Mazda2016–2018Technical specifications

6 2.5: Technical specifications

Workshop data for the 2.5-litre petrol (engine code SKYACTIV-G 2,5). Covers engine, fluids, brakes, service, torques and air conditioning: the figures to check before a job or a parts order.

Common faults & fixes

Summary

Match the engine code (SKYACTIV-G 2,5) to the vehicle before ordering parts or applying these figures.

Vehicle specifications

Overview

Make: Mazda
Model: 6
Years: 2016–2018
Fuel: Petrol
Engine code: SKYACTIV-G 2,5

Performance & efficiency

Power: 141 kW (192 hp)
Engine size: 2,488 cc
Cylinders: 4 · DOHC
Compression ratio: 13.0:1
Fuel system: Mazda

Fluids & capacities

Engine oil (with the filter): 4.5 litres

All 111 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	4/DOHC
Capacity (Fiscal) cc	2488
Compression ratio :1	13,0
Suitable for unleaded petrol	Yes
Minimum octane rating RON	95
Ignition system Description	Map-DI
Trigger location	Cam/Crankshaft
Fuel system Make	Mazda
Fuel system Description	MFI-s(d)
Air metering Type	Mass/MAP
Combined ignition and fuel ECM	Yes
Diagnostic socket	Yes

Ignition system

Ignition coil supply voltage + with ballast V	12,0

Firing order

The firing order for the Mazda 6 2.5 (2016–2018) is 1-3-4-2.

Firing order	1-3-4-2

Valve clearances

Valve clearances on the Mazda 6 2.5 (2016–2018) are hydraulic — they self-adjust, so no manual clearance figure applies.

Valve clearance - INLET mm	Hydraulic
Valve clearance - EXHAUST mm	Hydraulic

Engine oil & fluids

Engine oil

The Mazda 6 2.5 (2016–2018) takes 4.5 litres of engine oil with the filter.

See the reference table for the complete engine oil entries and their conditions.

Coolant

See the reference table for the complete coolant entries and their conditions.

Grades, filling conditions and capacities

Lubricants and capacities — complete reference
Preferred engine oil
Ambient temperature range	All temperatures
Engine oil grade SAE	0W-20, 5W-30
Engine oil options
Ambient temperature range	-35°C➞40°C
Engine oil grade SAE	0W-20
Engine oil classification API/ACEA	SL/A3,A5
Ambient temperature range	-30°C➞40°C
Engine oil grade SAE	5W-30
Engine oil classification API/ACEA	SL/A3, A5
Engine with filter(s) litres	4.5
Other lubricants and capacities
Automatic transmission fluid Type	ATF FZ
Automatic transmission (drain & refill) litres	3.3
View more information	—
Automatic transmission fluid
Automatic transmission (dry fill) litres	7.8
Automatic transmission fluid (ATF) (dry fill)
Coolant Type	FL22
Coolant Colour	Green
Cooling system - total capacity litres	7.3
Brake fluid Type	DOT 3/4

Brakes & wear limits

Brake disc thickness

Brake discs on the Mazda 6 2.5 (2016–2018) are replaced at a minimum thickness of 26 mm (ventilated) or 26,8 mm (ventilated) front and 8 mm or 8,8 mm rear.

Minimum disc thickness for replacement - ventilated Front	26 mm
Minimum disc thickness after refacing - ventilated Front	26,8 mm
Minimum disc thickness for replacement Rear	8 mm
Minimum disc thickness after refacing Rear	8,8 mm

Brake disc and drum dimensions

Disc thickness variation Front	0,015 mm
Disc thickness variation Rear	0,015 mm
Disc runout Front	0,04 mm
Disc runout Rear	0,10 mm
Minimum pad thickness Front	2 mm
Minimum pad thickness Rear	2 mm

Service & electrical

Tuning and emissions

Idle speed and ignition timing
Tuning conditions	—
Ignition timing - basic BTDC °Engine/rpm	12/600±50 Not adjustable
Ignition advance checks °Engine/rpm	ECM Controlled
Idle speed rpm	600±50 Not adjustable
Oil temperature °C	80
CO level at idle speed - tailpipe Vol. % CO	0,2 Max Not adjustable
HC level at idle speed ppm	100
CO2 level at idle speed Vol. % CO2	14,5-16
O2 level at idle speed Vol. % O2	0,1-0,5
Increased idle speed for CO test rpm	2500-3000
CO content at increased idle speed Vol. %	0,2
Lambda at increased idle λ	0,97-1,03

