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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 PROCEDURES FOR Porsche 928 AUTOMOBILES
Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported Porsche 928 cars and light trucks from 1990+
Porsche -> Component Replacement & Adjustment -> EVAPORATOR, REPLACE -> 911 -> 928 -> 968
Vehicle: 1994 Porsche 928 GTS 5.4 V8 GAS
911
- Disconnect battery ground cable.
- Discharge and recover refrigerant from A/C system.
- Remove right floor mat from passenger compartment.
- Remove pedal floor board.
- Remove grating and plastic duct.
- Remove front luggage compartment pivot bolt, then open flap.
- Loosen hose clamp from air flex hose, then push hose from evaporator housing.
- Pull temperature sensor from evaporator housing guide tube.
- Loosen hose connection from expansion valve.
- Disconnect blower motor electrical connect...
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BRAKE SERVICE PROCEDURES FOR Porsche 928 AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported Porsche 928 cars and light trucks from 1990+.
PORSCHE, DISC BRAKES -> TIGHTENING SPECIFICATIONS
Vehicle: 1991 Porsche 928 GT 5.0 V8 GAS
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FUEL FILTER REPLACEMENT PROCEDURES FOR Porsche 928 AUTOMOBILES
Fuel filter replacement procedures with corresponding images for most domestic and imported Porsche 928 cars and light trucks sold in the U.S. for 1980+.
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 Porsche 928 AUTOMOBILES
Includes CV axle, universal joint, and driveline replacement, for domestic and imported Porsche 928 cars and light trucks from 1990+.
CV AXLE SHAFT, Replace -> Axle Shaft Bolted On Both Sides -> Axle Shaft Welded On One Side -> Rear
Vehicle: 1991 Porsche 928 GT 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 Porsche 928 AUTOMOBILES
Includes starter and alternator replacement procedures for domestic and imported Porsche 928 cars and light trucks from 1990+.
Starter, Replace
Vehicle: 1991 Porsche 928 S4 5.0 V8 GAS
- Disconnect battery ground cable at battery.
- Disconnect battery and alternator wiring, if equipped...
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MAINTENANCE LAMP RESET PROCEDURES FOR Porsche 928 AUTOMOBILES
Maintenance lamp reset procedures with corresponding images for most domestic and imported Porsche 928 cars and light trucks sold in the U.S. from 1990+.
Porsche -> Anti-Lock Brake System (ABS)/Traction Control System (TCS) Indicator ->
Vehicle: 1990 Porsche 928 S4 5.0 V8 GAS
The Anti-Lock Brake/Traction Control System lamp will be illuminated when the ignition switch is in the on position with engine not running. When the engine is started, the lamp should go out. ...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR Porsche 928 AUTOMOBILES
Includes radiator, cooling and heater hose replacement procedures for domestic and imported Porsche 928 cars and light trucks from 1990+
Radiator, Replace
Vehicle: 1991 Porsche 928 GT 5.0 V8 GAS
- Drain coolant into a suitable container.
- Reposition clamp on upper hose and remove hose.
- Reposition clamp on expansion tank hose and remove hose.
- Reposition clamp on lower hose and remove ho...
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SERPENTINE BELT SERVICE PROCEDURES FOR Porsche 928 AUTOMOBILES
Serpentine belt replacement procedures with corresponding images for most domestic and imported Porsche 928 cars and light trucks sold in the U.S. from 1990+.
Serpentine Drive Belt, Replace
Vehicle: 1993 Porsche 928 GTS 5.4 V8 GAS
- Remove vehicle grille.
- Disconnect fan harness leads, then remove cable ties from leads where required.
- Disconnect left and right brackets at condenser.
- Remove two upper fan housing mounting screws, then the lower mounting screw ...
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COMPONENT LOCATION DIAGRAMS FOR Porsche 928 AUTOMOBILES
Component location diagrams for most Porsche 928 cars and light trucks sold in the U.S. from 1990+.
![]() Components on diagram: |
![]() Components on diagram: |
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WIRING DIAGRAMS FOR Porsche 928 AUTOMOBILES
OEM drawn wiring diagrams for most Porsche 928 cars and light trucks sold in the U.S.
![]() Components on diagram: |
![]() Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR Porsche 928 AUTOMOBILES
OEM TSB listings for most Porsche 928 cars and light trucks sold in the U.S. from 1985+.
Document: PURCHASING VIN PLATES, CERTIFICATION LABELS, EMISSION LABELS AND 987/997 TIRE PRESSURE LABELS - REVISED Vehicle: 1990 Porsche 928 GT 5.0 V8 GAS Auto Systems: |
Document: EQUIPMENT - REFRIGERANT RECOVERY/RECYCLING STATION Vehicle: 1990 Porsche 928 S4 5.0 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR Porsche 928 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 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 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 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 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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