1991-1995 Mitsubishi Sigma Service Manual

Technical Scope for the 1991–1995 Mitsubishi Sigma and Diamante

• Covers 1991–1995 Mitsubishi Sigma and Diamante sedans, including SOHC and DOHC 6G72 V6 engine variants with 5-speed manual or 4-speed automatic transmissions.
• Official Mitsubishi Motors publication P/N PWGE9004-D, featuring multiple revisions from 1990 through 1994.
• Contains over 100 pages of technical illustrations, exploded-view assembly diagrams, and torque specification tables for major engine and chassis components.
• Accessible from your device as soon as the order is placed.
• Laid out for standard letter and A4 printing.
• This technical manual provides the exact assembly, lubrication, and identification data required for factory-level maintenance on the 6G72-series powerplant.

Component and Systems Documentation

This Mitsubishi Sigma and Diamante 1991–1995 service manual provides comprehensive factory-level documentation across critical powertrain and chassis areas. The document structure begins with detailed vehicle identification, model code breakdown, and chassis number location, transitioning into complete specifications for the 6G72 SOHC and DOHC engines. Chapters focus on service adjustment procedures for drive belt tension, ignition timing, and idle speed, while separate sections detail the lubrication system, including engine oil cooler removal and replacement. The material further documents the supplemental restraint system (SRS), outlining construction and safety precautions, alongside technical sections for fuel system components, including multi-point injection diagrams.

Engine and Torque Reference Data

Engine identification data, including serial number cycles and displacement metrics, is extensively catalogued for both 6G72 SOHC and DOHC builds. Torque values for standard bolts and flange bolts are provided in Nm, kgm, and ft-lbs to ensure precision assembly across the engine block, cylinder head, and oil pan. The 6G72 V6 total displacement is documented at 2,972 cc (181.3 cu. in.) with a compression ratio of 10.0. Crankshaft front oil seal installation is described with specific technical tool usage. Intake valve clearance specifications are listed for maintenance reference, and the multi-point injection system is detailed through various wiring diagrams and sensor location maps. All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work. This 1991–1995 Mitsubishi Sigma service manual is an essential reference document for the 6G72-powered flagship sedan, providing comprehensive technical data for professional maintenance, system diagnostics, and mechanical overhaul procedures.

Document Reference: Mitsubishi Motors Publication PWGE9004-D, 1991–1994 revisions