Engine & identification
Vehicle identification
| No. of cylinders Type | 4/OHC |
|---|---|
| Capacity cc | 2499 |
| Compression ratio :1 | 21,6 |
Injection system
| Fuel/injection pump assembly Make | Zexel |
|---|---|
| Pump type | Rotary |
| Nozzle opening pressure - new/used bar | 113,7-121,6/100 |
| Engine coolant temperature (ECT) sensor Ohm/°C | 290-340/80 |
Injection sequence
The injection sequence for the Mazda B Series 2.5 (1998–2002) is 1-3-4-2.
| Injection sequence | 1-3-4-2 |
|---|
Valve clearances
Valve clearances for the Mazda B Series 2.5 (1998–2002) are 0,05-0,15 mm inlet and 0,15-0,25 mm exhaust, measured cold.
| Valve clearance - INLET mm | 0,05-0,15 cold |
|---|---|
| Valve clearance - EXHAUST mm | 0,15-0,25 cold |
Engine oil & fluids
Engine oil
The Mazda B Series 2.5 (1998–2002) takes 6.3 litres of engine oil with the filter.
See the reference table for the complete engine oil entries and their conditions.
Manual gearbox
See the reference table for the complete manual gearbox entries and their conditions.
Transfer box
The transfer box has a listed capacity of 2.0 litres.
See the reference table for the complete transfer box entries and their conditions.
Coolant
The listed total cooling-system capacity is 9.4 litres.
Grades, filling conditions and capacities
| Engine oil options | |
|---|---|
| Ambient temperature range | ➞30°C |
| Engine oil grade SAE | 5W-30 |
| Engine oil classification API/ACEA | CF/B1, B3, B4, B5 |
| Ambient temperature range | -15°C➞40°C |
| Engine oil grade SAE | 10W-30 |
| Engine oil classification API/ACEA | CF/B3, B4 |
| Ambient temperature range | -25°C➞45°C |
| Engine oil grade SAE | 10W-40 |
| Engine oil classification API/ACEA | CF/B3 |
| Engine with filter(s) litres | 6.3 |
| Other lubricants and capacities | |
| Manual transmission oil grade SAE | — |
| Manual transmission oil classification | GL-4/5 |
| Manual transmission litres | — |
| Differential oil grade - front SAE | 90W |
| Differential oil classification - front | GL-5 |
| Differential front/AT litres | 1.2-1.5 |
| Differential oil grade - rear SAE | 90W |
| Differential oil classification - rear | GL-5 |
| Differential rear litres | 1,4 4x4=1,9 |
| Transfer box oil grade SAE | — |
| Transfer box oil classification | GL-4/5 |
| Transfer box litres | 2.0 |
| Cooling system - total capacity litres | 9.4 |
| Brake fluid Type | DOT 3/4 |
| Brake fluid litres | 1.1 |
| Clutch fluid Type | DOT 3/4 |
| Power steering fluid Type | Dexron II/ATF M-III |
Brakes & wear limits
Brake disc thickness
Brake discs on the Mazda B Series 2.5 (1998–2002) are replaced at a minimum thickness of 22 mm (ventilated) or 22,8 mm (ventilated) front; the rear brake drums are replaced at a maximum diameter of 271,5 mm.