Starting and charging

Battery V/RC(Ah)	12
Maximum cranking amps A	90
Alternator output A/V/rpm	83-105/13-15/1000-2000

Service checks and adjustments

Oil pressure
Compression pressure bar	7,4-9,8
Oil pressure bar/rpm	1,1-1,7/1500
Radiator cap bar	0,93-1,22
Thermostat opens °C	80-84

Fuel system

Fuel main pump delivery pressure bar	4,1-4,9
Engine coolant temperature (ECT) sensor Ohm/°C	318/80
Injector Ohm	1,2-2,0
Lambda sensor (Oxygen) heater Ohm	2,0-50,0

Spark plugs

Spark plugs Original equipment	Mazda
Spark plug Type	PE5R/S-18-110
Electrode gap mm	1,05-1,40
Spark plugs Make	NGK
Spark plug Type	ILKAR7L11

Tightening torques

Cylinder head
Cylinder head instructions	—
View more information	—
Maximum bolt length	146,5 mm
Tighten	15±2 Nm
Tighten	45±2 Nm
Tighten	90°±5°
Tighten	90°±5°
Other engine tightening torques
Main bearings Stage 1	—
View more information	—
Install bedplate within 10 minutes.
Big end bearings Stage 1	—
View more information	—
Big end bearings
Oil pump to cylinder block	—
Oil pump to cylinder block
Sump bolts	—
View more information	—
Assemble components within 10 minutes. Ensure sealant does not enter bolt holes.
Sump drain bolt	36±5 Nm
Flywheel/driveplate	-/112±4 Nm
Crankshaft pulley/damper centre bolt	100±10 Nm+60°±5°
Camshaft sprocket/gear	—
Camshaft sprocket/gear
Camshaft carrier/cap	1)5±1 Nm 2)10±1 Nm
View more information	—
Camshaft carrier/cap
Camshaft/rocker cover	7 Nm
View more information	—
Assemble components within 10 minutes. Excess sealant can cause engine damage.
Inlet manifold to cylinder head	18±2 Nm
Exhaust manifold to cylinder head	—
View more information	—
Exhaust manifold to cylinder head
Exhaust downpipe to manifold	45±6 Nm
Water pump	23±3 Nm
Spark plugs	18±2 Nm
Fuel rail	23±3 Nm
Crankshaft position (CKP) sensor/engine speed (RPM) sensor	9±1 Nm
Camshaft position (CMP) sensor	9±1 Nm
Engine coolant temperature (ECT) sensor	20±3 Nm
Lambda sensor (Oxygen)	42±12 Nm
Knock sensor (KS)	20±3 Nm
Engine oil pressure switch	15±2 Nm
Oil filter	14±2 Nm
Chassis tightening torques
Front hub	—
Front/rear hub
Front hub - wheel bearing housing bolts	94±8 Nm
Rear hub - wheel bearing housing bolts	94±8 Nm
Steering wheel	48±6 Nm
Steering rack/box mounting	90±14 Nm
Steering track rod end	53±6 Nm
Steering track rod end
Brake caliper to carrier Front	35±4 Nm
Brake caliper/carrier to hub Front	101±9 Nm
Brake caliper to carrier Rear	35±4 Nm
Brake caliper/carrier to hub Rear	94±8 Nm
ABS sensor Front	9±1 Nm
ABS sensor Rear	9±1 Nm
Road wheels	128±19 Nm

Air conditioning

Do not mix R134a with R1234yf.
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	—
Air conditioning refrigerant quantity grams	—
Refrigerant quantity
Air conditioning oil group	PAG
Air conditioning oil Type	FD46XG
Air conditioning oil quantity cm³	100
Air conditioning oil viscosity ISO	46

Frequently asked questions

What is the firing order of the Mazda 6 2.5?

The firing order for the Mazda 6 2.5 (2016–2018) is 1-3-4-2.

How much oil does the Mazda 6 2.5 take?

The Mazda 6 2.5 (2016–2018) takes 4.5 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 6 2.5?

Valve clearances on the Mazda 6 2.5 (2016–2018) are hydraulic — they self-adjust, so no manual clearance figure applies.

What is the minimum brake disc thickness for the Mazda 6 2.5?

Brake discs on the Mazda 6 2.5 (2016–2018) are replaced at a minimum thickness of 26 mm (ventilated) or 26,8 mm (ventilated) front and 8 mm or 8,8 mm rear.