1985 Buick Regal Service and Repair Manual

This factory service and repair manual for the 1985 Buick Regal is for a car offered only as a two-door coupe, in Base, Grand National, Limited and T-Type trims. That single body sat over five overhead-valve engines: a 3.8L V6 with or without turbocharging, a 5.0L V8 on gasoline, and diesel V6 and V8 units of 4.3L and 5.7L. The turbocharged and diesel versions carry their own fuel and induction hardware, and the specifications and diagnostics address the fuel and induction systems.

Engines covered

• 3.8L V6 (231 cu in) — OHV, naturally aspirated, gasoline
• 3.8L V6 (231 cu in) — OHV, turbocharged, gasoline
• 4.3L V6 (260 cu in) — OHV, naturally aspirated, diesel
• 5.0L V8 (305 cu in) — OHV, naturally aspirated, gasoline
• 5.7L V8 (350 cu in) — OHV, naturally aspirated, diesel

Body styles covered

• 2-door coupe

Trims covered

• Base
• Grand National
• Limited
• T-Type

Known issues on the 1985 Regal. Gasoline and diesel engines shared this one coupe body on the 1985 Regal. Procedures, specifications and diagnostics address the gasoline and diesel fuel systems, the ignition system and the turbocharged V6's induction. Torque values run through the engine, transmission and drivetrain, and the brakes, suspension, steering and the coupe's electrical system and body are handled with wiring diagrams and specifications.