Cette culasse est conçue pour le early VW diesel engine family (pre-TDI), including the 1.6L and 1.9L injection indirecte (IDI) engines. These engines are SOHC, 8-valve, et 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. Spécifications techniques
Codes moteur
1Y, AAZ, ABL, AEF, 1X
Déplacement
1.6L (AEF) / 1.9L (1Y, AAZ, ABL, 1X)
Train de soupapes
SOHC, 8 valves (2 valves per cylinder)
Type de culasse
Indirect Injection (pre-TDI)
Type de carburant
Diesel
Aspiration
NA (1Y, 1X, AEF) / Turbocharged (AAZ, ABL)
Circuit de refroidissement
Refroidi par eau
Timing
Belt-driven camshaft
Matériau de la culasse
Alliage d'aluminium moulé
3. Applications compatibles avec les véhicules
Faire
Modèle
Années
Volkswagen
Golf Mk2 / Mk3, Jetta, Passat, Caddy
1989–1999
Siège
Ibiza, Cordoba, Toledo
1993–1999
Skoda
Felicia 1.9D
1995–2001
VW Transporter
T4 1.9D (AAZ/ABL)
1991–2003
4. Numéros de pièces OEM (sélection)
Numéro de pièce
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
Problème courant
Cause
Solution
Cracked pre-combustion chamber
Overheating or injector failure
Replace prechambers or head
Déformation de la tête
Panne du système de refroidissement
Refaire surface ou remplacer
Usure du guide de soupape
High mileage
Replace guides/seals
Dommages au filetage des bougies de préchauffage
Improper installation
Repair threads or replace head
6. Conseils d'installation
Utiliser new stretch bolts et Joint de culasse MLS
Vérifier pre-combustion chamber seating (especially on AAZ/1Y)
Assurer coolant system is properly flushed to prevent cracks
Utiliser correctement séquence de couple et alignement de synchronisation
On turbo models (AAZ/ABL), check oil feed and return lines
7. Export & Market Demand
Région
Key Factors
Europe de l'Est
Widespread use in older VW/Skoda – high rebuild demand
Afrique du Nord
Common in imported Golf/Caddy – affordable diesel head
Moyen-Orient
Utility vehicles in Iraq, Jordan, Lebanon
Amérique du Sud
Brazil, Argentina – used in rural/agricultural vehicles
Sub-Saharan Africa
High demand for durable, non-TDI diesel heads
8. Product Features
Précision CNC-machined valve seats and guides
Disponible en nu, semi-finished, ou entièrement assemblé
100% pressure and crack tested
Soutient IDI injection nozzles et chambres de précombustion
Compatible avec original turbo manifolds and EGR setups