Alfa Romeo2005–2009Technical specifications

159 2.2 JTS: Technical specifications

Workshop data for the 2.2-litre petrol (engine code 939A5.000). 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 (939A5.000) to the vehicle before ordering parts or applying these figures.

Vehicle specifications

Overview

Make: Alfa Romeo
Model: 159
Years: 2005–2009
Fuel: Petrol
Engine code: 939A5.000

Performance & efficiency

Power: 136 kW (185 hp)
Engine size: 2,198 cc
Cylinders: 4 · DOHC
Compression ratio: 11.3:1
Fuel system: Bosch

Fluids & capacities

Engine oil (with the filter): 5.4 litres

All 109 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	4/DOHC
Capacity (Fiscal) cc	2198
Compression ratio :1	11,3
Suitable for unleaded petrol	Yes
Minimum octane rating RON	95
Ignition system Make	Bosch
Ignition system Type	Motronic MED7.6.1
Ignition system Description	Map-DI
Trigger location	Cam/Crankshaft
Fuel system Make	Bosch
Fuel system Type	Motronic MED7.6.1
Fuel system Description	MFI-s
Air metering Type	Mass
Combined ignition and fuel ECM	Yes
Diagnostic socket	Yes

Ignition system

Ignition coil Type	ZS-K
Ignition coil supply voltage + with ballast V	12,0
Distributor (ECM) Make	(Bosch)

Firing order

The firing order for the Alfa Romeo 159 2.2 JTS (2005–2009) is 1-3-4-2.

Firing order	1-3-4-2

Valve clearances

Valve clearances on the Alfa Romeo 159 2.2 JTS (2005–2009) 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 Alfa Romeo 159 2.2 JTS (2005–2009) takes 5.4 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.

Coolant

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

Grades, filling conditions and capacities

Lubricants and capacities — complete reference
Engine oil options
Ambient temperature range	All temperatures
Engine oil grade SAE	5W-40 Synthetic
Engine oil classification OEM	Fiat 9.55535-H2
Engine oil classification API/ACEA	SM/A3
Engine with filter(s) litres	5.4
Other lubricants and capacities
Manual transmission oil grade SAE	75W-85 Synthetic
Manual transmission oil classification	GL-4
Manual transmission litres	2.3
Auto shift manual (ASM) transmission oil grade SAE	75W-85 Synthetic
Auto shift manual (ASM) transmission oil classification	GL-4
Auto shift manual (ASM) transmission (drain & refill) litres	2.3
Auto shift manual (ASM) transmission
Auto shift manual (ASM) transmission hydraulic control fluid Type	Tutela Car CS Speed
Auto shift manual (ASM) transmission hydraulic control fluid classification	Fiat 9.55550-SA1
Auto shift manual (ASM) transmission hydraulic control fluid litres	0.7
Auto shift manual (ASM) transmission hydraulic control fluid
Cooling system - total capacity litres	8.2
Brake fluid Type	DOT 4
Power steering fluid Type	Dexron III
Power steering fluid
Power steering fluid litres	1.3

Brakes & wear limits

Brake disc thickness

Brake discs on the Alfa Romeo 159 2.2 JTS (2005–2009) are replaced at a minimum thickness of 26 mm (ventilated) front and 10 mm rear.

Minimum disc thickness for replacement - ventilated Front	26 mm
Minimum disc thickness for replacement Rear	10 mm

Service & electrical

Ignition timing

The ignition timing on the Alfa Romeo 159 2.2 JTS (2005–2009) is not adjustable.

Ignition timing - basic BTDC °Engine/rpm	Not adjustable

Battery

The Alfa Romeo 159 2.2 JTS (2005–2009) uses a 12 V, 60 Ah battery.

