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Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1991 Buick Lesabre car and truck
repair procedures including Buick engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up &
drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install
procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c
system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix
your 1991 Buick Lesabre automobile. Try the Automotix DIY solution today!
We have info for following modifications of 1991 Buick Lesabre
- 1991 Buick Lesabre 3.8 V6 GAS, CID:231, Fuel Injection, Aspiration:231, Engine VIN:, Desg:C
- 1991 Buick Lesabre Custom 3.8 V6 GAS, CID:231, Fuel Injection, Aspiration:231, Engine VIN:, Desg:C
- 1991 Buick Lesabre Limited 3.8 V6 GAS, CID:231, Fuel Injection, Aspiration:231, Engine VIN:, Desg:C
BRAKE SERVICE PROCEDURES FOR 1991 Buick Lesabre AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Buick Lesabre cars and light trucks from 1990+.
DISC BRAKES, GENERAL MOTORS -> General Information -> BLEEDING DISC BRAKES
Vehicle: 1991 Buick Lesabre 3.8 V6 GAS
Pressure bleeding is recommended for all hydraulic disc brake systems.
The disc brake hydraulic system can be bled manually or with pressure bleeding equipment. On vehicles with disc brakes the brake pedal will require more pumping and frequent checking of fluid level in master cylinder during bleeding ope...
CLICK HERE TO GET FULL ACCESS TO 1991 Buick Lesabre BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1991 Buick Lesabre AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Buick Lesabre cars and light trucks from 1990+.
HYDRAULIC BRAKE SYSTEM, GENERAL MOTORS -> MASTER CYLINDER SERVICE -> Assembly -> CAST IRON TYPE -> COMPOSITE TYPE -> CORVETTE -> Disassembly -> EXCEPT CORVETTE -> Inspection
Vehicle: 1991 Buick Lesabre Custom 3.8 V6 GAS
COMPOSITE TYPE
Refer toFigs. and when performing the following procedures.
EXCEPT CORVETTE
Disassembly
- Remove master cylinder from vehicle as follows:
- Disconnect and plug hydraulic lines.
- Remove two master cylinder attaching nuts, then the master cylinder.
- Remove reservoir cover and diaphragm. Discard old brake fluid in reservoir.
- Inspect cover and diaphragm. Replace if cut, cracked or deformed.
- Remove fluid level switch, if equipped.
- On models with compact master cylinder, remove proportioner valve assembly,Fig. .
- Depress primary piston and remove lock ring.
- Plug primary fluid ou...
CLICK HERE TO GET FULL ACCESS TO 1991 Buick Lesabre BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1991 Buick Lesabre AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Buick Lesabre cars and light trucks from 1990+.
POWER BRAKE UNITS, GENERAL MOTORS -> DELCO-MORAINE TANDEM DIAPHRAGM TYPE -> Assembly -> Brakes Grab -> DESCRIPTION -> Disassembly -> Hard Pedal -> OVERHAUL -> Slow Or No Release -> TROUBLESHOOTING
Vehicle: 1991 Buick Lesabre Custom 3.8 V6 GAS
DESCRIPTION
This unit utilizes a vacuum power chamber, consisting of a front and rear shell, housing divider, front and rear diaphragm, plate assemblies, hydraulic pushrod and a diaphragm return spring,Figs. and .
The unit operates in much the same manner as the single diaphragm unit described previously. The diaphragm and plate assemblies utilize the pressure differential between the engine intake manifold vacuum and atmospheric pressure to assist in braking.
TROUBLESHOOTING
Hard Pedal
- Internal vacuum leak.
- Faulty control valve.
Brakes Grab
- Faulty control valve...
CLICK HERE TO GET FULL ACCESS TO 1991 Buick Lesabre BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1991 Buick Lesabre AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Buick Lesabre cars and light trucks from 1990+.
DISC BRAKES, GENERAL MOTORS -> Delco-Moraine Single Piston w/Dual Mounting Bolts (Type 2) -> SERVICE -> BRAKE SHOE & LINING INSTALLATION -> BRAKE SHOE & LINING REMOVAL -> CALIPER ASSEMBLY -> CALIPER DISASSEMBLY -> CALIPER INSTALLATION -> CALIPER REMOVAL
Vehicle: 1991 Buick Lesabre Custom 3.8 V6 GAS
CALIPER REMOVAL
- Remove approximately2/3 of brake fluid from master cylinder.
- Raise and support front of vehicle, then remove wheel and tire assembly.
- Position suitable pliers over inboard pad and housing as shown in Fig. , and squeeze pliers to compress caliper piston.
- If caliper assembly is being removed for service, remove inlet fitting attaching bolt, copper washer, and inlet fitting from caliper housing. Plug opening in inlet fitting to prevent fluid loss and contamination. Do not crimp brake hose, as this may damage internal structure of hose. If only shoe and lining assemblies are t...
CLICK HERE TO GET FULL ACCESS TO 1991 Buick Lesabre BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1991 Buick Lesabre AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Buick Lesabre cars and light trucks from 1990+.
DRUM BRAKES, GENERAL MOTORS -> Type 9 -> DESCRIPTION
Vehicle: 1991 Buick Lesabre Limited 3.8 V6 GAS
This brake assembly is of an advanced design. It operates with fewer parts, but is equal to other drum brake systems in performance. In th...
CLICK HERE TO GET FULL ACCESS TO 1991 Buick Lesabre BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1991 Buick Lesabre AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Buick Lesabre cars and light trucks from 1990+.
DISC BRAKES, GENERAL MOTORS -> Delco-Moraine Single Piston w/Dual Mounting Bolts (Type 2) -> SERVICE -> BRAKE SHOE & LINING INSTALLATION -> BRAKE SHOE & LINING REMOVAL -> CALIPER ASSEMBLY -> CALIPER DISASSEMBLY -> CALIPER INSTALLATION -> CALIPER REMOVAL
Vehicle: 1991 Buick Lesabre Limited 3.8 V6 GAS
CALIPER REMOVAL
- Remove approximately2/3 of brake fluid from master cylinder.
- Raise and support front of vehicle, then remove wheel and tire assembly.
- Position suitable pliers over inboard pad and housing as shown in Fig. , and squeeze pliers to compress caliper piston.
- If caliper assembly is being removed for service, remove inlet fitting attaching bolt, copper washer, and inlet fitting from caliper housing. Plug opening in inlet fitting to prevent fluid loss and contamination. Do not crimp brake hose, as this may damage internal structure of hose. If only shoe and lining assemblies are t...
CLICK HERE TO GET FULL ACCESS TO 1991 Buick Lesabre BRAKE SERVICE PROCEDURES
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