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1993 Buick Century CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Buick REPAIR SHOPS DON'T WANT YOU TO KNOW
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- Component Locations
- Wiring Diagrams
- Technical Service Bulletins
- Specifications
- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
A/C & HEATER SERVICE PROCEDURES FOR 1993 Buick Century AUTOMOBILES
Cooling Fans -> Passenger Cars Except Saturn -> CUTLASS SUPREME, GRAND PRIX & REGAL -> COMPONENT REPLACEMENT -> Coolant Fan, Replace -> Cooling Fan Isolation Test -> Cooling Fan Runs At High Speed Only -> DESCRIPTION -> EXCEPT REGAL w/3800 (VIN L) ENGINE -> High Speed Operation -> Low Speed Operation -> MODELS EXCEPT REGAL w/3800 (VIN L) ENGINE -> No Cooling Fans Operate At High Speed -> Primary Coolant Fan Does Not Run -> Primary Coolant Fan Runs Continuously With Engine Coolant Cool & A/C Mode Selector Off -> Primary Cooling Fan Does Not Run -> Primary Cooling Fan Does Not Run At High Speed -> REGAL w/3800 (VIN L) ENGINE -> Secondary Coolant Fan And/Or Generator Coolant Fan (VIN X) Does Not Run -> Secondary Coolant Fan And/Or Generator Coolant Fan Runs Continuously With Engine Coolant Cool & A/C Mode Selector Off -> Secondary Cooling Fan Does Not Run -> Secondary Cooling Fan Does Not Run At High Speed -> SYSTEM DIAGNOSIS -> SYSTEM DIAGNOSIS & TESTING -> TROUBLESHOOTING
Vehicle: 1993 Buick Century Limited 2.2 L4 GAS
DESCRIPTION
EXCEPT REGAL w/3800 (VIN L) ENGINE
Each coolant fan is turned on and off by separate coolant fan relays.
The primary coolant fan relay coil is grounded through the ECM when vehicle speed is less than a speed determined by the ECM and engine coolant reaches 227°F with A/C off and 223°F with A/C on. The contacts close and voltage is applied through the primary coolant fan relay to the primary coolant fan. The primary coolant fan runs until the ignition switch is turned off, or coolant temperature decreases to 220°F with A/C off...
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BRAKE SERVICE PROCEDURES FOR 1993 Buick Century AUTOMOBILES
Anti-lock Brakes -> Achieva, Beretta, Cavalier, Century, Corsica, Cutlass Ciera, Cutlass Cruiser, Cutlass Supreme, Grand Am, Grand Prix, Lumina, Regal, Skylark, Sunbird & 1993-94 Camaro, Firebird & Prizm (Delco-Moraine VI Type) -> System Service -> ABS HYDRAULIC MODULATOR ASSEMBLY -> BRAKE CONTROL SOLENOID ASSEMBLY -> Brake System Bleed -> Component Replacement -> Cutlass Supreme, Grand Prix, Lumina & Regal -> ELECTRONIC BRAKE CONTROL MODULE (EBCM) -> Except Cutlass Supreme, Grand Prix, Lumina & Regal -> FRONT WHEEL SPEED SENSOR -> MANUAL BLEED -> PRESSURE BLEED -> REAR WHEEL BEARING & SPEED SENSOR
Vehicle: 1993 Buick Century Special 3.3 V6 GAS
Brake System Bleed
Before bleeding the rear brakes, the rear displacement cylinder pistons must be returned to their top most position. Using a TECH 1 scan tool or suitable equivalent, enter the manual control function and "APPLY" the rear motor. Ensure the enable relay is "ON." If a scan tool is not available, bleed the front brakes to ensure that a firm brake pedal exists, then carefully drive vehicle over 4 mph to cause the ABS to initialize itself. This will return the rear displacement cylinder to the top position. The entire brake system should now be rebled.
PRESSURE BLEED
To pre...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1993 Buick Century AUTOMOBILES
General Motors Corp./Saturn Passenger Cars -> Component Locations -> Century (1982-05), Regal, Celebrity, Cutlass Ciera, Cutlass Cruiser & 6000 2.5L, 2.8L MFI, 3.1L, 3.3L & 3.8L Engines
Vehicle: 1993 Buick Century Limited 3.3 V6 GAS
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1993 Buick Century AUTOMOBILES
CV AXLE SHAFT, Replace
Vehicle: 1993 Buick Century Limited 3.3 V6 GAS
- Raise and support vehicle, then remove tire and wheel assembly.
- Install a brass drift or a screwdriver to prevent rotor from turning.
- Remove shaft nut and washer.
- Remove brake caliper from steering knuckle and suspend caliper assembly.
- Remove rotor from hub and bearing assembly, then stabilizer shaft or link from control arm.
- Remove ball joint from steering knuckle.
