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1991 Porsche 928 CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Porsche REPAIR SHOPS DON'T WANT YOU TO KNOW
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- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1991 Porsche 928 car and truck
repair procedures including Porsche 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 Porsche 928 automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 1991 Porsche 928 AUTOMOBILES
Electrical Symbol & Wire Color Code Identification -> Electrical Symbol Identification -> Imported Vehicles
Vehicle: 1991 Porsche 928 GT 5.0 V8 GAS
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BRAKE SERVICE PROCEDURES FOR 1991 Porsche 928 AUTOMOBILES
PORSCHE, DISC BRAKES -> TIGHTENING SPECIFICATIONS
Vehicle: 1991 Porsche 928 S4 5.0 V8 GAS
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1991 Porsche 928 AUTOMOBILES
Porsche -> Fuel Filter Scheduled Maintenance -> 1980-94 911, 924, 928, 944 & 968 -> Normal Service -> Severe Service
Vehicle: 1991 Porsche 928 S4 5.0 V8 GAS
Normal Service
Replace ev...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1991 Porsche 928 AUTOMOBILES
CV AXLE SHAFT, Replace -> Axle Shaft Bolted On Both Sides -> Axle Shaft Welded On One Side -> Rear
Vehicle: 1991 Porsche 928 S4 5.0 V8 GAS
Rear
Axle Shaft Bolted On Both Sides
- Raise and support vehicle, then remove left rear wheel and tire assembly.
- Remove socket head bolts from drive flanges.
- Remove righthand axle shaft inward.
- Remove lefthand axle shaft outward.
- Reverse procedure to install, noting the following:
- Torque wheel lug nuts to 80 ft. lbs.
- Torque socket head bolts to 60 ft. lbs.
Axle Shaf...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1991 Porsche 928 AUTOMOBILES
Alternator, Replace
Vehicle: 1991 Porsche 928 GT 5.0 V8 GAS
- Remove righthand seat and open rear wall cover.
- Disconnect alternator and starter battery power leads.
- Remove serpentine drive belt.
- Remove righthand mount bolt and loosen lefthand mounting bolt three turns, then gently tab bolt to loosen threaded bushed in alternator arm, use a suitable aluminum mandrel to tap bolt.
- Remove alternator from slotted bracket, then the deflection roller.
- Turn alternator cloc...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1991 Porsche 928 AUTOMOBILES
Porsche -> Air Bag Warning Lamp ->
Vehicle: 1991 Porsche 928 GT 5.0 V8 GAS
The Air Bag warning lamp will light briefly when the ignition switch is placed in the on position as a bulb check. If the...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1991 Porsche 928 AUTOMOBILES
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 1991 Porsche 928 GT 5.0 V8 GAS
Lower
- Drain coolant into a suitable container.
- Reposition clamp at radiator and remove hose.
- Reposition clamp at thermostat housing and remove hose.
- Remove hose from vehicle.
- Reverse procedure ...
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COMPONENT LOCATION DIAGRAMS FOR 1991 Porsche 928 AUTOMOBILES
Component location diagrams for most 1991 Porsche 928 cars and light trucks sold in the U.S. from 1990+.
 Central Electrics Relay Locations Diagram for 1991 Porsche 928 S4 5.0 V8 GASComponents on diagram: |
 Alarm Control Unit Diagram for 1991 Porsche 928 S4 5.0 V8 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 1991 Porsche 928 AUTOMOBILES
OEM drawn wiring diagrams for most 1991 Porsche 928 cars and light trucks sold in the U.S.
 1991 Porsche 928 S4 5.0 V8 GAS Wiring DiagramComponents on diagram: |
 1991 Porsche 928 S4 5.0 V8 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1991 Porsche 928 AUTOMOBILES
OEM TSB listings for most 1991 Porsche 928 cars and light trucks sold in the U.S. from 1985+.
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Document: WARRANTY ADMINISTRATION - CSO SURCHARGES NOT ALLOWED ON WARRANTY CLAIMS Vehicle: 1991 Porsche 928 S4 5.0 V8 GAS Auto Systems: |
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Document: OVERVIEW OF APPROVED ENGINE OILS - REVISED Vehicle: 1991 Porsche 928 S4 5.0 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1991 Porsche 928 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1991 Porsche 928 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 1991 Porsche 928 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 1991 Porsche 928 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 1991 Porsche 928 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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