Alfa Romeo2005–2010Technical specifications

159 2.4 JTDM 20V: Technical specifications

Workshop data for the 2.4-litre diesel (engine code 939A3.000). 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 (939A3.000) to the vehicle before ordering parts or applying these figures.

Vehicle specifications

Overview

Make: Alfa Romeo
Model: 159
Years: 2005–2010
Fuel: Diesel
Engine code: 939A3.000

Performance & efficiency

Power: 147 kW (200 hp)
Engine size: 2,387 cc
Cylinders: 5 · DOHC
Compression ratio: 17.0:1
Fuel system: Bosch

Fluids & capacities

Engine oil (with the filter): 6.4 litres

All 92 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	5/DOHC
Capacity cc	2387
Compression ratio :1	17,0
Fuel system Make	Bosch
Fuel system Type	EDC 16 C39

Injection system

Air metering Type	Mass
Fuel/injection pump assembly Make	Bosch
Pump type	Common rail
Fuel main pump delivery pressure bar	150-1400
Fuel feed/lift pump delivery pressure bar	3,5 Min
Injector Ohm	0,3-0,7

Injection sequence

The injection sequence for the Alfa Romeo 159 2.4 JTDM 20V (2005–2010) is 1-2-4-5-3.

Injection sequence	1-2-4-5-3

Valve clearances

Valve clearances on the Alfa Romeo 159 2.4 JTDM 20V (2005–2010) 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 2.4 JTDM 20V (2005–2010) takes 6.4 litres of engine oil with the filter.

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

Manual gearbox

The manual gearbox has a listed capacity of 2.6 litres. The specified oil is SAE 75W-85 synthetic, with classification GL-4.

Coolant

The listed total cooling-system capacity is 7.35 litres.

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-N2
Engine oil classification API/ACEA	CF/B4
Engine with filter(s) litres	6.4
Other lubricants and capacities
Manual transmission oil grade SAE	75W-85 Synthetic
Manual transmission oil classification	GL-4
Manual transmission litres	2.6
Cooling system - total capacity litres	7.35
Brake fluid Type	DOT 4
Power steering fluid Type	Dexron III

Brakes & wear limits

Brake disc thickness

Brake discs on the Alfa Romeo 159 2.4 JTDM 20V (2005–2010) are replaced at a minimum thickness of 26 mm (ventilated) front and 20 mm rear.

Minimum disc thickness for replacement - ventilated Front	26 mm
Minimum disc thickness for replacement Rear	20 mm

Service & electrical

Battery

The Alfa Romeo 159 2.4 JTDM 20V (2005–2010) uses a 12 V, 70 Ah battery (reserve capacity 450 minutes).

Battery V/RC(Ah)	12/450 (70)

Tuning and emissions

Idle speed rpm	850±20
Oil temperature °C	80
Maximum time at governed speed secs	1,0
Test mode A/B	B
Probe type 1/2	1
Smoke opacity - homologation value m-1 (%)	1,71 (51)

Service checks and adjustments

Turbo boost pressure bar/rpm	0,9-1,08/3500
Oil pressure bar/rpm	4,0-4,5/4000
Radiator cap bar	0,98
Thermostat opens °C	78-82

Tightening torques

Cylinder head bolt torque

The cylinder head bolts on the Alfa Romeo 159 2.4 JTDM 20V (2005–2010) are tightened in 4 stages: 20 Nm, then 90°, then 90°, then a final 90°.

Cylinder head
Renew bolts	Yes
Tighten	20 Nm
Tighten	65±3 Nm
Tighten	90°
Tighten	90°
Tighten	90°

Other engine tightening torques
Cylinder head instructions	—
Main bearings Renew bolts/nuts	No
Main bearings Stage 1	25 Nm
Main bearings Stage 2	100°
Big end bearings Renew bolts/nuts	No
Big end bearings Stage 1	25 Nm
Big end bearings Stage 2	60°
Oil pump to cylinder block	11±2 Nm
Sump bolts	9 Nm M8=25 Nm
Sump drain bolt	20±2 Nm
Flywheel/driveplate	160±16 Nm
Clutch pressure plate	28 Nm
Crankshaft pulley/damper centre bolt	385±55 Nm
Crankshaft pulley/damper bolts	25±2 Nm
Camshaft sprocket/gear	30±1 Nm+40°
Camshaft/rocker cover	10 Nm
Inlet manifold to cylinder head	25 Nm
Exhaust downpipe to manifold	24±2 Nm
Injector/clamp	25±3 Nm
Injector pipe unions	23±1 Nm
Fuel/injection pump sprocket/gear	50 Nm
Fuel/injection pump mounting	25 Nm
Crankshaft position (CKP) sensor/engine speed (RPM) sensor	23±5 Nm
Camshaft position (CMP) sensor	9±1 Nm
Engine oil pressure switch	34±6 Nm
Oil filter	36 Nm
Chassis tightening torques
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/carrier to hub Front	160±8 Nm
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 injection sequence of the Alfa Romeo 159 2.4 JTDM 20V?

The injection sequence for the Alfa Romeo 159 2.4 JTDM 20V (2005–2010) is 1-2-4-5-3.

How much oil does the Alfa Romeo 159 2.4 JTDM 20V take?

The Alfa Romeo 159 2.4 JTDM 20V (2005–2010) takes 6.4 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 2.4 JTDM 20V?

Valve clearances on the Alfa Romeo 159 2.4 JTDM 20V (2005–2010) are hydraulic — they self-adjust, so no manual clearance figure applies.

What is the cylinder head torque for the Alfa Romeo 159 2.4 JTDM 20V?

The cylinder head bolts on the Alfa Romeo 159 2.4 JTDM 20V (2005–2010) are tightened in 4 stages: 20 Nm, then 90°, then 90°, then a final 90°.

What is the minimum brake disc thickness for the Alfa Romeo 159 2.4 JTDM 20V?

Brake discs on the Alfa Romeo 159 2.4 JTDM 20V (2005–2010) are replaced at a minimum thickness of 26 mm (ventilated) front and 20 mm rear.

What battery does the Alfa Romeo 159 2.4 JTDM 20V use?

The Alfa Romeo 159 2.4 JTDM 20V (2005–2010) uses a 12 V, 70 Ah battery (reserve capacity 450 minutes).