Alfa Romeo 155 1998 All Service Repair Manual

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Basic Information Identification Make: Alfa Romeo Model: 155 Year: 1998 Generation Generation Code: Type 167 Codes Chassis Code: 167 Introduction Market Position Market Position: The Alfa Romeo 155 was a...

Type: Cars

Sku: 491940

Tags: 155 Alfa Romeo

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Description

Basic Information
Identification
Make:	Alfa Romeo
Model:	155
Year:	1998
Generation
Generation Code:	Type 167
Codes
Chassis Code:	167

Introduction
Market Position
Market Position:	The Alfa Romeo 155 was a compact executive car produced by the Italian manufacturer Alfa Romeo from 1992 to 1997. For 1998, this manual covers the continuation of the model range or potentially later production runs. It targeted buyers looking for a sporty yet practical sedan with distinct Italian styling and driving dynamics.
Target Audience:	DIY enthusiasts, independent mechanics, and Alfa Romeo owners seeking to perform their own maintenance and repairs, saving money and ensuring quality.
Competitive Analysis
Competitive Analysis:	Competed against vehicles like the BMW 3 Series, Mercedes-Benz C-Class, Audi A4, and certain models from Volvo and Saab. The 155 differentiated itself with its unique styling, spirited engine options, and renowned Alfa Romeo handling characteristics.
Key Features
Key Features:	The 1998 Alfa Romeo 155, particularly its later iterations, offered a blend of performance and comfort. Known for its engaging driving experience, stylish Italian design, and often sophisticated interior appointments depending on trim level.
Manual Value Proposition:	Empowers owners to maintain their Alfa Romeo 155 confidently, potentially saving significant costs on labor from dealerships or independent workshops. Provides the knowledge base for informed decision-making regarding repairs.

Manual Details
Coverage Areas
Coverage Areas:	General Maintenance, Troubleshooting, Engine Service/Repair, Transmission Service/Repair, Brake System, Wiring Diagram, Electrical System, Suspension, Periodic Lubrication, Steering, Cooling System, Fuel Injection/Fuel System, Emission System, Engine Control System, Chassis/Body, Restraint System, Axle, and more.
Page Count
Page Count:	N/A (Digital Download)
Manual Type
Manual Type:	Service and Repair Manual
Language
Language:	English
Format
Format:	PDF

