Alfa Romeo1983–1987Technical specifications

6 2.5 Turbo: Technical specifications

Workshop data for the 2.5-litre diesel (engine code HR588HT). Covers engine, fluids, service and torques: the figures to check before a job or a parts order.

Summary

Match the engine code (HR588HT) to the vehicle before ordering parts or applying these figures.

Vehicle specifications

Overview

Make: Alfa Romeo
Model: 6
Years: 1983–1987
Fuel: Diesel
Engine code: HR588HT

Performance & efficiency

Power: 79 kW (107 hp)
Engine size: 2,494 cc
Cylinders: 5 · OHV
Compression ratio: 22.0:1

Fluids & capacities

Engine oil (with the filter): 6.0 litres

All 57 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	5/OHV
Capacity cc	2494
Compression ratio :1	22,0

Injection system

Fuel/injection pump assembly Make	Bosch
Fuel/injection pump assembly Type	VE
Fuel/injection pump assembly Part No.	0 460 415 003
Fuel/injection pump assembly Part No.	0 460 405 035
Fuel feed/lift pump delivery pressure bar	0,2
Injector nozzle Make	Bosch
Nozzle and holder assembly Part No.	0 432 297 047
Nozzle opening pressure - new/used bar	155/140

Injection sequence

The injection sequence for the Alfa Romeo 6 2.5 Turbo (1983–1987) is 1-2-4-5-3.

Injection sequence	1-2-4-5-3

Valve clearances

Valve clearances for the Alfa Romeo 6 2.5 Turbo (1983–1987) are 0,30 mm inlet and 0,45 mm exhaust, measured cold.

Valve clearance - INLET mm	0,30 cold
Valve clearance - EXHAUST mm	0,45 cold

Engine oil & fluids

Engine oil

The Alfa Romeo 6 2.5 Turbo (1983–1987) takes 6.0 litres of engine oil with the filter. The specified engine oil grade is SAE 15W-40 for moderate climates, with API/ACEA classification CD.

Manual gearbox

The specified manual gearbox oil is SAE 75W-90.

Coolant

The listed total cooling-system capacity is 10.0 litres.

Grades, filling conditions and capacities

Lubricants and capacities — complete reference
Engine oil options
Ambient temperature range	Moderate climate
Engine oil grade SAE	15W-40
Engine oil classification API/ACEA	CD
Engine with filter(s) litres	6.0
Other lubricants and capacities
Manual transmission oil grade SAE	75W-90
Cooling system - total capacity litres	10.0

Service & electrical

Battery

The Alfa Romeo 6 2.5 Turbo (1983–1987) uses a 12 V, 77 Ah battery.

Battery V/RC(Ah)	12 (77)

Glow plugs

Glow plugs for the Alfa Romeo 6 2.5 Turbo (1983–1987): Beru 657 MJ, Bosch 0 250 201 012, Champion CH70 and Lucas/CAV DS052.

Glow plug nominal rating V/A	11/13
Glow plug activation time secs	10 Max
Glow plug - part no. Beru	657 MJ
Glow plug - part no. Bosch	0 250 201 012
Glow plug - part no. Champion	CH70
Glow plug - part no. Lucas/CAV	DS052

Tuning and emissions

Plunger travel (pump) mm ABDC	0,88-0,90
Crankshaft position (n = ATDC) °BTDC	6
Adjusting method Engine/Pump	Pointer/Overflow
Idle speed rpm	800-850
Rated no load speed rpm	4800-4830

Starting and charging

Starter motor Make	Bosch
Starter motor Type	0 001 362 308
Alternator Make	Bosch
Alternator Type	0 120 489 107
Alternator output A/V/rpm	55/14/3000
Regulated voltage V	13,7-14,2

Service checks and adjustments

Compression pressure bar	22,0
Turbo boost pressure bar/rpm	0,39-0,45/4000
Oil pressure bar/rpm	3,5-6,0/-
Radiator cap bar	0,90-1,10
Thermostat opens °C	80
Drive belt size - alternator mm	9,5x1025
Drive belt tension - alternator/PAS/AC mm	20

Tightening torques

Other engine tightening torques
Cylinder head instructions	—
View more information	—
Big end bearings Stage 1	40 Nm
Big end bearings Stage 2	75-84 Nm
Flywheel/driveplate	108 Nm
Clutch pressure plate	20-25 Nm
Crankshaft pulley/damper centre bolt	147-157 Nm
Injector/clamp	27 Nm
Injector pipe unions	15-20 Nm
Fuel/injection pump sprocket/gear	88 Nm
Chassis tightening torques
Steering track rod end	44-54 Nm
Brake caliper/carrier to hub Front	78 Nm
Brake caliper/carrier to hub Rear	49 Nm
Road wheels	60-80 Nm

Frequently asked questions

What is the injection sequence of the Alfa Romeo 6 2.5 Turbo?

The injection sequence for the Alfa Romeo 6 2.5 Turbo (1983–1987) is 1-2-4-5-3.

What glow plugs does the Alfa Romeo 6 2.5 Turbo use?

Glow plugs for the Alfa Romeo 6 2.5 Turbo (1983–1987): Beru 657 MJ, Bosch 0 250 201 012, Champion CH70 and Lucas/CAV DS052.

How much oil does the Alfa Romeo 6 2.5 Turbo take?

The Alfa Romeo 6 2.5 Turbo (1983–1987) takes 6.0 litres of engine oil with the filter. The specified engine oil grade is SAE 15W-40 for moderate climates, with API/ACEA classification CD.

What are the valve clearances for the Alfa Romeo 6 2.5 Turbo?

Valve clearances for the Alfa Romeo 6 2.5 Turbo (1983–1987) are 0,30 mm inlet and 0,45 mm exhaust, measured cold.

What battery does the Alfa Romeo 6 2.5 Turbo use?

The Alfa Romeo 6 2.5 Turbo (1983–1987) uses a 12 V, 77 Ah battery.