SERVICE MANUAL UPDATE - SECTION 0B-9 AND3-28. Buick Coachbuilder 1993

For 1990-2009 cars

# SERVICE MANUAL UPDATE - SECTION 0B-9 AND3-28

#### SUBJECT: SERVICE MANUAL UPDATE - SECTION OB-99 MAINTENANCE AND LUB. AND SECTION 3-28 STEERING, SUSPENSION, TIRES AND WHEELS DIAGNOSIS

#### MODELS AFFECTED: 1993 ROADMASTER

#### SERVICE MANUAL UPDATE

Section OB-9 and Section 3-28

Application: 1993 Roadmaster

Spark Plug and Suspension Specification changes for the above model. the above model.

The Service Manual for Section OB-9 and Section 3-28 has been revised. These pages should be replaced in the current Service Manual.

#### MAINTENANCE ITEMS

Air Cleaner Filter..................................AC Type A1135C

Engine Oil Filter...................................AC Type PF25

Fuel Filter.........................................AC Type GF580

PCV Valve...........................................AC Type CV914C

Spark Plug Assemblies and Gap.......................AC.CR43TS 0.89 mm (0.035")

#### APPROXIMATE FLUID CAPACITIES

#### Air Conditioning

R-12................................................1.4 kg (3.1 lb.)

#### Engine Crankcase

Without Filter Change...............................3.8 liters (4.0 qt.)

With Filter Change..................................4.3 liters (4.5 qt.)

#### FuelTank

Sedan...............................................87.4 liters (23 gal.)

Wagon...............................................83.3 liters (22 gal.)

#### Transmission

#### Automatic (HYDRA-MATIC 4L60)

Drain & Refill......................................4.7 liters (10.0 pt.)

Overhaul............................................10.6 liters (22.4 pt.)

#### Cooling System

Without Heavy-Duty Radiator.........................13.7 liters (14.5 qt.)

With Heavy-Duty Radiator............................13.8 liters (14.6 qt.)

The capacities shown here are approximate. Add fluid as necessary to bring to appropriate level.

#### WHEEL NUT TORQUE

Wheel Nuts..........................................140 N.m (100 lb. ft.)

#### REAR AXLE FILLER PLUG TORQUE

Filler Plug.........................................35 N-m (26 lb. ft.)

#### BELT TENSION SPECIFICATIONS

Engines equipped with serpentine belts have an automatic tensioner. No adjustment of this belt is necessary.

#### TIRE PRESSURE SPECIFICATIONS

#### Sedan

Front...............................................205 kPa (30 psi)

Rear................................................205 kPa (30 psi)

Compact Spare.......................................415 kPa (60 psi)

Full-Size Spare.....................................240 kPa (35 psi)

#### Wagon

Front...............................................205 kPa (30 psi)

Rear................................................240 kPa (35 psi)

Compact Spare.......................................415 kPa (60 psi)

Full-Size Spare.....................................240 kPa (35 psi)

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.