000 miles (1 60 000 km).
Front Wheel Bearing Repack - When your 9. Spark Plug Replacement* - Replace spark plugs
vehicle is used in such service as police work, as a with the proper type. See “Specifications Chart.’’ in
taxi or
in door-to-door delivery, clean and repackthe the Index.
front wheel bearings at each brake relining or
15,000 Spark plug Wire Inspection*? - Inspect for
miles (25 000 km), whichever comes first. If you
don’t use your vehicle in such service, clean
and
repack the bearings at each brake relining or 30,000 -
miles (50 000 km) whichever comes first. burns, cracks .or other damage. Check the boot fit
at
the distributor and at the spark plugs. Replace wires
as. needed.
Transmission 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 heayy city traffic where the outside
temperature regularly reaches
‘90 OF (32 C) or
higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police car or delivery
service.
11. Exhaust Gas Recirculation (EGR) System
Inspection*?
- Conduct the EGR system service
as described in the service manual.
To purchase a
service manual, see “Service Publications” in the
Index.
12. Air Cleaner Filter Replacement* - Replace every
30,000 miles (50 000 km) or more ofkn under dusty
conditions. Ask your dealer for the proper
replacement intervals for your driving conditions.
307
I

I USAGE
Chassis
Lubrication
Front Wheel Bearings
USAGE
Rear Axle (Standard
Differential)
FLUID/LUBRICANT
Chassis lubricant meeting
requirements of NLGI Grade
2,
Category LB. or GC-LB (GM Part
No. 1052497 or equivalent).
Wheel bearing lubricant meeting
requirements of NLGI Grade
2,
Category GC or GC-LB (GM Part
No. 1051344 or equivalent).
Axle Lubricant
(GM Part No.
1052271) or SAE 8OW-90 %L-5
Gear Lubricant.
Axle Lubricant (GM Part
No.
1052271) or SAE 80W-90 GL-5
Gear Lubricant, and Limited-Slip
DifferentialLubricant Additive (GM
Part
No. 1052358) or equivalent
where required. See “Rear Axle” in
the .Index.
GM Optikleen@ Washer Solvent
(GM Part No. 10515.15) or
equivalent.
FLUIDlLUBRICANT
Rear Axle (Limited-Slip
Differential)
Windshield
Washer Solvent Hood Latch
Assembly
a. Pivots and Spring
Anchor
b. Release Pawl
Hood and Door
Hinges
Fuel Filler Door Hinge, Rear
.Compartment
Lid Hinges,
Wagon Tailgate
Hinge, Rear Folding Seat
~~
Weatherstrips a. Engine oil.
b. Chassis lubricant meeting
requirements
of NLGI Grade 2,
Category LB ‘or GC-LB (GM Part
No.
12346003 or equivalent).
Engine oil or Lubriplate Lubricant
(GM Part No.
1050109).
Engine oil ox: Lubriplate Lubricatn
(GM’Part No.
1050109).
Dielectric Silicone Grease (GM Part
No. 12345579 or equivalent).
See “Specifications Chart” in the Index for
recommended replacement filters, valves and spark
plugs.
315