AJA engine — VW 2.4 D (2.4L)
2.4L · 75 hp
Engine overview
Vehicles with this engine
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | AJA |
| Capacity | 2370 cc |
| Idle speed | 800 - 900 rpm |
| Normal | 34.0 bar |
| Minimum | 26.0 bar |
| Differential limit between cylinders | < 5.0 bar |
| Oil pressure | 2.0 / 2000 bar/rpm |
Engine (diesel)
| Injection pump (make and type) | Bosch |
| Number of cylinders | 5 |
| Injector firing order | 1 - 2 - 4 - 5 - 3 |
| Injection pump timing (dynamic) | 11.5 - 13.5 / 800 - 900 ° BTDC/rpm |
| Injection pump timing (static) | 0.9 ± 0.02 mm |
| Injector pressure | 130 - 138 bar |
| Minimum | 120 bar |
| Oil temperature during test | 80 °C |
| Exhaust gas analysis | < 2.01 m-1 |
| Min. no-load governed speed | 4700 rpm |
| Max. no-load governed speed | 4900 rpm |
| Idle speed, minimum | 800 rpm |
| Idle speed, maximum | 900 rpm |
| Test time | 0.5 s |
Cooling system
| Cap pressure | 1.3 - 1.5 bar |
| Thermostat opens at | 87 - 102 °C |
| Stage 1/Fan 1 | 84 - 89 °C |
| Stage 2/Fan 2 | 90 - 95 °C |
Electrical
| Battery | 72/92 (>1992) 74/80/88 (1992>) Ah |
| Alternator | 90/120 A |
Capacities
| Engine sump, incl. filter | 5.5 l |
| Manual transmission | 02B |
| Gearbox refill | 2.5 l |
| Automatic transmission | 01P |
| Gearbox refill | 3.0 - 3.5 l |
| Differential | 1.15 0.75 (01/1996>) l |
| Cooling system | 9.0 l |
| Air-conditioner refrigerant | 950 + 50 g |
| Air-conditioner refrigerant | 1000 + 50 g |
| Air-conditioner refrigerant | 1350 + 50 g |
| Air-conditioner refrigerant | 1400 + 50 (5/1993 >) 1350 + 50 (7/1997 >) g |
| Air-conditioner refrigerant | 700 +50 g |
| Air-conditioner compressor oil | 135 ml |
| Air-conditioner compressor oil | 240 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 ° |
| Flywheel | 60 Nm + 90° Nm |
| Big-end bearing cap | 65 Nm |
| Main bearing cap | 30 Nm + 90° Nm |
| Oil plug | 30 Nm |
| Injector nozzle | 70 Nm |
| Glow plugs | 15 Nm |
| Front hub | 200 Nm |
| Rear hub | 200 Nm |
| Wheel nuts | 160 Nm |
Emissions
| Emission code | 70/220*1996/44 |
| Emission standard | Euro 2 |
| CO2 average | 248 - 254 g/km |
| CO | 0.211 g/km |
| HC NOx | 1.052 g/km |
| Particles | 0.124 g/km |
| CO2 average | 265 g/km |
| CO | 0.054 g/km |
| HC NOx | 1.438 g/km |
| Particles | 0.114 g/km |
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.
- Checking turbocharger
- Removing and installing exhaust turbocharger
- Checking and adjusting injection pump timing
- Removing, installing and tensioning injection pump toothed belt (engine codes AAB, AJA)
- Servicing injection pump
- Removing and installing parts of cooling system
- Removing and installing parts of exhaust gas recirculation system
- Removing and installing ribbed belt tensioning device
- Renewing pump cover throttle lever bush, pump cover gasket and throttle lever shaft O-ring
- Replacing injection pump throttle lever return spring – VW AAB
- Removing and installing air cooling parts
Got a AJA problem? Ask for free.
Describe the symptoms — TorqFix replies with a diagnosis cited from verified workshop data.
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.