Engine & identification
Vehicle identification
| No. of cylinders Type | 4/DOHC |
|---|---|
| Capacity (Fiscal) cc | 1712 (1700) |
| Compression ratio :1 | 10,0 |
| Suitable for unleaded petrol | Yes |
| Minimum octane rating RON | 95 |
| Ignition system Make | Bosch |
| Ignition system Type | Motronic ML4.1 |
| Ignition system Description | Map-i |
| Trigger location | Crankshaft |
| Fuel system Make | Bosch |
| Fuel system Type | Motronic ML4.1 |
| Fuel system Description | MFI-i |
| Air metering Type | Flow |
| Combined ignition and fuel ECM | Yes |
| Diagnostic socket | Yes |
Ignition system
| Ignition coil Make | Bosch |
|---|---|
| Ignition coil Type | 0 221 122 427 |
| Ignition coil supply voltage + with ballast V | 12,0 |
| Distributor (ECM) Make | Bosch |
| Distributor (ECM) No. | 0 237 523 012 |
Firing order
The firing order for the Alfa Romeo 33 Sport Wagon 1.7 4x4 (1990–1994) is 1-3-2-4.
| Firing order | 1-3-2-4 |
|---|
Valve clearances
Valve clearances on the Alfa Romeo 33 Sport Wagon 1.7 4x4 (1990–1994) 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 33 Sport Wagon 1.7 4x4 (1990–1994) takes 4.0 litres of engine oil with the filter.
A listed engine oil option is SAE 10W-30 for cold climates, with API/ACEA classification SH/A2.
A listed engine oil option is SAE 10W-40 for moderate climates, with API/ACEA classification SH/A2.
A listed engine oil option is SAE 10W-40 as an alternative for moderate climates, with API/ACEA classification SH/A3.
A listed engine oil option is SAE 20W-50 for hot climates, with API/ACEA classification SH/A2.
Manual gearbox
The manual gearbox has a listed capacity of 2.6 litres. The specified oil is SAE 75W-90 semi-synthetic.
Coolant
The listed total cooling-system capacity is 7.8 litres.
Grades, filling conditions and capacities
| Engine oil options | |
|---|---|
| Ambient temperature range | Cold climate |
| Engine oil grade SAE | 10W-30 |
| Engine oil classification API/ACEA | SH/A2 |
| Ambient temperature range | Moderate climate |
| Engine oil grade SAE | 10W-40 |
| Engine oil classification API/ACEA | SH/A2 |
| Ambient temperature range | Moderate climate alternative |
| Engine oil grade SAE | 10W-40 |
| Engine oil classification API/ACEA | SH/A3 |
| Ambient temperature range | Hot climate |
| Engine oil grade SAE | 20W-50 |
| Engine oil classification API/ACEA | SH/A2 |
| Engine with filter(s) litres | 4.0 |
| Other lubricants and capacities | |
| Manual transmission oil grade SAE | 75W-90 Semi-synthetic |
| Manual transmission litres | 2.6 |
| Differential oil grade - rear SAE | 80W-90 |
| Differential rear litres | 1.0 |
| Cooling system - total capacity litres | 7.8 |
| Brake fluid Type | ATE S |
Brakes & wear limits
Brake disc thickness
Brake discs on the Alfa Romeo 33 Sport Wagon 1.7 4x4 (1990–1994) are replaced at a minimum thickness of 9 mm (solid) or 20,2 mm (ventilated) front and 9,2 mm rear.
| Minimum disc thickness for replacement - solid Front | 9 mm |
|---|---|
| Minimum disc thickness for replacement - ventilated Front | 20,2 mm |
| Minimum disc thickness for replacement Rear | 9,2 mm |
| Maximum drum diameter for replacement Rear | 229,6 mm |
Brake disc and drum dimensions
| Disc runout Front | 0,03 mm |
|---|---|
| Maximum rear drum diameter | |
| Minimum pad thickness Front | 7 mm |
| Minimum pad/shoe thickness | |
| Parking brake travel No. of notches | 1-3 |
Service & electrical
Battery
The Alfa Romeo 33 Sport Wagon 1.7 4x4 (1990–1994) uses a 12 V, 35 Ah battery (reserve capacity 55 minutes).
| Battery V/RC(Ah) | 12/55 (35) |
|---|
Spark plugs
The Alfa Romeo 33 Sport Wagon 1.7 4x4 (1990–1994) uses Lodge 25HL spark plugs with a 0,7 mm electrode gap.
