Applicable Engine:
1Y / AAZ / ABL / AEF / 1X
Applicable Brand:
AUDI / SEAT / VOLKSWAGEN / SKODA
Applicable Car:
GOLF / PASSAT / TRANSPORTER / CADDY
Product parameters:
| Displacement | Fuel | Cylinder | Vale | Camshaft | Year |
| 1.9 | Diesel | 4 | 8 | 1 | 1991 - 2003 |
Cylinder Head
Cylinder Head for VW 1Y AAZ ABL AEF 1X Diesel Engines
Introduction
Product NO.
| ML NO. | OEM NO. | REF NO. |
| MLG095A | 028103351M | 908055 |
| MLG095B | 028103351D 1110171010 | 908032 |
| MLG095C | 028103351J | 908708 |
| MLG095D | 028103351B | 908052 |
| MLG095E | 028103351L 028103351N | 908058 |
| MLG095F | 028103351E | 908059 |
| MLG095G | 028103351A | 908039 |
Product Information Cylinder Head
1.6L – 1.9L | SOHC | 8-Valve | Indirect Injection | Non-TDI
1. Product Overview
This cylinder head is designed for the early VW diesel engine family (pre-TDI), including the 1.6L and 1.9L indirect injection (IDI) engines. These engines are SOHC, 8-valve, and naturally aspirated or turbocharged, but not direct injection. Known for their simplicity and reliability, they were widely used in Volkswagen Group vehicles throughout the 1980s–2000s in Europe and global export markets.
2. Technical Specifications
| Engine Codes | 1Y, AAZ, ABL, AEF, 1X |
|---|---|
| Displacement | 1.6L (AEF) / 1.9L (1Y, AAZ, ABL, 1X) |
| Valvetrain | SOHC, 8 valves (2 valves per cylinder) |
| Cylinder Head Type | Indirect Injection (pre-TDI) |
| Fuel Type | Diesel |
| Aspiration | NA (1Y, 1X, AEF) / Turbocharged (AAZ, ABL) |
| Cooling System | Water-cooled |
| Timing | Belt-driven camshaft |
| Cylinder Head Material | Cast Aluminum Alloy |
3. Compatible Vehicle Applications
| Make | Model | Years |
|---|---|---|
| Volkswagen | Golf Mk2 / Mk3, Jetta, Passat, Caddy | 1989–1999 |
| Seat | Ibiza, Cordoba, Toledo | 1993–1999 |
| Skoda | Felicia 1.9D | 1995–2001 |
| VW Transporter | T4 1.9D (AAZ/ABL) | 1991–2003 |
4. OEM Part Numbers (Selection)
| Part Number | Description |
|---|---|
| 028103373A | Cylinder head (1Y, AAZ, 1X) |
| 028103351E | Assembled head with valves |
| 028103373F / D | Updated casting versions |
| 030103351A | For AEF 1.6D |
OEM numbers vary depending on turbo/non-turbo and EGR configuration.
5. Common Issues & Maintenance Notes
| Common Problem | Cause | Solution |
|---|---|---|
| Cracked pre-combustion chamber | Overheating or injector failure | Replace prechambers or head |
| Head warping | Cooling system failure | Resurface or replace |
| Valve guide wear | High mileage | Replace guides/seals |
| Glow plug thread damage | Improper installation | Repair threads or replace head |
6. Installation Tips
- Use new stretch bolts and MLS head gasket
- Verify pre-combustion chamber seating (especially on AAZ/1Y)
- Ensure coolant system is properly flushed to prevent cracks
- Use correct torque sequence and timing alignment
- On turbo models (AAZ/ABL), check oil feed and return lines
7. Export & Market Demand
| Region | Key Factors |
|---|---|
| Eastern Europe | Widespread use in older VW/Skoda – high rebuild demand |
| North Africa | Common in imported Golf/Caddy – affordable diesel head |
| Middle East | Utility vehicles in Iraq, Jordan, Lebanon |
| South America | Brazil, Argentina – used in rural/agricultural vehicles |
| Sub-Saharan Africa | High demand for durable, non-TDI diesel heads |
8. Product Features
- Precision CNC-machined valve seats and guides
- Available as bare, semi-finished, or fully assembled
- 100% pressure and crack tested
- Supports IDI injection nozzles and pre-combustion chambers
- Compatible with original turbo manifolds and EGR setups