Battery V/RC(Ah)	12 (60)

Tuning and emissions

Ignition advance checks °Engine/rpm	ECM Controlled
Idle speed rpm	800±50 Not adjustable
Oil temperature °C	80
CO level at idle speed - tailpipe Vol. % CO	0,5 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	2500-2900
CO content at increased idle speed Vol. %	0,2
Lambda at increased idle λ	0,97-1,03

Starting and charging

Alternator output A/V/rpm	65/14/1800-6000

Service checks and adjustments

Oil pressure bar/rpm	4-6/750-850
Radiator cap bar	0,98
Thermostat opens °C	82±2

Fuel system

Fuel pump delivery pressure bar	4,5

Spark plugs

Spark plugs Original equipment	NGK
Spark plug Type	FR5CP
Spark plugs Make	NGK
Spark plug Type	FR5CP

Tightening torques

Cylinder head bolt torque

The cylinder head bolts on the Alfa Romeo 159 2.2 JTS (2005–2009) are tightened in 3 stages: 27-33 Nm, then 100°, then a final 65°.

Cylinder head
Tighten	27-33 Nm
Tighten	100°
Tighten	65°

Other engine tightening torques
Cylinder head instructions	—
Main bearings Renew bolts/nuts	No
Main bearings Stage 1	20 Nm+70°
Main bearings Stage 2	15° M8=23 Nm
Big end bearings Renew bolts/nuts	Yes
Big end bearings Stage 1	25 Nm+50°
Big end bearings Stage 2	50°+10°
Sump bolts	18-22 Nm
Sump drain bolt	22-27 Nm
Flywheel/driveplate	48-58 Nm+25°
Clutch pressure plate	23-28 Nm
Crankshaft pulley/damper centre bolt	90-110 Nm+75°
Camshaft sprocket/gear	90-110 Nm
Camshaft carrier/cap	—
Camshaft carrier/cap
Camshaft/rocker cover	7-9 Nm
Inlet manifold to cylinder head	18-22 Nm
Exhaust manifold to cylinder head	22-26 Nm
Exhaust downpipe to manifold	22-26 Nm
Water pump	23 Nm
Spark plugs	18-22 Nm
Engine coolant temperature (ECT) sensor	21 Nm
Lambda sensor (Oxygen)	45±5 Nm
Knock sensor (KS)	16-20 Nm
Oil filter	23-28 Nm
Chassis tightening torques
Front hub	—
Front hub
Front hub - wheel bearing housing bolts	102±10 Nm
Rear hub - wheel bearing housing bolts	70±7 Nm
Steering wheel	50±5 Nm
Steering rack/box mounting	126±12 Nm+180°
Steering track rod end	100±10 Nm
Brake disc to hub Front	7±1 Nm
Brake caliper to carrier Front	—
Brake caliper to carrier
Brake caliper/carrier to hub Front	—
Brake disc to hub Rear	7±1 Nm
Brake caliper to carrier Rear	35±3 Nm
Brake caliper/carrier to hub Rear	57±3 Nm
ABS sensor Front	9±2 Nm
ABS sensor Rear	9±2 Nm
Road wheels	120±12 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	460
Air conditioning oil group	PAG
Air conditioning oil Type	ZXL 100 PG
Air conditioning oil quantity cm³	130
Air conditioning oil viscosity ISO	46

Frequently asked questions

What is the firing order of the Alfa Romeo 159 2.2 JTS?

The firing order for the Alfa Romeo 159 2.2 JTS (2005–2009) is 1-3-4-2.

How much oil does the Alfa Romeo 159 2.2 JTS take?

The Alfa Romeo 159 2.2 JTS (2005–2009) takes 5.4 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 Alfa Romeo 159 2.2 JTS?

Valve clearances on the Alfa Romeo 159 2.2 JTS (2005–2009) are hydraulic — they self-adjust, so no manual clearance figure applies.

What is the cylinder head torque for the Alfa Romeo 159 2.2 JTS?

The cylinder head bolts on the Alfa Romeo 159 2.2 JTS (2005–2009) are tightened in 3 stages: 27-33 Nm, then 100°, then a final 65°.

What is the ignition timing for the Alfa Romeo 159 2.2 JTS?

The ignition timing on the Alfa Romeo 159 2.2 JTS (2005–2009) is not adjustable.

What is the minimum brake disc thickness for the Alfa Romeo 159 2.2 JTS?

Brake discs on the Alfa Romeo 159 2.2 JTS (2005–2009) are replaced at a minimum thickness of 26 mm (ventilated) front and 10 mm rear.