| Spark plugs Original equipment | Lodge |
|---|---|
| Spark plug Type | 25HL |
| Electrode gap mm | 0,7 |
| Spark plugs Make | Autolite |
| Spark plug Type | APP3923 |
| Electrode gap mm | 0,7 |
| Spark plugs Make | Beru |
| Spark plug Type | UXF79 |
| Spark plugs Make | Bosch |
| Spark plug Type | F7DTC |
| Electrode gap mm | 0,8 |
| Spark plugs Make | Champion |
| Spark plug Type | C6BMC |
| Spark plugs Make | NGK |
| Spark plug Type | PFR6B |
| Electrode gap mm | 0,7 |
Tuning and emissions
| Ignition timing | Without vacuum |
|---|---|
| Ignition timing - basic BTDC °Engine/rpm | 8±1/900 Not adjustable |
| Ignition advance | With vacuum and basic timing |
| Ignition advance checks °Engine/rpm | 34/4500 |
| Idle speed rpm | 900-1050 Not adjustable |
| Oil temperature °C | 60 |
| CO level at idle speed - tailpipe Vol. % CO | 0,2 Max Not adjustable |
| HC level at idle speed ppm | 70 Max |
| 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 | 0 001 208 233 |
| Minimum starting voltage V | 8 |
| Maximum cranking amps A | 95-116 |
| Alternator Make | Bosch |
| Alternator Type | 0 120 488 118 |
| Alternator output A/V/rpm | 45/14/2000 |
| Regulated voltage V | 13,7-14,5 |
Service checks and adjustments
| Radiator cap bar | 0,69 |
|---|---|
| Thermostat opens °C | 84-88 |
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 | 330/80 |
| Crankshaft position (CKP) sensor/engine speed (RPM) sensor Ohm | 500-1600 |
| Injector Ohm | 14,0-16,0 |
| Idle air control (IAC) valve/idle speed control (ISC) actuator Ohm | 8-150 |
| Lambda sensor (Oxygen) heater Ohm | 14,0-16,0 |
Tightening torques
Cylinder head bolt torque
The cylinder head bolts on the Alfa Romeo 33 Sport Wagon 1.7 4x4 (1990–1994) are tightened in 3 stages: 31-35 Nm, then 61-65 Nm, then a final 91-95 Nm.
| Cylinder head | |
|---|---|
| Renew bolts | No |
| Tighten | 31-35 Nm |
| Tighten | 61-65 Nm |
| Tighten | 91-95 Nm |
| Cylinder head instructions | — |
|---|---|
| Other engine tightening torques | |
| Main bearings Renew bolts/nuts | No |
| Main bearings Stage 1 | — |
| View more information | — |
| Main bearings | |
| Big end bearings Renew bolts/nuts | No |
| Big end bearings Stage 1 | 22-24 Nm |
| Big end bearings Stage 2 | 43-48 Nm |
| Sump bolts | 8-10 Nm |
| Flywheel/driveplate | 94-105 Nm |
| Clutch pressure plate | 12-23 Nm |
| Crankshaft pulley/damper centre bolt | 118-144 Nm |
| Camshaft sprocket/gear | 63-70 Nm |
| Inlet manifold to cylinder head | 19-24 Nm |
| Spark plugs | 24-34 Nm |
| Chassis tightening torques | |
| Front hub | 427-472 Nm |
| Rear hub | — |
| Rear hub | |
| Steering track rod end | 39-48 Nm |
| Brake caliper/carrier to hub Front | 66 Nm |
| Brake caliper to carrier Rear | 33 Nm |
| Brake caliper/carrier to hub Rear | 47 Nm |
| Back plate to hub Rear | 39-48 Nm |
| Road wheels | 88-108 Nm |
Air conditioning
| Air conditioning refrigerant Type | R12 |
|---|---|
| Air conditioning refrigerant quantity grams | 1150 |
| Air conditioning oil Type | Suniso 5GS |
Frequently asked questions
What is the firing order of the Alfa Romeo 33 Sport Wagon 1.7 4x4?
The firing order for the Alfa Romeo 33 Sport Wagon 1.7 4x4 (1990–1994) is 1-3-2-4.
What spark plugs does the Alfa Romeo 33 Sport Wagon 1.7 4x4 use?
The Alfa Romeo 33 Sport Wagon 1.7 4x4 (1990–1994) uses Lodge 25HL spark plugs with a 0,7 mm electrode gap.
How much oil does the Alfa Romeo 33 Sport Wagon 1.7 4x4 take?
The Alfa Romeo 33 Sport Wagon 1.7 4x4 (1990–1994) takes 4.0 litres of engine oil with the filter. A listed engine oil option is SAE 10W-30 for cold climates, with API/ACEA classification SH/A2. A listed engine oil option is SAE 10W-40 for moderate climates, with API/ACEA classification SH/A2. A listed engine oil option is SAE 10W-40 as an alternative for moderate climates, with API/ACEA classification SH/A3. A listed engine oil option is SAE 20W-50 for hot climates, with API/ACEA classification SH/A2.
What are the valve clearances for the Alfa Romeo 33 Sport Wagon 1.7 4x4?
Valve clearances on the Alfa Romeo 33 Sport Wagon 1.7 4x4 (1990–1994) are hydraulic — they self-adjust, so no manual clearance figure applies.
What is the cylinder head torque for the Alfa Romeo 33 Sport Wagon 1.7 4x4?
The cylinder head bolts on the Alfa Romeo 33 Sport Wagon 1.7 4x4 (1990–1994) are tightened in 3 stages: 31-35 Nm, then 61-65 Nm, then a final 91-95 Nm.
What is the minimum brake disc thickness for the Alfa Romeo 33 Sport Wagon 1.7 4x4?
Brake discs on the Alfa Romeo 33 Sport Wagon 1.7 4x4 (1990–1994) are replaced at a minimum thickness of 9 mm (solid) or 20,2 mm (ventilated) front and 9,2 mm rear.