- Remove drive axle from transaxle using axle shaft remover tool No. J-33008, a...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1993 Buick Century AUTOMOBILES
Starter, Replace
Vehicle: 1993 Buick Century Custom 3.3 V6 GAS
Upon removal of starter, note if any shims are used. If shims are used, they should be reinstalled in their original location during installation.
If starter is noisy during cranking, remove one .015 inch double shim or add one .015 inch single shim to outer bolt. If starter makes a high pitched whine after firing, add .015 inch double shims until noise ceases.
- Di...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1993 Buick Century AUTOMOBILES
General Motors Corp./Saturn Cars -> Air Bag Warning Lamp ->
Vehicle: 1993 Buick Century Special 2.2 L4 GAS
This lamp should light for a approximately 6-8 seconds when the ignition is turned on as a bulb check. If the air b...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1993 Buick Century AUTOMOBILES
Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 1993 Buick Century Custom 3.3 V6 GAS
Inlet
- Drain cooling system into a suitable container.
- Reposition heater hose inlet clamp at water outlet pipe using hose clamp pliers.
- Remove heater inlet hose from water outlet pipe.
- Reposition heater core inlet hose clamp at heater core using hose clamp pliers.
- Remove hose from vehicle.
- Reverse procedure to i...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1993 Buick Century AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1993 Buick Century Limited 3.3 V6 GAS
- Disconnect battery ground cable.
- Support engine using suitable tool.
- Remove engine mount to body bracket bolts in wheelwell.
- Remove engine mount to body bracket and engine bracket bolts in engine compartment.
- Remove engine mount.
- ...
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COMPONENT LOCATION DIAGRAMS FOR 1993 Buick Century AUTOMOBILES
Component location diagrams for most 1993 Buick Century cars and light trucks sold in the U.S. from 1990+.
RH Rear of Engine Compartment Diagram for 1993 Buick Century Special 3.3 V6 GAS Components on diagram: |
Lower Rear of LH Front Door Diagram for 1993 Buick Century Special 2.2 L4 GAS Components on diagram: |
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WIRING DIAGRAMS FOR 1993 Buick Century AUTOMOBILES
OEM drawn wiring diagrams for most 1993 Buick Century cars and light trucks sold in the U.S.
1993 Buick Century Custom 3.3 V6 GAS Wiring Diagram Components on diagram: |
1993 Buick Century Limited 3.3 V6 GAS Wiring Diagram Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1993 Buick Century AUTOMOBILES
OEM TSB listings for most 1993 Buick Century cars and light trucks sold in the U.S. from 1985+.
Document: Car and Truck Fix It Right the First Time Issues Vehicle: 1993 Buick Century Custom 3.3 V6 GAS Auto Systems: |
Document: Air Conditioning Odor Vehicle: 1993 Buick Century Custom 3.3 V6 GAS Symptoms: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1993 Buick Century AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1993 Buick Century cars and light trucks sold in the U.S. and Canada from 1970+.
- Brake caliper mounting bolt torque
- Brake drum runout, machining, & discard specs
- Minimum brake lining thickness.
- Brake rotor runout, parallelism, machining, discard, & finish specs
A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most 1993 Buick Century cars and light trucks sold in the U.S. and Canada from 1980+.
- Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap
COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.
PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules
QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most 1993 Buick Century cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.
- Automatic transmission/transaxles capacities, lubricant recommendations
- Differential/final drive capacities, lube recommendations, grades, & viscosities
- Final drive fill & drain plug torques
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
- Severe service maintenance & interval recommendations
- Tire sizes, wheel nut/bolt torque, pressures & rim sizes
- Transfer case capacities, lube recommendations, grades, & viscosities
TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most 1993 Buick Century cars and light trucks sold in the U.S. and Canada from 1980+
- Airflow sensor electrical specifications
- Tensioning specifications for systems with automatic tensioners
- Barometric pressure sensor specs
- Battery group number and cranking performance
- Crankshaft & camshaft position sensor resistance
- Engine compression pressures
- Coolant temperature sensor specs
- Computer advance.
- Diesel fuel temperature sensor resistance.
- Distributor advance specifications
- Ignition pickup coil resistance
- Exhaust gas recirculation temperature sensor resistance
- Engine fastener torque values
- Firing order diagrams
- Fuel system pressures
- Generator (alternator) specs
- Intake air temperature sensor specs
- Ignition coil specifications
- Fuel injector resistance
- Engine idle speeds
- Knock sensor resistance
- Manifold absolute pressure sensor specs
- Mixture control solenoid resistance
- Voltage regulator specs
- Spark plug applications & gaps
- Starter motor electrical specs.
- Tensioning specifications for systems without automatic tensioners
- Throttle body temperature sensor resistance
- Ignition timing in degrees at rpm
- Transmission oil temperature sensor resistance
- Throttle position sensor specs
- Vacuum sensor valve specs
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