The 2.5-liter Volkswagen AJT 2.5 TDI diesel engine was produced from 1998 to 2003 and was installed in the very popular Transporter family of minibuses in the back of the T4. This 5-cylinder diesel engine was the weakest in its series of engines and did not have an intercooler.
The EA153 series also includes: AAB, AJT, ACV, AXG, BAC, BPE, AXD, AXE, AJS, AYH.
Specifications
| Production years | 1998-2003 |
| Displacement, cc | 2460 |
| Fuel system | direct injection |
| Power output, hp | 88 |
| Torque output, Nm | 195 |
| Cylinder block | cast iron R5 |
| Block head | aluminum 10v |
| Cylinder bore, mm | 81 |
| Piston stroke, mm | 95.5 |
| Compression ratio | 19.5 |
| Features | SOHC |
| Hydraulic lifters | yes |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | yes |
| Recommended engine oil | 5W-40 |
| Engine oil capacity, liter | 5.5 |
| Fuel type | diesel |
| Euro standards | EURO 2/3 |
| Fuel consumption, L/100 km (for VW Transporter 1995) — city — highway — combined |
9.9 6.5 7.7 |
| Engine lifespan, km | ~450 000 |
The engine was installed on:
- Volkswagen Transporter T4 (7D) in 1998 – 2003.
Disadvantages of the VW AJT engine
- The main problems of this diesel engine are associated with high pressure fuel pumps or injectors;
- Aluminum cylinder head is afraid of overheating, monitor the integrity of the cooling system;
- Every 100,000 km, an expensive replacement of the timing belt and injection pump belt, as well as their rollers, is required;
- On long runs, the vacuum pump often knocks, and the turbine starts to drive oil;
- Even in old engines there are a lot of electrical problems, especially the mass air flow sensor is often buggy.
