AAZ engine — Seat 1.9 TD (1.9L)
1.9L · 75 hp
Engine overview
Vehicles with this engine
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | AAZ |
| Capacity | 1896 cc |
| Idle speed | 850 - 950 rpm |
| Normal | 34 bar |
| Minimum | 26 bar |
| Differential limit between cylinders | < 5.0 bar |
| Oil pressure | 2.0 / 2000 bar/rpm |
| Idle speed | 870 - 930 rpm |
| Differential limit between cylinders | < 5 bar |
Engine (diesel)
| Injection pump (make and type) | Bosch VE4/9F |
| Number of cylinders | 4 |
| Injector firing order | 1 - 3 - 4 - 2 |
| Injection pump timing (static) | 0.90 ± 0.02 mm |
| Injector pressure | 150 - 158 bar |
| Minimum | 140 bar |
| Exhaust gas analysis (opacity) | 58 % |
| Exhaust gas analysis | 2.00 m-1 |
| Min. no-load governed speed | 4950 rpm |
| Max. no-load governed speed | 5150 rpm |
| Exhaust gas analysis test method (Germany only) | A |
| Oil temperature during test | 80 °C |
| Idle speed, minimum | 890 rpm |
| Idle speed, maximum | 950 rpm |
| Test time | 0.5 s |
| Injection pump (make and type) | Bosch VE4 |
| Injection pump timing (static) | 0.80 ± 0.02 (->10/1994) mm |
| Injection pump timing (dynamic) | 10.5 ± 0.20 (->10/1994) ° BTDC/rpm |
| Exhaust gas analysis | < 2.01 m-1 |
| Max. no-load governed speed | 5100 - 5300 (-> 10/1994) 4950 - 5150 (10/1994 ->) rpm |
| Exhaust gas analysis test method/probe (Germany only) | A / 1 |
| Turbocharger (make and type) | KKK / Garett |
| Turbo pressure | 0.6 - 0.83 bar |
| Idle speed, minimum | 870 rpm |
| Idle speed, maximum | 930 rpm |
Cooling system
| Cap pressure | 1.4 - 1.6 bar |
| Thermostat opens at | 85 - 105 °C |
| Stage 1/Fan 1 | 92 - 97 °C |
| Stage 2/Fan 2 | 99 - 105 °C |
Electrical
| Battery | 64 Ah |
| Alternator | 65 A |
| Battery | 61 / 72 Ah |
| Alternator | 70 / 90 / 120 A |
Capacities
| Engine sump, incl. filter | 4.3 l |
| Manual transmission | 020 |
| Gearbox refill | 2.0 l |
| Cooling system | 6.5 l |
| Air-conditioner refrigerant | R134a: 730 - 790 (->1993) g |
| Air-conditioner refrigerant | 820 - 880 g |
| Air-conditioner refrigerant | 870 - 930 g |
| Air-conditioner compressor oil | 130 - 150 (-> 1993) 115 - 130 (1993 ->) ml |
Torque settings
| Cylinder head bolts — Stage 1 | 40 Nm |
| Cylinder head bolts — Stage 2 | 60 Nm |
| Cylinder head bolts — Stage 3 | 90 ° |
| Cylinder head bolts — Stage 4 | 90 ° |
| Main bearing cap | 65 Nm + 90° Nm |
| Big-end bearing cap | 30 Nm + 90° Nm |
| Flywheel | 60 Nm + 90° Nm |
| Front hub | 260 Nm |
| Wheel nuts | 110 Nm |
| Injector nozzle | 70 Nm |
| Glow plugs | 25 Nm |
| Oil plug | 30 Nm |
Engine codes in the same family
The same code prefix usually means the same block with a different output, fuel or model year. Procedures are often shared — check the code on the engine plate.
Workshop procedures for this engine
Step-by-step procedures from the workshop database.
- Dismantling and assembling engine
- Checking turbocharger
- Servicing valve gear
- Removing and installing parts of the lubrication system
- Removing and installing fuel tank with attachments
- Dismantling and assembling pistons and conrods
- Removing and installing fuel tank with its attachments
- Removing and installing parts of exhaust system
- Checking and adjusting injection pump timing
- Servicing injection pump
- Removing and installing fuel gauge sender -G
- Removing and installing crankshaft
- Removing and installing throttle lever or return spring
- Removing and installing fuel delivery unit, four wheel drive
- Removing and installing parts of exhaust gas recirculation system
- Removing and installing sealing flanges and flywheel/drive plate
- Adjusting idling speed, idling speed boost and engine governed speed
- Renewing pump cover throttle lever bush, pump cover gasket and throttle lever shaft O-ring
- Installing and adjusting accelerator position sender -G79 - Vehicles with TDI engine
- Seat 1.9 TD timing belt replacement
- Seat 1.9 TDI timing belt replacement
- VW Golf3, Vento, Passat3 1.9D, TD 1Y timing belt replacement
- VW 1.9 TD 1Y/AAZ timing belt replacement
- VW 1Y, AEY, AFN, 1Z, AHU timing belt replacement
- Cordoba 1993 / 1999, 1.6 AFT
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Get free diagnosis →Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
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The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.