Alfa Romeo2001–2006Technical specifications

156 1.9 JTD: Technical specifications

Workshop data for the 1.9-litre diesel (engine code 371.01). 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 (371.01) to the vehicle before ordering parts or applying these figures.

Vehicle specifications

Overview

Make: Alfa Romeo
Model: 156
Years: 2001–2006
Fuel: Diesel
Engine code: 371.01

Performance & efficiency

Power: 81 kW (110 hp)
Engine size: 1,910 cc
Cylinders: 4 · OHC
Compression ratio: 18.4:1
Fuel system: Bosch

Fluids & capacities

Engine oil (with the filter): 4.2 litres

All 100 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	4/OHC
Capacity cc	1910
Compression ratio :1	18,4
Fuel system Make	Bosch
Fuel system Type	EDC 15C

Injection system

Fuel/injection pump assembly Make	Bosch
Pump type	Common rail
Fuel main pump delivery pressure bar	150-1350
Injector nozzle Make	Bosch

Injection sequence

The injection sequence for the Alfa Romeo 156 1.9 JTD (2001–2006) is 1-3-4-2.

Injection sequence	1-3-4-2

Valve clearances

Valve clearances for the Alfa Romeo 156 1.9 JTD (2001–2006) 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 156 1.9 JTD (2001–2006) takes 4.2 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 2.0 litres.

See the reference table for the complete manual gearbox entries and their conditions.

Coolant

The listed total cooling-system capacity is 6.1 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 API/ACEA	CF/B3
Ambient temperature range	-15°C➞
Engine oil grade SAE	10W-40 Synthetic
Engine oil classification API/ACEA	CF/B3
Engine with filter(s) litres	4.2
Other lubricants and capacities
Manual transmission oil grade SAE	75W-85 Synthetic
Manual transmission oil classification	GL-4+
Manual transmission litres	2.0
Cooling system - total capacity litres	6.1
Brake fluid Type	DOT 4
Brake fluid litres	0.6
Power steering fluid Type	Dexron II
Power steering fluid litres	1.3

Brakes & wear limits

Brake disc thickness

Brake discs on the Alfa Romeo 156 1.9 JTD (2001–2006) are replaced at a minimum thickness of 13,2 mm (solid) front and 9 mm rear.

Minimum disc thickness for replacement - solid Front	13,2 mm
Minimum disc thickness for replacement Rear	9 mm

Brake disc and drum dimensions

Disc runout Front	0,15 mm
Disc runout Rear	0,15 mm
Minimum pad thickness Front	1,5 mm
Minimum pad thickness Rear	1,5 mm
Parking brake travel No. of notches	1-3

Service & electrical

Battery

The Alfa Romeo 156 1.9 JTD (2001–2006) uses a 12 V, 50 Ah battery.

Battery V/RC(Ah)	12 (50)

Tuning and emissions

Crankshaft position (n = ATDC) °BTDC	—
Adjusting method Engine/Pump	Pointer
Idle speed rpm	850±30
Oil temperature °C	80
Idle speed - for smoke test rpm	750-950
Governed speed range - for smoke test rpm	4900-5100
Maximum time at governed speed secs	1,0
Test mode A/B	B
Probe type 1/2	1
Conditioning Accelerations/rpm	2-3
Smoke opacity - EU limit m-1 (%)	3,00 (73)
Smoke opacity - homologation value m-1 (%)	1,48 (47)

Starting and charging

Alternator output A/V/rpm	85/12/2000

Service checks and adjustments

Oil pressure bar/rpm	2,5-3,0/4000
Radiator cap bar	0,98
Thermostat opens °C	78-82

Tightening torques

Cylinder head bolt torque

The cylinder head bolts on the Alfa Romeo 156 1.9 JTD (2001–2006) are tightened in 4 stages: 65 Nm, then 90°, then 90°, then a final 90°.

Cylinder head
Renew bolts	No
Tighten	65 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	10 Nm
Sump bolts	—
Sump drain bolt	20 Nm
Flywheel/driveplate	150 Nm
Clutch pressure plate	28±3 Nm
Crankshaft pulley/damper centre bolt	306-378 Nm
Camshaft sprocket/gear	120 Nm
Camshaft carrier/cap	16 Nm
Camshaft/rocker cover	10 Nm
Inlet manifold to cylinder head	25±2 Nm
Exhaust manifold to cylinder head	25±2 Nm
Exhaust downpipe to manifold	83 Nm
Injector/clamp	30 Nm
Injector pipe unions	22 Nm
Fuel/injection pump sprocket/gear	50±5 Nm
Fuel/injection pump mounting	25±2 Nm
Glow plugs	15 Nm
Engine coolant temperature (ECT) sensor	20 Nm
Engine oil pressure switch	20 Nm
Chassis tightening torques
Front hub	70 Nm+62°
Rear hub	320 Nm
Steering wheel	50 Nm
Steering track rod end	30 Nm
Brake disc to hub Front	8-13 Nm
Brake caliper to carrier Front	50 Nm
Brake caliper/carrier to hub Front	152 Nm
Brake disc to hub Rear	8-13 Nm
Brake caliper to carrier Rear	50 Nm
Brake caliper/carrier to hub Rear	52 Nm
ABS sensor Front	5 Nm
ABS sensor Rear	5 Nm
Road wheels	—

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	650
Air conditioning oil Type	SP20
Air conditioning oil quantity cm³	130
Air conditioning oil viscosity ISO	100

Frequently asked questions

What is the injection sequence of the Alfa Romeo 156 1.9 JTD?

The injection sequence for the Alfa Romeo 156 1.9 JTD (2001–2006) is 1-3-4-2.

How much oil does the Alfa Romeo 156 1.9 JTD take?

The Alfa Romeo 156 1.9 JTD (2001–2006) takes 4.2 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 156 1.9 JTD?

Valve clearances for the Alfa Romeo 156 1.9 JTD (2001–2006) 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 156 1.9 JTD?

The cylinder head bolts on the Alfa Romeo 156 1.9 JTD (2001–2006) are tightened in 4 stages: 65 Nm, then 90°, then 90°, then a final 90°.

What is the minimum brake disc thickness for the Alfa Romeo 156 1.9 JTD?

Brake discs on the Alfa Romeo 156 1.9 JTD (2001–2006) are replaced at a minimum thickness of 13,2 mm (solid) front and 9 mm rear.

What battery does the Alfa Romeo 156 1.9 JTD use?

The Alfa Romeo 156 1.9 JTD (2001–2006) uses a 12 V, 50 Ah battery.