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Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1990 GEO Metro car and truck
repair procedures including GEO 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 1990 GEO Metro automobile. Try the Automotix DIY solution today!
We have info for following modifications of 1990 GEO Metro
- 1990 GEO Metro LSI 1.0 L3 GAS, CC:993, CID:61, Fuel Injection, Aspiration:61, Engine VIN:, Desg:6
- 1990 GEO Metro XFI 1.0 L3 GAS, CC:993, CID:61, Fuel Injection, Aspiration:61, Engine VIN:, Desg:6
- 1990 GEO Metro 1.0 L3 GAS, CC:993, CID:61, Fuel Injection, Aspiration:61, Engine VIN:, Desg:6
BRAKE SERVICE PROCEDURES FOR 1990 GEO Metro AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 GEO Metro cars and light trucks from 1990+.
HYDRAULIC BRAKE SYSTEMS, GENERAL MOTORS -> COMPONENT DESCRIPTION -> HYDRAULIC CONTROL VALVES -> MASTER CYLINDER
Vehicle: 1990 GEO Metro 1.0 L3 GAS
MASTER CYLINDER
Some vehicles use a conventional tandem master cylinder with two hydraulic pistons operating in line. The primary piston controls the front brake system and the secondary piston controls the rear brake system.
Other models use a master cylinder that operates the same as the conventional master cylinder, but also incorporates a quick take-up feature in the rear chamber to reduce excessive pedal travel which may result from increased fluid displacement required to move the low drag caliper piston out against the rotor.
The quick take-up uses a spring-loaded ball...
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BRAKE SERVICE PROCEDURES FOR 1990 GEO Metro AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 GEO Metro cars and light trucks from 1990+.
HYDRAULIC BRAKE SYSTEM, GENERAL MOTORS -> SYSTEM OPERATION -> Diagonally Split System -> DUAL MASTER CYLINDER -> Front & Rear Split System
Vehicle: 1990 GEO Metro 1.0 L3 GAS
DUAL MASTER CYLINDER
Front & Rear Split System
When the brake pedal is depressed, both the primary (front brake) and the secondary (rear brake) master cylinder pistons are moved simultaneously to exert hydraulic fluid pressure on their respective systems,Figs. and .
If the rear (secondary) brake system fails, initial brake pedal movement will cause the unrestricted secondary piston to bottom in the master cylinder bore. Primary piston movement will displace hydraulic fluid in the primary section of the master cylinder to actuate the front brake system.
If the front (primary) brak...
CLICK HERE TO GET FULL ACCESS TO 1990 GEO Metro BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1990 GEO Metro AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 GEO Metro cars and light trucks from 1990+.
HYDRAULIC BRAKE SYSTEMS, GENERAL MOTORS -> HEIGHT SENSING PROPORTIONING VALVE, Adjust
Vehicle: 1990 GEO Metro 1.0 L3 GAS
The height sensing proportioning valve must be adjusted whenever the valve and/or linkage is disassembled or removed for service. In addition, adjustment should be checked if excessive front wheel lock-up is experienced with a lower than desired brake application rate when vehicle is at or near maximum GVWR.
- Raise and support vehicle leaving wheels on, and allow axle to hang free (no load condition).
- Remove lever retaining nut and disconnect lever from valve shaft, Fig. .
- Rotate valve shaft to permit installation of correct adjustment gauge, Fig. ,...
CLICK HERE TO GET FULL ACCESS TO 1990 GEO Metro BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1990 GEO Metro AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 GEO Metro cars and light trucks from 1990+.
DISC BRAKES, GENERAL MOTORS -> General Information -> TROUBLESHOOTING
Vehicle: 1990 GEO Metro XFI 1.0 L3 GAS
When troubleshoot...
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BRAKE SERVICE PROCEDURES FOR 1990 GEO Metro AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 GEO Metro 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: 1990 GEO Metro 1.0 L3 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 1990 GEO Metro BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1990 GEO Metro AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 GEO Metro cars and light trucks from 1990+.
HYDRAULIC BRAKE SYSTEMS, GENERAL MOTORS -> MASTER CYLINDER SERVICE -> Assemble -> BENDIX TYPE -> CAST IRON TYPE -> COMPOSITE TYPE -> DELCO MORAINE TYPE -> Disassemble -> Inspection -> TRACKER MODELS
Vehicle: 1990 GEO Metro XFI 1.0 L3 GAS
DELCO MORAINE TYPE
COMPOSITE TYPE
Refer to Figs. and when performing the following procedures.
Disassemble
- Remove master cylinder from vehicle.
- 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 and proportioner valve assembly, if equipped.
- Depress primary piston and remove lock ring.
- Plug primary fluid outlet (outlet nearest to cowl when master cylinder is installed), then apply compressed air into secondary fluid outlet to remove primary and secondary pistons.
- R...
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