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1990 Oldsmobile 98 CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Oldsmobile REPAIR SHOPS DON'T WANT YOU TO KNOW

Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!

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Get Full Access Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1990 Oldsmobile 98 car and truck repair procedures including Oldsmobile 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 Oldsmobile 98 automobile. Try the Automotix DIY solution today!
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Using the Automotix DIY repair procedures will save you hundreds and even thousands of dollars! In addition, it will save you hours of touring the city searching for Oldsmobile mechanics you can trust. The Automotix DIY solution is particularly affordable. A full access to the entire DIY repair procedures and diagrams for your 1990 Oldsmobile 98 vehicle will cost less than a single gallon of gas. Here are some of the DIY repair tips and procedures you will find here:

A/C & HEATER SERVICE PROCEDURES FOR 1990 Oldsmobile 98 AUTOMOBILES

A/C & Cooling System Maintenance -> General Motors Corp. -> 1990-2002 Buick Electra, LeSabre & Park Avenue, Oldsmobile Eighty-Eight, LSS, Ninety-Eight & Regency & Pontiac Bonneville
Vehicle: 1990 Oldsmobile 98 Regency Touring 3.8 V6 GAS

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BRAKE SERVICE PROCEDURES FOR 1990 Oldsmobile 98 AUTOMOBILES

ANTI-LOCK BRAKES, GENERAL MOTORS -> 1990 Bonneville, DeVille, Eighty-Eight, Electra, Fleetwood, Ninety-Eight, Park Avenue & 6000 (Teves Type) -> SYSTEM COMPONENTS -> ANTI-LOCK WARNING LAMP -> BRAKE WARNING LAMP -> ELECTRONIC BRAKE CONTROL MODULE (EBCM) -> HYDRAULIC UNIT -> TIMER FLASHER MODULE
Vehicle: 1990 Oldsmobile 98 Regency Brougham 3.8 V6 GAS

The anti-lock brake system, Fig. , consists of a pump motor assembly, fluid accumulator, pressure switch, fluid reservoir with integral filter, hydraulic booster/master cylinder, wheel speed sensors, Electronic Brake Control Module (EBCM) and a valve block assembly.

ELECTRONIC BRAKE CONTROL MODULE (EBCM)

The EBCM monitors speed of each wheel to determine if any wheel is beginning to lock. If a locking condition is sensed, brake pressures are automatically adjusted to provide for maximum stopping without wheel lock.

TIMER FLASHER MODULE

On some models, the pump circuit includes a t...

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FUEL FILTER REPLACEMENT PROCEDURES FOR 1990 Oldsmobile 98 AUTOMOBILES

General Motors Corp./Saturn Passenger Cars -> Fuel Filter Replacement -> Except Aveo, Chevette 1.8L Diesel, Corvette, GTO, LaCrosse, Malibu (2004-06) & Malibu Maxx, Vibe, XLR, 2004-05 Corvette & 1998-2002 Metro & Prizm
Vehicle: 1990 Oldsmobile 98 Regency 3.8 V6 GAS

Do not smoke or allow an open flame of any type when working on or near any fuel system related components. The highly flammable vapor mixtures may ignite, resulting in serious personal injury.

Prior to disconnecting fuel lines, the fuel system pressure must be relieved to prevent accidental spray of fuel.

After the battery has been disconnected and reconnected, some abnormal driveability symptoms may occur. The vehicle may need to be driven while the v...

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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1990 Oldsmobile 98 AUTOMOBILES

CV AXLE SHAFT, Replace
Vehicle: 1990 Oldsmobile 98 Regency 3.8 V6 GAS

  • Raise and support vehicle, then remove tire and wheel assembly.
  • Install a brass drift or a screwdriver to prevent rotor from turning.
  • Remove shaft nut and washer.
  • Remove brake caliper from steering knuckle and suspend caliper assembly.
  • Remove rotor from hub and bearing assembly, then stabilizer shaft or link from control arm.
  • Remove ball joint from steering knuckle.
  • Remove drive axle from transaxle using axle shaft remover tool No. J-33008, a...

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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1990 Oldsmobile 98 AUTOMOBILES

Starter, Replace
Vehicle: 1990 Oldsmobile 98 Regency Touring 3.8 V6 GAS

When removing starter, note if any shims are used between the starter and mounting surface. If shims are found, reinstall in original locations.

If starter is noisy during cranking, remove one .015 inch double shim or add one .015 inch single shim to the outer bolt. If starter makes a high pitched whine after engine start, add .01...

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MAINTENANCE LAMP RESET PROCEDURES FOR 1990 Oldsmobile 98 AUTOMOBILES

General Motors Corp./Saturn Cars -> Check Engine Or Service Now Soon Engine Indicator Lamps (Gasoline Engines w/Electronic Engine Controls Or EFI) -> Except LeMans, Metro, Prizm, Storm & Vibe
Vehicle: 1990 Oldsmobile 98 Regency Brougham 3.8 V6 GAS

The Check Engine lamp should light when the ignition is turned On. When the engine is started, the lamp should go off. If the lamp remains on for 10 seconds or constantly after the engine is started, the self diagnosis system has detected a fault condition and has stored a code in the system Electronic Control Module (ECM) or Powertrain Control Module (PCM). After diagnosis and repair, the ECM memory can be cleared of codes as follows:

On models except Cadillac with DEFI, remove the ECM/PCM fuse or disconnect the battery ground cable for approximately 30...

