Mazda Mazda 626 1997-2002 2.5L V6 Engine Specifications
Explore the detailed technical specifications of the 2.5L V6 engine in the 1997-2002 Mazda 626. Learn about horsepower, torque, fuel system, and more for maintenance, repair, and upgrades.
Overview Specifications
This document provides detailed specifications and technical information about the 2.5L V6 engine used in the 1997-2002 Mazda 626. It is designed for enthusiasts, mechanics, and anyone seeking in-depth knowledge about this engine. The content is organized into sections covering engine performance, design, maintenance, and key specifications. Use the search and navigation instructions to quickly find the information you need.
How to Use
Use the search bar to enter keywords related to the 2.5L V6 engine, such as 'horsepower' or 'torque'. Results will highlight relevant sections and subsections for easy access.
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Key Specifications
Horsepower
170 hp @ 6000 rpm
Torque
165 lb-ft @ 4000 rpm
Displacement
2.5 liters (2497 cc)
Compression Ratio
9.0:1
Fuel Efficiency
22 MPG (combined)
Available Specifications
Engine Performance
This section covers the performance characteristics of the 2.5L V6 engine, including horsepower, torque, and fuel efficiency. It also includes details about acceleration and top speed capabilities.
Engine Performance
This section covers the performance characteristics of the 2.5L V6 engine, including horsepower, torque, and fuel efficiency. It also includes details about acceleration and top speed capabilities.
Power Output
- Horsepower: 170 hp @ 6000 rpm
- Torque: 165 lb-ft @ 4000 rpm
- Redline: 6500 rpm
- Compression Ratio: 9.0:1
- Fuel System: Sequential Multi-Port Fuel Injection
- Fuel Type: Regular Unleaded
Fuel Efficiency
- City MPG: 19
- Highway MPG: 26
- Combined MPG: 22
- Fuel Tank Capacity: 16.9 gallons
- Emission Standards: LEV (Low Emission Vehicle)
Engine Design
This section provides an overview of the 2.5L V6 engine's design, including its configuration, materials, and key components. It also highlights the engine's durability and engineering features.
Engine Design
This section provides an overview of the 2.5L V6 engine's design, including its configuration, materials, and key components. It also highlights the engine's durability and engineering features.
Configuration and Layout
- Engine Type: V6
- Displacement: 2.5 liters (2497 cc)
- Cylinder Arrangement: 60-degree V-angle
- Valvetrain: DOHC (Dual Overhead Camshaft)
- Number of Valves: 24
- Bore x Stroke: 84.5 mm x 74.2 mm
Materials and Construction
- Block Material: Aluminum
- Cylinder Head Material: Aluminum
- Pistons: Forged Aluminum
- Crankshaft: Forged Steel
- Connecting Rods: Forged Steel
Maintenance and Service
This section outlines maintenance requirements and service intervals for the 2.5L V6 engine. It includes details about oil changes, spark plug replacement, and common troubleshooting tips.
Maintenance and Service
This section outlines maintenance requirements and service intervals for the 2.5L V6 engine. It includes details about oil changes, spark plug replacement, and common troubleshooting tips.
Service Intervals
- Oil Change: Every 5,000 miles or 6 months
- Spark Plugs: Replace every 30,000 miles
- Timing Belt: Replace every 60,000 miles
- Air Filter: Replace every 15,000 miles
- Coolant Flush: Every 30,000 miles
Common Issues
- Oil Leaks: Check valve cover gaskets
- Ignition Coil Failure: Replace as needed
- Throttle Body Cleaning: Recommended every 20,000 miles
- Coolant System: Inspect for leaks regularly
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Engine Specifications
Overview
- Type
- Naturally aspirated V6
- Configuration
- 60-degree V6
- Displacement
- 2.5 liters (2497 cc)
- Material
- Aluminum block and heads
- Location
- Front-engine, transverse
- Fuel System
- Sequential multi-port fuel injection
Dimensions
- Length
- 22.8 in (579 mm)
- Width
- 25.6 in (650 mm)
- Height
- 20.5 in (521 mm)
- Weight
- 330 lbs (150 kg)
- Bore
- 3.31 in (84 mm)
- Stroke
- 2.95 in (75 mm)
- Compression Ratio
- 9.2:1
- Oil Capacity
- 4.8 quarts (4.5 liters)
Materials
- Block
- Aluminum alloy
- Cylinder Heads
- Aluminum alloy
- Pistons
- Forged aluminum
- Crankshaft
- Forged steel
- Valves
- Stainless steel
Features
- Ignition System
-
- Distributorless ignition system
- Direct-fire ignition coils
- Platinum-tipped spark plugs
- Cooling System
-
- Cross-flow aluminum radiator
- Electric cooling fan
- Thermostatically controlled
- Fuel System
-
- Sequential multi-port fuel injection
- Returnless fuel system
- Electronic throttle control
- Emissions
-
- EGR (Exhaust Gas Recirculation)
- Catalytic converter
- OBD-II compliant
- Performance
-
- 170 hp @ 6000 rpm
- 165 lb-ft torque @ 4000 rpm
- Redline at 6500 rpm
Safety Features
- Engine Protection
-
- Low oil pressure warning
- Overheat warning
- Fail-safe cooling mode
- Emissions Control
-
- Catalytic converter
- EGR system
- Evaporative emissions control
Comfort Features