Manual Coverage
Systems Covered
Systems Covered:	Engine mechanicals (including cylinder head, block, pistons, crankshaft, camshafts), Fuel system (injection, pump, lines, injectors), Ignition system, Cooling system (radiator, thermostat, water pump, hoses), Lubrication system (oil pump, filter, passages), Exhaust system (manifold, catalytic converter, mufflers), Transmission (manual and automatic, clutches, gears, linkages), Drivetrain (differentials, driveshafts, CV joints), Suspension (front and rear, springs, shock absorbers, bushings), Steering system (rack and pinion, power steering pump, fluid), Braking system (discs, pads, calipers, lines, master cylinder, ABS), Electrical system (battery, alternator, starter, lighting, fuses, relays, wiring harnesses), Body and chassis (frame, body panels, doors, interior trim, glass), HVAC system (heating, ventilation, air conditioning), Restraint system (airbags, seatbelts), Wheels and tires.
Engine Control System Coverage:	Detailed information on engine control units (ECU), sensors (e.g., MAP, TPS, O2, crankshaft position), actuators (e.g., injectors, ignition coils), and diagnostic trouble codes (DTCs) specific to the 155's engine management systems.
Chassis Body Coverage:	Instructions for servicing and repairing structural components, body panels, doors, hinges, latches, windows, and interior trim. Includes body rust repair techniques, panel alignment, and repair of subframes.
Steering System Coverage:	Detailed procedures for diagnosing and repairing power steering pump leaks, steering rack wear, power steering fluid flush, and steering column adjustments. Includes identification of steering components and their functions.
Suspension Coverage:	Diagnosis and replacement of front struts, rear shock absorbers, control arms, ball joints, bushings, and sway bar links. Includes wheel bearing replacement and suspension alignment procedures.
Transmission Coverage:	Manual gearbox internal inspection and repair, clutch assembly replacement, torque converter service for automatics, transmission mount replacement, and troubleshooting of gear selection issues.
Electrical System Coverage:	Comprehensive coverage of the entire electrical system, including starter motor operation, alternator charging system, battery maintenance, lighting circuits (headlights, taillights, interior), dashboard warning lights, and wiring harness repair.
Procedures Included
Procedures Included:	Routine maintenance (oil changes, filter replacements, inspections), Diagnostic procedures for common faults, Component removal and installation, Repair and overhaul of major mechanical systems, Electrical system troubleshooting using wiring diagrams, Adjustment and calibration of engine and chassis components, Brake bleeding and component replacement, Suspension alignment and component replacement, Clutch operation and adjustment, Transmission fluid changes and seal replacements, Body panel alignment and repair, HVAC system servicing.
Engine Repair Procedures:	Complete engine disassembly, inspection, and reassembly instructions for both Twin Spark and V6 engines. Includes cylinder head gasket replacement, piston ring installation, crankshaft bearing checks, valve timing setup, and engine balancing.
Electrical Troubleshooting Procedures:	Step-by-step diagnostic guides for electrical faults using provided wiring diagrams. Includes procedures for testing starters, alternators, fuses, relays, lighting circuits, instrument cluster issues, and power window/lock systems.
Brake System Procedures:	Front and rear brake pad and disc replacement, caliper overhaul, brake line and hose inspection and replacement, master cylinder troubleshooting, brake fluid bleeding procedures, and ABS component diagnosis.
Fuel System Procedures:	Fuel pump testing, fuel pressure regulator checks, injector cleaning and replacement, fuel filter replacement, and diagnosis of fuel delivery issues. Covers both carbureted and fuel-injected systems if applicable to specific 1998 models.
Cooling System Procedures:	Radiator removal and replacement, water pump seal inspection, thermostat testing, coolant hose replacement, fan clutch/electric fan diagnosis, and system pressure testing.
Wiring Diagram Interpretation:	Detailed explanation on how to read and use the provided wiring diagrams to trace circuits, identify components, and diagnose electrical faults. Color-coded diagrams are typically included.
Technical Depth
Technical Depth:	Comprehensive, covering everything from basic scheduled maintenance to advanced component overhaul and troubleshooting. Includes detailed torque specifications, component clearances, diagnostic flowcharts, and wiring diagrams.
Diagnostic Tools:	While not explicitly listing specific scan tools, the manual would guide users on symptoms and potential causes, implying the use of basic diagnostic tools like multimeters and pressure gauges.

Manual Specifications
File Format
File Format:	PDF
Software Requirements:	Requires Adobe PDF Reader and WinZip or equivalent decompression software.
Print Quality
Print Quality:	Digital high resolution, suitable for on-screen viewing and printing.
Usability On Devices:	Compatible with all versions of Windows and Mac operating systems for on-screen viewing and printing.
Binding Type
Binding Type:	N/A (Digital Download)
Paper Type
Paper Type:	N/A (Digital Download)

Engine Specifications
Primary Engine
Primary Engine Options 1998:	While specific engines for a 1998 model year may vary by market, typical 155 engines included the Twin Spark four-cylinder and the V6 Busso engine. The 2.0L Twin Spark (16-valve) producing around 150 hp and the 2.5L V6 producing around 165-190 hp were common. Diesel variants were also available in some markets.
Engine Codes Common:	Common Twin Spark engine codes might include AR32103 (16V), and V6 codes like AR16101. Manual would provide specific VIN decoding to identify the exact engine.
Performance
Typical Performance V6:	The 2.5 V6 variants could achieve 0-60 mph in approximately 8.0-8.5 seconds, with a top speed around 135-140 mph. Horsepower and torque figures would be detailed within the manual for specific engine codes.
Typical Performance Twin Spark:	The 2.0L Twin Spark could achieve 0-60 mph in approximately 9.0-9.5 seconds. The manual would provide detailed performance metrics for various engine variants.
Fuel System
Fuel System Type:	Electronic Fuel Injection (EFI), often multi-point injection (MPI) or sequential multi-point injection (SFI) depending on the engine variant. The manual would detail specific system components, pressures, and diagnostic procedures.

Transmission
Standard
Standard Transmission:	Typically a 5-speed manual transmission was standard on most models.
Optional
Optional Transmission:	An automatic transmission was often available as an option, particularly on V6 models.
Features
Transmission Features:	Manual transmissions offered direct engagement, while automatic transmissions provided convenience. The manual would cover clutch operation, gear selection mechanisms, fluid types (e.g., SAE 75W-90 GL-4 for manual, ATF for automatic), and rebuild procedures.

