Engine & fuel system
4 documented faults — symptoms, causes and workshop fixes.
Engine misfire
Water/oil ingress into spark plug orifice. Fix: clean and lubricate.
Overview
- Affects
- All models.
- Remedy
- Clean & lubricate
Symptoms
Engine malfunction indicator lamp (MIL) illuminated. Poor cold starting. Poor engine running.
Repair steps
- Clean ignition coil and spark plug orifice.
- Check spark plugs for insulator damage or arcing.
- Check cylinder head cover for leaks.
Data: Motorwise Workshop. Bulletin 1.
Idle speed surges
Throttle valve not closing correctly due to build up of deposits in throttle body. Fix: clean and lubricate.
Overview
- Affects
- All models.
- Remedy
- Clean & lubricate
Symptoms
Engine jerking. Poor throttle response.
Repair steps
- Remove throttle body intake pipe.
- Clean deposits from inner wall.
- Actuate throttle valve manually 3 to 5 times.
- Inspect throttle body for any remaining contamination.
- If necessary clean again.
- Fit throttle body intake pipe.
- Check idle speed.
Data: Motorwise Workshop. Bulletin 2.
Engine malfunction indicator lamp (MIL) illuminated
Symptoms
Trouble codes stored: P0325, P1325.
Cause
Knock sensor (KS) fault.
Repair
- Check wiring connector and resistance of KS. Replace parts as necessary.
Data: Motorwise Workshop. Bulletin 4.
Rattling noise from top of engine for several seconds when starting after the vehicle has stood for long periods
Overview
- Affects
- All models with 1.6/1.8/2.0 petrol engines.
- Remedy
- Fit modified part
- Parts
- 4 parts
Repair
- Engine No. →3575550. Remove cylinder head. Fit non-return valve to oil gallery of camshaft position (CMP) actuator. Refit cylinder head. Fit modified camshaft position (CMP) actuator. Fit new cylinder head cover gasket.
- Engine No. 3575550→. Fit modified camshaft position (CMP) actuator. Fit new cylinder head cover gasket.
Parts4 parts
| Part | Part number | Qty |
|---|---|---|
| Camshaft position (CMP) actuator | 71738360 | 1 |
| Non-return valve | 60677899 | 1 |
| Cylinder head cover gasket (JTS) | 60669492 | 1 |
| Cylinder head cover gasket (Twin spark) | 60655592 | 1 |
Data: Motorwise Workshop. Bulletin 5.
Electrical & ignition
2 documented faults — symptoms, causes and workshop fixes.
Automatic window partial opening function not working correctly
Cause
Electric window control module software fault.
Repair
- Replace electric window control module(s) as required.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Electric window control module | 50512717 | 2 |
Data: Motorwise Workshop. Bulletin 7.
Irregular operation of electric windows
Overview
- Affects
- All models, VIN 5260347-5262208.
- Parts
- 2 parts
Cause
Driver's electric window switch faulty.
Repair
- Inspect production date code on driver's electric window switch.
- If the date code is 297, renew driver's electric window switch.
Parts2 parts
| Part | Part number | Qty |
|---|---|---|
| Electric window switch, driver's door - LHD | 156071738 | 1 |
| Electric window switch, driver's door - RHD | 156071739 | 1 |
Data: Motorwise Workshop. Bulletin 8.
Brakes
1 documented fault — symptoms, causes and workshop fixes.
Whistling noise from front brakes when brakes applied
Cause
Unsatisfactory design of front brake pads.
Repair
- Fit modified front brake pads.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Front brake pad kit | 77362229 | 1 |
Data: Motorwise Workshop. Bulletin 10.
Suspension & drivetrain
2 documented faults — symptoms, causes and workshop fixes.
Knocking/squeaking noise from rear suspension over uneven surfaces
Rear suspension lower arm bushes worn. Fix: fit a new part.
Overview
- Affects
- All models.
- Remedy
- Fit new part
Repair steps
- Mark position of rear suspension lower arm inner bolt.
- Fit new rear suspension lower arms.
- Realign marks and check rear wheel alignment.
Data: Motorwise Workshop. Bulletin 3.
Noise from front suspension over uneven surfaces
Cause
Front suspension upper arm making contact with wheel arch lining.
Repair
- Modify front wheel arch lining by cutting off section where contact has occurred.
Data: Motorwise Workshop. Bulletin 6.
Other
1 documented fault — symptoms, causes and workshop fixes.
Metallic noise from fascia over uneven road
Symptoms
Rattling noise from audio unit area.
Cause
Excessive clearance between audio unit and surrounding.
Repair
- Apply felt tape to audio unit.
Data: Motorwise Workshop. Bulletin 9.
Glossary
Technical terms used in this guide.
- MIL
- Malfunction indicator lamp — the engine warning light on the dashboard
- VIN
- Vehicle identification number — 17 characters, found at the base of the windscreen and on the V5C logbook
- Trouble Codes
- Standardised fault codes stored by the engine control module, read with a diagnostic tool
- CMP
- Camshaft position — a sensor that tells the engine control module where the camshaft is
- KS
- Knock sensor — listens for engine knock so the engine control module can retard the timing
- Actuator
- A motor or solenoid that moves a mechanical part on command
- Control Module
- A control unit for one of the vehicle's systems (engine, gearbox, brakes, body, and so on)
- Oil Gallery
- An internal oil passage in the engine
- Bushes
- Rubber mountings that let a suspension or body joint move without metal-to-metal contact
- Lower Arm
- A suspension link that locates the wheel at the bottom of the hub
Frequently asked questions
What are the common faults with the Alfa Romeo GT 1.8?
This guide contains 10 workshop bulletins for the Alfa Romeo GT 1.8. Of these, four concern the engine and fuel system and two the electrical and ignition. Symptoms, causes, repair steps and part numbers are shown where supplied.
Does every Alfa Romeo GT 1.8 have these faults?
No. These are patterns documented across the model by workshops, not predictions for an individual vehicle. Where a fault applies only to certain vehicles or VIN ranges, that is listed with the fault.
Can I check for Alfa Romeo GT 1.8 faults myself?
Many of them. The documented symptoms can be seen, heard or felt during a test drive.