| Minimum disc thickness for replacement - ventilated Front | 22 mm |
|---|---|
| Minimum disc thickness after refacing - ventilated Front | 22,8 mm |
| Maximum drum diameter for replacement Rear | 271,5 mm |
Brake disc and drum dimensions
| Disc runout Front | 0,05 mm |
|---|---|
| Minimum pad thickness Front | 2 mm |
| Minimum shoe thickness Rear | 1 mm |
| Parking brake travel No. of notches | 1-7 |
Service & electrical
Tuning and emissions
| Plunger travel (pump) mm ABDC | 1,0±0,05 |
|---|---|
| Crankshaft position (n = ATDC) °BTDC | 10 n |
| Adjusting method Engine/Pump | Pointer/Dial gauge |
| Idle speed rpm | 720±20 |
| Rated no load speed rpm | 4750-5050 |
| Oil temperature °C | 60 |
| Idle speed - for smoke test rpm | 670-770 |
| Governed speed range - for smoke test rpm | 4750-5050 |
| Maximum time at governed speed secs | 1,0 |
| Test mode A/B | B |
| Probe type 1/2 | 1 |
| Smoke opacity - EU limit m-1 (%) | 3,00 (73) |
| Smoke opacity - homologation value m-1 (%) | 2,50 (66) |
Starting and charging
| Battery V/RC(Ah) | 12.0 |
|---|---|
| Maximum cranking amps A | 130 |
| Alternator output A/V/rpm | 74/13,5/2000 |
Service checks and adjustments
| Compression pressure bar | 26,0-29,0 |
|---|---|
| Oil pressure bar/rpm | 4,5-5,3/3000 |
| Radiator cap bar | 0,94-1,22 |
| Thermostat opens °C | 80-84 |
| Drive belt tension - alternator/PAS/AC mm | 7,0-9,0 |
| Drive belt tension - AC mm | 9,5-11,8 |
Tightening torques
| Cylinder head instructions | — |
|---|---|
| View more information | — |
| Other engine tightening torques | |
| Main bearings Stage 1 | — |
| View more information | — |
| Big end bearings Renew bolts/nuts | No |
| Big end bearings Stage 1 | 30±2 Nm |
| Big end bearings Stage 2 | 90°±7° |
| Oil pump to cylinder block | 22±3 Nm |
| Sump bolts | 9±1 Nm |
| Sump drain bolt | 36±5 Nm |
| Flywheel/driveplate | 100±2 Nm |
| Clutch pressure plate | 22±4 Nm |
| Crankshaft pulley/damper centre bolt | 370±20 Nm |
| Camshaft sprocket/gear | 132±8 Nm |
| Camshaft carrier/cap | 13±1 Nm |
| Camshaft/rocker cover | 7±2 Nm |
| Inlet manifold to cylinder head | 22±3 Nm |
| Exhaust manifold to cylinder head | 21±1 Nm |
| Exhaust downpipe to manifold | 45±6 Nm |
| Water pump | 22±3 Nm |
| Injector/clamp | 64±4 Nm |
| Injector pipe unions | 27±2 Nm |
| Injector nozzle to holder | 39±10 Nm |
| Fuel/injection pump sprocket/gear | 64±4 Nm |
| Fuel/injection pump flange | 22±3 Nm |
| Fuel/injection pump mounting | 22±3 Nm |
| Glow plugs | 18±2 Nm |
| Engine coolant temperature (ECT) sensor | 20±3 Nm |
| Engine oil pressure switch | 15±2 Nm |
| Chassis tightening torques | |
| Front hub | 4x4=274±40 Nm |
| Steering wheel | 45±4 Nm |
| Steering rack/box mounting | 46±8 Nm |
| Steering track rod end | 52±6 Nm |
| Steering box drop arm | 216±19 Nm |
| Brake disc to hub Front | 61±7 Nm |
| Brake caliper to carrier Front | 32±2 Nm |
| Brake caliper/carrier to hub Front | 118±9 Nm |
| ABS sensor Front | 22±3 Nm |
| ABS sensor Rear | 22±3 Nm |
| Road wheels | 103±14 Nm |
Air conditioning
| No. of AC service connectors | 2 |
|---|---|
| Air conditioning restrictor type | Expansion valve |
| Compressor clutch/magnetic coupling | Yes |
| Compressor variable displacement solenoid | No |
| Air conditioning refrigerant Type | R134a |
| Air conditioning refrigerant quantity grams | 550 |
| Air conditioning oil group | PAG |
| Air conditioning oil Type | FD46XG |
| Air conditioning oil quantity cm³ | 180 |
| Air conditioning oil viscosity ISO | 46 |
Frequently asked questions
What is the injection sequence of the Mazda B Series 2.5?
The injection sequence for the Mazda B Series 2.5 (1998–2002) is 1-3-4-2.
How much oil does the Mazda B Series 2.5 take?
The Mazda B Series 2.5 (1998–2002) takes 6.3 litres of engine oil with the filter. See the reference table for the complete engine oil entries and their conditions.
What are the valve clearances for the Mazda B Series 2.5?
Valve clearances for the Mazda B Series 2.5 (1998–2002) are 0,05-0,15 mm inlet and 0,15-0,25 mm exhaust, measured cold.
What is the minimum brake disc thickness for the Mazda B Series 2.5?
Brake discs on the Mazda B Series 2.5 (1998–2002) are replaced at a minimum thickness of 22 mm (ventilated) or 22,8 mm (ventilated) front; the rear brake drums are replaced at a maximum diameter of 271,5 mm.