Dimensions
Exterior
Exterior Dimensions Approximate:	Length: ~4400 mm, Width: ~1700 mm, Height: ~1420 mm. Wheelbase: ~2570 mm. (Exact dimensions vary by specific body style and trim).
Interior
Interior Features:	Seating for five, with a focus on driver ergonomics. Interior materials varied by trim, often featuring sport seats and premium finishes in higher specifications. Cargo space was typical for its class.
Cargo
Cargo Capacity Approximate:	Around 440-480 liters (trunk space), expandable with folding rear seats in some configurations.
Weights
Curb Weight Approximate:	1300-1450 kg, depending on engine and equipment.

Safety Features
Ratings
Safety Ratings:	Euro NCAP and other independent crash test results for the 155 vary. Later models and specific trims would likely have improved safety features. The manual would cover the operation and maintenance of safety systems.
Active Features
Active Safety Features:	Anti-lock Braking System (ABS) was widely available. Traction control (ASR) was an option on some higher-spec models. Power steering contributed to active safety.
Passive Features
Passive Safety Features:	Frontal airbags for driver and passenger. Seatbelt pretensioners. Crumple zones designed into the chassis. Side impact protection bars in doors.

Technology Features
Infotainment
Infotainment Systems:	Base models featured basic AM/FM radios with cassette players. Higher trims offered upgraded audio systems, often with CD compatibility and more speakers. The manual would detail radio removal and speaker replacement procedures.
Driver Assistance
Driver Assistance Features:	ABS was the primary driver assistance system. Some advanced models may have had limited traction control. Cruise control was available on some variants.
Connectivity
Connectivity Features:	Limited by 1998 standards. Primarily focused on audio system connectivity. Remote central locking and immobilizer systems were becoming more common.

Maintenance
Service Intervals
Typical Service Intervals:	Oil and filter change: Every 10,000-15,000 km or 12 months. Air filter: Every 20,000-30,000 km. Spark plugs: Every 40,000-60,000 km (Twin Spark). Timing belt: Critical item, typically every 50,000-70,000 km or 5 years for Twin Spark engines. V6 engines often used timing chains or belts with longer intervals. Coolant: Every 2-3 years. Brake fluid: Every 2 years. The manual provides precise intervals based on engine and driving conditions.
Differential Fluid Interval:	Rear differential fluid (for Q4 models) typically every 30,000-40,000 km. Manual would specify SAE 75W-90 GL-5.
Transmission Fluid Change Interval:	Manual transmission fluid change: Every 60,000-80,000 km. Automatic transmission fluid and filter change: Every 40,000-50,000 km.
Fluid Specifications
Fluid Specifications:	Engine Oil: Selenia K-Series 10W-40 or equivalent API SG/SH, ACEA A2-96. Coolant: Paraflu UP (or equivalent ethylene glycol based antifreeze with corrosion inhibitors). Brake Fluid: DOT 4. Power Steering Fluid: ATF Dexron II/III. Gearbox Oil (Manual): SAE 75W-90 GL-4. Automatic Transmission Fluid: ATF Dexron II/III.
Known Issues
Common Issues:	Rust on sills and wheel arches. Degradation of rubber components (bushings, hoses). Electrical gremlins are not uncommon in older Alfas, particularly wiring harnesses and connectors. Twin Spark engines can be susceptible to oil consumption if not properly maintained. The Q4 AWD system requires specific maintenance. Gearbox synchromesh wear in manual transmissions.
Engine Control Unit Issues:	While not as prevalent as other issues, some ECU failures can occur over time, particularly with age and heat exposure. The manual's diagnostic section is crucial here.

Vehicle History
Brand Heritage
Brand Heritage:	Alfa Romeo has a rich history dating back to 1910, renowned for producing sporty, stylish, and engaging automobiles with a strong motorsport pedigree. The 155 carried this heritage forward.
Model Evolution
Model Evolution:	The Alfa Romeo 155 replaced the 75 and was succeeded by the 156. It was significant for introducing front-wheel drive to Alfa Romeo's sedan lineup for the first time, alongside its iconic four-wheel-drive 'Q4' variant. The 1998 model year represents the latter part of its production run, potentially with minor updates or facelifts.
Production
Production Period:	1992-1997 (Original production run). The 1998 manual suggests coverage of models that might have been sold in the 1998 calendar year.

Awards & Recognition
Recognitions
Recognitions:	The Alfa Romeo 155 was noted for its performance and handling, particularly the Q4 variant which was successful in touring car racing (DTM). While specific consumer awards might be scarce for the 1998 model year in isolation, the 155 platform generally received praise for its driving dynamics.