1991 Mitsubishi 3000GT / SL / VR-4 Service Manual (OEM)

• 1,146-page official factory service document detailing the 1991 Mitsubishi 3000GT, 3000GT SL, and 3000GT VR-4 (including FWD, AWD, and turbo variants).
• Volume 1 first edition covering Engine, Chassis & Body for the Z10-series build.
• Contains 47 group-indexed sections, hundreds of technical diagrams, and comprehensive torque-specification tables.
• Outlines foundational mechanical specifications and identification data for the platform launch.
• Covers the propeller shaft, front axle, rear axle, limited-slip differential, viscous coupling, drive shaft, power plant mount, and wheel and tire assemblies.
• Details the 4-Wheel Steering System (4WS), Electronic Control Suspension (ECS), Anti-lock Braking System (ABS), Active Aero System, Active Exhaust System, Cruise Control System, ETACS unit, and heater, air conditioner and ventilation.

Document Content Overview

Mechanics need reliable baseline data, and this Volume 1 PDF edition delivers exactly that. By providing exact factory clearance tolerances and diagnostic testing values, it prevents improper alignments and trial-and-error component replacement, allowing technicians to confidently set up complex AWD and twin-turbo powertrain geometries to avoid costly shop comebacks. It starts with the basics: vehicle identification codes, safety certification labels, and specific lifting and towing procedures for both FWD and AWD drivetrain configurations. From there, the documentation dives deeply into the 2,972 cc V6 DOHC engine. You will find exhaustive breakdowns of internal lubrication circuits alongside maintenance schedules for the timing belt, oil filter, and cooling system.

Before initiating any heavy structural or powertrain teardowns, always verify load capacities, follow proper shop safety protocols, and observe Supplemental Restraint System (SRS) precautions to avoid accidental air bag deployment. Please note that this overview details the manual's technical contents and data points, rather than providing step-by-step repair instructions for every single component. However, this manual does provide detailed, step-by-step procedures for complex tasks that typically require an expensive dealership visit, such as complete manual and automatic transaxle overhauls, 4-Wheel Steering System (4WS) bleeding, Anti-lock Braking System (ABS) hydraulic unit inspection, and Electronic Control Suspension (ECS) self-diagnosis.

Moving beyond the engine bay, the text categorizes necessary data for fuel supply, exhaust, and emissions control. You get freezing-point-to-specific-gravity charts for the cooling system as well as heavy technical depth for both manual and automatic transaxles. Sections dedicated to steering, suspension, and braking lay out necessary service specifications. It even covers interior components like the Supplemental Restraint System (SRS). Exploded-view diagrams tie directly to tightening-torque specifications, giving you exact bolt and nut values in Nm and ft-lbs to ensure everything goes back together accurately. To further support your diagnostic workflow, the text is heavily illustrated with wiring diagrams, circuit diagrams, harness and component layout diagrams, cross-sectional views, oscilloscope waveform views, and standard tooth contact pattern charts.

Technical Data Preview

Want an idea of the specifications inside? Engine cooling system capacity for all 1991 models is strictly documented at 8.0 liters (8.5 US quarts). Service data specifies a crankshaft main bearing oil clearance of 0.019 to 0.044 mm (0.0007 to 0.0017 in.). In the cylinder head specification tables, intake valve clearance is listed at 0.02 to 0.05 mm (0.0008 to 0.0020 in.).

The publication also outlines exact OEM parameters for engine assembly and camshaft oil seal replacement. You will find spark plug gap ranges specified at 1.0 to 1.1 mm (0.039 to 0.043 in.). Cylinder head bolts and crankshaft pulley torque settings are clearly defined, giving you the exact data required for a professional review and assembly process. (Note: A specific publication part number is not explicitly listed in this volume's preview).