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1991 BMW 850I CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT BMW 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
- Serpentine Belt Service
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1991 BMW 850I car and truck
repair procedures including BMW 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 BMW 850I automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 1991 BMW 850I AUTOMOBILES
BMW -> Manual Air Conditioning & Heater System Diagnosis & Testing -> A/C SYSTEM DIAGNOSIS & TESTING -> SYSTEM PERFORMANCE CHECK
Vehicle: 1991 BMW 850I 5.0 V12 GAS
SYSTEM PERFORMANCE CHECK
System performance check should be performed as both initial an diagnostic check for cooling related complaints and a final check after repairs are completed.
- Connect manifold gauge set to A/C system and place suitable temperature sensors at evaporator outlet and outside vehicle.
- Start engine and run until it reaches normal operating temperature. Front of vehicle should be at least 5 ft. away from any wall or air obstruction during test. Use an external fan to force air past condenser, if necessary.
- Place bl...
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BRAKE SERVICE PROCEDURES FOR 1991 BMW 850I AUTOMOBILES
Disc Brakes -> TIGHTENING SPECIFICATIONS
Vehicle: 1991 BMW 850I 5.0 V12 GAS
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1991 BMW 850I AUTOMOBILES
BMW -> Fuel Shutoff Switch Location -> 1991-97 8 Series
Vehicle: 1991 BMW 850I 5.0 V12 GAS
The inertia switch is located...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1991 BMW 850I AUTOMOBILES
DRIVESHAFT U-JOINT, Replace -> Assembly -> Disassembly
Vehicle: 1991 BMW 850I 5.0 V12 GAS
Disassembly
- Raise and support vehicle.
- Remove propeller shaft assembly.
- Remove hose straps.
- Lift out circlip.
- Pull off constant velocity joint complete with dust cover.
- Press knurled head bolts and washers out of constant velocity joint.
- Press off dust cover.
Assembly
- Pack new constant velocity joint with 60 grams of grease (HWB). Do not pack the inner race with cage since the balls would tall ...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1991 BMW 850I AUTOMOBILES
Alternator, Replace
Vehicle: 1991 BMW 850I 5.0 V12 GAS
- Disconnect ground leads from batteries.
- Unfasten cover from oil filter to enable engine oil to flow back into oil pan.
- Remove complete upper section of suction filter housing together with mass air flow sensor.
- Unfasten clips and hose clips.
- Remove cover from ignition coil.
- Remove nuts and leads from ignition coil.
- Remove viscous fan.
- Unfasten hose clip from cooling air hose on alternator.
- Remove nut and bolt from clamping fixture for toothed V-belt.
- Remove top mounting bolt on alternator.
- Remove V-belt.
- Remove splash guard.
- Remove...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1991 BMW 850I AUTOMOBILES
BMW -> Service Indicator Cluster ->
Vehicle: 1991 BMW 850I 5.0 V12 GAS
The service indicator cluster is used indicate when periodic maintenance is required. The service indicator consists of one yellow, five green and three red Light Emitting Diodes (LEDs), with the inscriptions "Oil Service" and "Inspection." When the ignition switch is turned to the On position, as many as five green LEDs will be illuminated.
The green LEDs will go out when the engine is started. If the yellow LED and one of the inscriptions illuminates with the ignition switch in the On position, and remain on after the engine has started, service the maintenance inscription indicated immediately. ...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1991 BMW 850I AUTOMOBILES
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 1991 BMW 850I 5.0 V12 GAS
Lower
- Drain coolant into a suitable container.
- Reposition hose clamp and remove hose from radiator.
- Reposition hose clamp and remove hose from engine.
- Remove hose from vehicle.
- Reverse procedure to ins...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1991 BMW 850I AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1991 BMW 850I 5.0 V12 GAS
If drive belt is to be subsequently reused: Mark direction of travel and reinstall drive belt in same direction of travel.
- Remove fan clutch with impeller.
- Loosen screws on ...
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COMPONENT LOCATION DIAGRAMS FOR 1991 BMW 850I AUTOMOBILES
Component location diagrams for most 1991 BMW 850I cars and light trucks sold in the U.S. from 1990+.
 On-Board Computer Temperature Sensor & ABS Hydraulic Unit Diagram for 1991 BMW 850I 5.0 V12 GASComponents on diagram: |
 Wiper, Starter & Blower Relays Diagram for 1991 BMW 850I 5.0 V12 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 1991 BMW 850I AUTOMOBILES
OEM drawn wiring diagrams for most 1991 BMW 850I cars and light trucks sold in the U.S.
 1991 BMW 850I 5.0 V12 GAS Wiring DiagramComponents on diagram: |
 1991 BMW 850I 5.0 V12 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1991 BMW 850I AUTOMOBILES
OEM TSB listings for most 1991 BMW 850I cars and light trucks sold in the U.S. from 1985+.
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Document: Tools and Equipment Vehicle: 1991 BMW 850I 5.0 V12 GAS Auto Systems: |
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Document: Turbocharger Installation Tool Vehicle: 1991 BMW 850I 5.0 V12 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1991 BMW 850I AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1991 BMW 850I 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 BMW 850I 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 BMW 850I 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 BMW 850I 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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