Alfa Romeo1987–1993Technical specifications

75 3.0: Technical specifications

Workshop data for the 3-litre petrol (engine code 061.24). 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 (061.24) to the vehicle before ordering parts or applying these figures.

Vehicle specifications

Overview

Make: Alfa Romeo
Model: 75
Years: 1987–1993
Fuel: Petrol
Engine code: 061.24

Performance & efficiency

Power: 136 kW (185 hp)
Engine size: 2,959 cc
Cylinders: 6 · OHC
Compression ratio: 9.5:1
Fuel system: Bosch

Fluids & capacities

Engine oil (with the filter): 6.0 litres

All 117 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	6/OHC
Capacity (Fiscal) cc	2959 (2934)
Compression ratio :1	9,5
Suitable for unleaded petrol	Yes
Minimum octane rating RON	95
Ignition system Type	TSZ-i
Ignition system Description	Trans-i
Trigger location	Distributor
Fuel system Make	Bosch
Fuel system Type	L-Jetronic
Fuel system Description	MFI-i
Air metering Type	Flow
Combined ignition and fuel ECM	No
Diagnostic socket	No

Ignition system

Ignition coil Make	Bosch
Ignition coil Type	0 221 600 002
Ignition coil supply voltage + with ballast V	11,0
Primary resistance Ohm	0,7-1,2
Secondary resistance Ohm	6900-11900
Distributor (ECM) Make	Bosch
Distributor (ECM) No.	0 237 322 001

Firing order

The firing order for the Alfa Romeo 75 3.0 (1987–1993) is 1-4-2-5-3-6.

Firing order	1-4-2-5-3-6

Valve clearances

Valve clearances for the Alfa Romeo 75 3.0 (1987–1993) are 0,48-0,50 mm inlet and 0,23-0,25 mm exhaust, measured cold.

Valve clearance - INLET mm	0,48-0,50 cold
Valve clearance - EXHAUST mm	0,23-0,25 cold

Engine oil & fluids

Engine oil

The Alfa Romeo 75 3.0 (1987–1993) takes 6.0 litres of engine oil with the filter.

A listed engine oil option is SAE 10W-40 for moderate climates, with API/ACEA classification SG/A2.

A listed engine oil option is SAE 10W-50 as an alternative for moderate climates, with API/ACEA classification SG/A3.

Manual gearbox

The manual gearbox has a listed capacity of 2.1 litres. The specified oil is SAE 75W-90 semi-synthetic.

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	10W-40
Engine oil classification API/ACEA	SG/A2
Ambient temperature range	Moderate climate alternative
Engine oil grade SAE	10W-50
Engine oil classification API/ACEA	SG/A3
Engine with filter(s) litres	6.0
Other lubricants and capacities
Manual transmission oil grade SAE	75W-90 Semi-synthetic
Manual transmission litres	2.1
Cooling system - total capacity litres	10.0

Brakes & wear limits

Brake disc thickness

Brake discs on the Alfa Romeo 75 3.0 (1987–1993) are replaced at a minimum thickness of 9 mm (solid) or 20 mm (ventilated) front and 8 mm rear.

Minimum disc thickness for replacement - solid Front	9 mm
Minimum disc thickness for replacement - ventilated Front	20 mm
Minimum disc thickness for replacement Rear	8 mm

Brake disc and drum dimensions

Parking brake travel No. of notches	4-6

Service & electrical

Ignition timing

Basic ignition timing for the Alfa Romeo 75 3.0 (1987–1993) is 7°±1° BTDC at 850 rpm.

CO level
Ignition timing	Without vacuum
Ignition timing - basic BTDC °Engine/rpm	7±1/850

Battery

The Alfa Romeo 75 3.0 (1987–1993) uses a 12 V, 60 Ah battery (reserve capacity 110 minutes).

Battery V/RC(Ah)	12/110 (60)

Spark plugs

The Alfa Romeo 75 3.0 (1987–1993) uses Lodge HL-E spark plugs with a 0,7 mm electrode gap.