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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1990 Oldsmobile 98 AUTOMOBILES

Coolant Hose, Replace -> Lower -> Upper
Vehicle: 1990 Oldsmobile 98 Regency Brougham 3.8 V6 GAS

Lower

  • Drain coolant into a suitable container.
  • Loosen hose clamp connecting hose to radiator.
  • Loosen hose clamp connecting hose to water pump inlet.
  • Remove hose from vehicle.
  • Reverse procedure t...

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SERPENTINE BELT SERVICE PROCEDURES FOR 1990 Oldsmobile 98 AUTOMOBILES

Serpentine Drive Belt, Replace
Vehicle: 1990 Oldsmobile 98 Regency 3.8 V6 GAS

  • Rotate tensioner counterclockwise, using a suitable tool to re...

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COMPONENT LOCATION DIAGRAMS FOR 1990 Oldsmobile 98 AUTOMOBILES

Component location diagrams for most 1990 Oldsmobile 98 cars and light trucks sold in the U.S. from 1990+.

Cruise Control Servo  Diagram for 1990 Oldsmobile 98 Regency Brougham 3.8 V6 GASCruise Control Servo Diagram for 1990 Oldsmobile 98 Regency Brougham 3.8 V6 GAS

Components on diagram:
  • Cruise Control Servo
  • Exhaust Gas Recirculation Module
  • Sequential Fuel Injection Components Location  Diagram for 1990 Oldsmobile 98 Regency Brougham 3.8 V6 GASSequential Fuel Injection Components Location Diagram for 1990 Oldsmobile 98 Regency Brougham 3.8 V6 GAS

    Components on diagram:
  • Fuel Tank Unit
  • Fuel Pump
  • Fuel Pump Relay
  • TCC Brake Switch
  • Assembly Line Diagnostic Link
  • CLICK HERE TO GET FULL ACCESS TO 1990 Oldsmobile 98 PARTS/COMPONENTS LOCATION DIAGRAMS!

    WIRING DIAGRAMS FOR 1990 Oldsmobile 98 AUTOMOBILES

    OEM drawn wiring diagrams for most 1990 Oldsmobile 98 cars and light trucks sold in the U.S.

    1990 Oldsmobile 98 Regency Brougham 3.8 V6 GAS Wiring Diagram1990 Oldsmobile 98 Regency Brougham 3.8 V6 GAS Wiring Diagram

    Components on diagram:
  • Blower Relay
  • Heater And A/C Control Assembly
  • Blower Switch
  • Blower Motor
  • Blower Resistor Assembly
  • 1990 Oldsmobile 98 Regency 3.8 V6 GAS Wiring Diagram1990 Oldsmobile 98 Regency 3.8 V6 GAS Wiring Diagram

    Components on diagram:
  • Turn Hazard Switch
  • Radio
  • Heater and Radio Control Interface Module
  • Steering Wheel Pad Switch And Electronic Module
  • Turn Signal Cancel Cam
  • CLICK HERE TO GET FULL ACCESS TO 1990 Oldsmobile 98 WIRING DIAGRAMS!

    TECHNICAL SERVICE BULLETINS FOR 1990 Oldsmobile 98 AUTOMOBILES

    OEM TSB listings for most 1990 Oldsmobile 98 cars and light trucks sold in the U.S. from 1985+.

    Document: Car and Truck Fix It Right the First Time Issues
    Vehicle: 1990 Oldsmobile 98 Regency 3.8 V6 GAS

    Auto Systems:
  • Labor Times, Manuals, Warranty, Aids
  • Document: GM TIRE WARRANTY PROGRAM CLAIMS GOODWILL GUIDELINES - REVISED
    Vehicle: 1990 Oldsmobile 98 Regency 3.8 V6 GAS

    Auto Systems:
  • Labor Times, Manuals, Warranty, Aids
  • Wheels, Tires, Wheel Bearings, Seals, Hubs
  • CLICK HERE TO GET FULL ACCESS TO 1990 Oldsmobile 98 TECHNICAL SERVICE BULLETINS!

    COMPONENT/PARTS SPECIFICATIONS FOR 1990 Oldsmobile 98 AUTOMOBILES

    BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1990 Oldsmobile 98 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 1990 Oldsmobile 98 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 1990 Oldsmobile 98 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 1990 Oldsmobile 98 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

    CLICK HERE TO GET FULL ACCESS TO 1990 Oldsmobile 98 SPECIFICATIONS DATA!

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    Click here to view more details about 1992 Oldsmobile 98 Harmonic Balancer1992 Oldsmobile 98 Harmonic Balancer, A high quality, OE replacement harmonic balancer; Backed by 1-year, unlimited-mileage warranty..

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    $70.09

    Click here to view more details about 1994 Oldsmobile 98 Engine Harmonic Balancer1994 Oldsmobile 98 Engine Harmonic Balancer, A high quality, direct fit OE replacement harmonic balancer; With limited lifetime warranty..

    Source: Auto Body Parts Store

    $32.36

    Click here to view more details2004 Oldsmobile Bravada Center High Mount Stop Light, Center High Mount Stop Light; Except XUV Model, , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $72.50

    Click here to view more details1984 Oldsmobile 98 Regency V8, 5 L, 307 CID Rebuilt Engine, Non roller, Smog., Warranty: 3-Year/100,000 Mile, .

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    $1,487.00

    Click here to view more details1995 Oldsmobile 98 Used A/C Compressor, 3.8, AUTO, FWD Without SUPERCHARGER, Very Good.

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    $125.00

    Click here to view more details1989 Oldsmobile 98 Used Condenser Assembly, 4.9, COL, FWD, Very Good.

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    $89.00
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