1990 Oldsmobile 98 Service and Repair Manual
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1990 Oldsmobile 98 Service and Repair Manual
This factory service and repair manual for the 1990 Oldsmobile 98 covers Regency, Regency Brougham and Regency Touring sedans with four doors. A gasoline-burning 3.8L V6 is the sole engine, naturally aspirated and built on an overhead-valve layout with 231 cubic inches of displacement. Because body, engine and fuel stay the same, trim level is the main thing that separates one car from another.
Engines covered
- 3.8L V6 (231 cu in) — OHV, naturally aspirated, gasoline
Body styles covered
- 4-door sedan
Trims covered
- Regency
- Regency Brougham
- Regency Touring
Known issues on the 1990 98. NHTSA lists 18 complaints for the 1990 98: hydraulic brakes 4, then engine and engine cooling, structure and vehicle speed control at 3 each, and the electrical system at 2. Among those filings, 3 mention an injury, while a crash and a fire were each reported in 1 complaint. The manual provides procedures, specifications and torque values for the brakes, engine and cooling system, and wiring diagrams and diagnostics for the electrical system and cruise control.