Spark plugs Original equipment	Lodge
Spark plug Type	HL-E
Electrode gap mm	0,7
Spark plugs Make	Autolite
Spark plug Type	APP63
Electrode gap mm	0,7
Spark plugs Make	Beru
Spark plug Type	14-7DU
Electrode gap mm	0,8
Spark plugs Make	Bosch
Spark plug Type	W7DC
Electrode gap mm	0,7
Spark plugs Make	Champion
Spark plug Type	RN7YCC
Electrode gap mm	0,8
Spark plugs Make	NGK
Spark plug Type	PFR6B
Electrode gap mm	0,7

Tuning and emissions

CO level
Tuning conditions	—
Ignition advance	Without vacuum and basic timing
Ignition advance checks °Engine/rpm	0-4/1200
Ignition advance checks °Engine/rpm	16-21/2600
Ignition advance checks °Engine/rpm	24-28/4200
Vacuum check	Ignition timing advances
Vacuum range °Engine	8-12
Vacuum starts mbar	170
Vacuum ends mbar	261
Idle speed rpm	850±50
Oil temperature °C	60
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. %	0,3
Lambda at increased idle λ	0,97-1,03

Starting and charging

Starter motor Make	Bosch
Starter motor Type	0 001 311 139
Minimum starting voltage V	10
Maximum cranking amps A	178-218
Alternator Make	Bosch
Alternator Type	0 120 488 103
Alternator output A/V/rpm	70/14/2000
Regulated voltage V	13,7-14,7

Service checks and adjustments

Oil pressure bar/rpm	3,9-5,9/5500
Radiator cap bar	0,59-0,78
Thermostat opens °C	81-85
Drive belt tension - alternator/PAS/AC mm	16/13

Fuel system

System pressure bar	2,8-3,2
Regulated pressure with vacuum bar	2,3-2,7
Engine coolant temperature (ECT) sensor Ohm/°C	250-400/80
Injector Ohm	2,0-3,0

Tightening torques

Cylinder head bolt torque

The cylinder head bolts on the Alfa Romeo 75 3.0 (1987–1993) are tightened in 3 stages: 40-60 Nm, then 89-98 Nm, then a final 100-106 Nm.

Cylinder head
Renew bolts	No
Tighten	40-60 Nm
Tighten	89-98 Nm
Run engine	600 miles/1000 km
Individually slacken off	360°
Tighten	100-106 Nm

Other engine tightening torques
Cylinder head instructions	—
Main bearings Renew bolts/nuts	No
Main bearings Stage 1	38-40 Nm
Main bearings Stage 2	76-81 Nm
Big end bearings Renew bolts/nuts	No
Big end bearings Stage 1	23-26 Nm
Big end bearings Stage 2	46-51 Nm
Flywheel/driveplate	113 Nm
Crankshaft pulley/damper centre bolt	235 Nm
Camshaft sprocket/gear	97-117 Nm
Camshaft carrier/cap	16-18 Nm
Spark plugs	25-34 Nm
Chassis tightening torques
Rear hub	265-324 Nm
Steering track rod end	45-55 Nm
Brake caliper/carrier to hub Front	80 Nm
Brake caliper/carrier to hub Rear	48 Nm
Road wheels	98 Nm

Air conditioning

Air conditioning refrigerant Type	R12
Air conditioning refrigerant quantity grams	900
Air conditioning oil Type	Suniso 5GS

Frequently asked questions

What is the firing order of the Alfa Romeo 75 3.0?

The firing order for the Alfa Romeo 75 3.0 (1987–1993) is 1-4-2-5-3-6.

What spark plugs does the Alfa Romeo 75 3.0 use?

The Alfa Romeo 75 3.0 (1987–1993) uses Lodge HL-E spark plugs with a 0,7 mm electrode gap.

How much oil does the Alfa Romeo 75 3.0 take?

The Alfa Romeo 75 3.0 (1987–1993) takes 6.0 litres of engine oil with the filter. A listed engine oil option is SAE 10W-40 for moderate climates, with API/ACEA classification SG/A2. A listed engine oil option is SAE 10W-50 as an alternative for moderate climates, with API/ACEA classification SG/A3.

What are the valve clearances for the Alfa Romeo 75 3.0?

Valve clearances for the Alfa Romeo 75 3.0 (1987–1993) are 0,48-0,50 mm inlet and 0,23-0,25 mm exhaust, measured cold.

What is the cylinder head torque for the Alfa Romeo 75 3.0?

The cylinder head bolts on the Alfa Romeo 75 3.0 (1987–1993) are tightened in 3 stages: 40-60 Nm, then 89-98 Nm, then a final 100-106 Nm.

What is the ignition timing for the Alfa Romeo 75 3.0?

Basic ignition timing for the Alfa Romeo 75 3.0 (1987–1993) is 7°±1° BTDC at 850 rpm.