- Noise Reduction
-
- Hydraulic engine mounts
- Acoustic engine cover
- Tuned intake manifold
- Vibration Control
-
- Balanced crankshaft
- Dual-mass flywheel
- Hydraulic valve lifters
Accessories
- Belts
-
- Serpentine belt
- Timing belt
- Accessory drive belt
- Filters
-
- Oil filter
- Air filter
- Fuel filter
- Fluids
-
- Engine oil (5W-30)
- Coolant (50/50 mix)
- Power steering fluid
Maintenance
- Service interval
- Every 7,500 miles or 6 months
- Service Items
-
- Oil and filter change
- Inspect timing belt
- Check coolant level
- Inspect spark plugs
- Check engine mounts
- Maintenance Notes
- Timing belt replacement recommended every 60,000 miles
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Bumper-to-bumper
- Powertrain
- Miles: 60,000Years: 5Coverage: Engine, transmission, drivetrain
- Emissions
- Miles: 50,000Years: 2Coverage: Catalytic converter, EGR system
- Corrosion
- Miles: UnlimitedYears: 5Coverage: Perforation from corrosion
Production Details
- Manufacturer
- Mazda Motor Corporation
- Manufacturing Process
-
- Casting for block and heads
- CNC machining
- Assembly line production
- Quality Control
- inspection: 100% engine testingTolerances: Micron-level precisionTesting: Dyno and leak testing
- Sustainability Practices
-
- Recycled aluminum usage
- Low-emission manufacturing
- Waste reduction programs
- Production Metrics
- Units Per Day: 500Defect Rate: 0.1%Energy Usage: 15 kWh per engine
Service Information for 2.5l v6 engine Service
Maintenance and service requirements specific to this component
- Oil and filter change
- Inspect belts and hoses
- Check coolant level
- Inspect spark plugs
- Check engine mounts
Use only recommended 5W-30 oil
- Replace air filter
- Inspect fuel system
- Check ignition system
- Inspect exhaust system
- Test emissions system
Inspect for vacuum leaks
- Replace timing belt
- Replace water pump
- Flush cooling system
- Replace spark plugs
- Inspect valve clearance
Timing belt replacement critical to prevent engine damage
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 2.5L V6 engine compatible with other Mazda models from the same era?
Is the 2.5L V6 engine compatible with other Mazda models from the same era?
The 2.5L V6 engine used in the 1997-2002 Mazda 626 is primarily designed for this model. While it shares some components with other Mazda engines, direct compatibility with models like the MX-6 or Ford Probe is limited. Always verify part numbers and consult a service manual or professional mechanic before attempting cross-model installations.
Q2 What are the maintenance requirements for the 2.5L V6 engine?
What are the maintenance requirements for the 2.5L V6 engine?
The 2.5L V6 engine requires regular maintenance, including oil changes every 3,000-5,000 miles, spark plug replacement every 30,000 miles, and timing belt inspection every 60,000 miles. Coolant flushes, air filter replacements, and fuel system cleanings are also recommended to ensure optimal performance and longevity.
Q3 How do I replace the timing belt on the 2.5L V6 engine?
How do I replace the timing belt on the 2.5L V6 engine?
Replacing the timing belt on the 2.5L V6 engine involves removing the engine cover, accessory belts, and crankshaft pulley. Align the timing marks on the camshafts and crankshaft, then remove the old belt and install the new one. Ensure proper tension and reassemble components. Refer to the service manual for detailed instructions and torque specifications.
Q4 What should I do if the 2.5L V6 engine is overheating?
What should I do if the 2.5L V6 engine is overheating?
Overheating in the 2.5L V6 engine can result from a faulty thermostat, coolant leaks, or a malfunctioning water pump. Check coolant levels, inspect hoses for leaks, and test the radiator fan. If the issue persists, consult a professional to diagnose and repair the cooling system.
Q5 How can I optimize the performance of the 2.5L V6 engine?
How can I optimize the performance of the 2.5L V6 engine?
To optimize performance, use high-quality synthetic oil, upgrade to performance air filters, and ensure the ignition system is in good condition. Consider installing a performance exhaust system and tuning the engine for better fuel efficiency and power. Regular maintenance and timely repairs are essential for sustained performance.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
1997-2002 Mazda 626 Service Manual
Coming SoonComprehensive guide covering engine maintenance, repair procedures, and technical specifications for the 2.5L V6 engine.
Technical Service Bulletin: 2.5L V6 Engine Updates
Coming SoonDetails common issues, recalls, and updates for the 2.5L V6 engine used in the 1997-2002 Mazda 626.
Mazda 626 Parts and Accessories Catalog
Coming SoonCatalog listing OEM and aftermarket parts compatible with the 2.5L V6 engine and other components of the Mazda 626.
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Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.
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