Alfa Romeo2005–2010Technical specifications

159 1.9 JTDM: Technical specifications

Workshop data for the 1.9-litre diesel (engine code 939A1.000). 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 (939A1.000) 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: 939A1.000

Performance & efficiency

Power: 88 kW (120 hp)
Engine size: 1,910 cc
Cylinders: 4 · OHC
Compression ratio: 18:1
Fuel system: Bosch

Fluids & capacities

Engine oil (with the filter): 4.6 litres

All 90 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	4/OHC
Capacity cc	1910
Compression ratio :1	18
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	150-1350
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 1.9 JTDM (2005–2010) is 1-3-4-2.

Injection sequence	1-3-4-2

Valve clearances

Valve clearances for the Alfa Romeo 159 1.9 JTDM (2005–2010) are 0,25-0,35 mm inlet and 0,30-0,40 mm exhaust, measured cold.

Valve clearance - INLET mm	0,25-0,35 cold
Valve clearance - EXHAUST mm	0,30-0,40 cold

Engine oil & fluids

Engine oil

The Alfa Romeo 159 1.9 JTDM (2005–2010) takes 4.6 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 2.1 litres. The specified oil is SAE 75W-85 synthetic, with classification GL-4.

Coolant

The listed total cooling-system capacity is 7.5 litres.

Grades, filling conditions and capacities

Lubricants and capacities — complete reference
Engine oil options
Ambient temperature range	All temperatures
Engine oil grade SAE	5W-30 Synthetic
Engine oil classification OEM	Fiat 9.55535-S1
Engine oil classification API/ACEA	/C2
Engine with filter(s) litres	4.6
Other lubricants and capacities
Manual transmission oil grade SAE	75W-85 Synthetic
Manual transmission oil classification	GL-4
Manual transmission litres	2.1
Cooling system - total capacity litres	7.5
Brake fluid Type	DOT 4
Power steering fluid Type	Dexron III

Brakes & wear limits

Brake disc thickness

Brake discs on the Alfa Romeo 159 1.9 JTDM (2005–2010) 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

Battery

The Alfa Romeo 159 1.9 JTDM (2005–2010) uses a 12 V, 60 Ah battery (reserve capacity 380 minutes).

Battery V/RC(Ah)	12/380 (60)

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 (%)	1,72 (52)

Service checks and adjustments

Oil pressure bar/rpm	4,0-4,5/4000
Radiator cap bar	0,98
Thermostat opens °C	86-90

Tightening torques

Cylinder head bolt torque

The cylinder head bolts on the Alfa Romeo 159 1.9 JTDM (2005–2010) are tightened in 3 stages: 90°, then 90°, then a final 90°.

Cylinder head
Tighten	35±3 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±1 Nm
Main bearings Stage 2	100°
Big end bearings Renew bolts/nuts	No
Big end bearings Stage 1	25±1 Nm
Big end bearings Stage 2	60°
Sump bolts	—
Sump drain bolt	20±2 Nm
Flywheel/driveplate	160±16 Nm
Clutch pressure plate	25±2 Nm
Crankshaft pulley/damper centre bolt	340±17 Nm
Crankshaft pulley/damper bolts	25±2 Nm
Camshaft sprocket/gear	30±1 Nm+40°
Camshaft carrier/cap	—
Camshaft/rocker cover	9±1 Nm
Inlet manifold to cylinder head	25±2 Nm
Exhaust manifold to cylinder head	25±2 Nm
Exhaust downpipe to manifold	19±7 Nm
Water pump	23±3 Nm
Injector/clamp	26-32 Nm
Injector pipe unions	23±1 Nm
Fuel/injection pump sprocket/gear	50±5 Nm
Fuel/injection pump mounting	26±2 Nm
Glow plugs	14±1 Nm
Crankshaft position (CKP) sensor/engine speed (RPM) sensor	8±2 Nm
Camshaft position (CMP) sensor	9±1 Nm
Engine oil pressure switch	26±2 Nm
Oil filter	9±1 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 to carrier Front	—
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 injection sequence of the Alfa Romeo 159 1.9 JTDM?

The injection sequence for the Alfa Romeo 159 1.9 JTDM (2005–2010) is 1-3-4-2.

How much oil does the Alfa Romeo 159 1.9 JTDM take?

The Alfa Romeo 159 1.9 JTDM (2005–2010) takes 4.6 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 1.9 JTDM?

Valve clearances for the Alfa Romeo 159 1.9 JTDM (2005–2010) are 0,25-0,35 mm inlet and 0,30-0,40 mm exhaust, measured cold.

What is the cylinder head torque for the Alfa Romeo 159 1.9 JTDM?

The cylinder head bolts on the Alfa Romeo 159 1.9 JTDM (2005–2010) are tightened in 3 stages: 90°, then 90°, then a final 90°.

What is the minimum brake disc thickness for the Alfa Romeo 159 1.9 JTDM?

Brake discs on the Alfa Romeo 159 1.9 JTDM (2005–2010) are replaced at a minimum thickness of 26 mm (ventilated) front and 10 mm rear.

What battery does the Alfa Romeo 159 1.9 JTDM use?

The Alfa Romeo 159 1.9 JTDM (2005–2010) uses a 12 V, 60 Ah battery (reserve capacity 380 minutes).