The 2.5-liter Chevrolet X25D1 or LF4 engine was produced from 2000 to 2014 at a Korean plant and was installed on relatively large concern models such as Epica and Evanda. The XK-6 range of 6-cylinder units was developed jointly by Daewoo and Porsche.
One of the features of the engine is the presence of VIS. This is the Variable Intake System, in other words, the intake geometry change system. A method was used to change the length of the intake manifold.
The X series also includes engines: X20D1.
Specifications
| Production years | 2000-2014 |
| Displacement, cc | 2492 |
| Fuel system | distributed injection |
| Power output, hp | 155 |
| Torque output, Nm | 237 |
| Cylinder block | cast iron R6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 77 |
| Piston stroke, mm | 89.2 |
| Compression ratio | 9.8 |
| Features | VIS |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | no |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 6.5 |
| Fuel type | petrol |
| Euro standards | EURO 3/4 |
| Fuel consumption, L/100 km (for Chevrolet Epica 2010) — city — highway — combined |
13.8 6.6 9.3 |
| Engine lifespan, km | ~260 000 |
The engine was installed on:
- Chevrolet Evanda V200 in 2000 – 2006;
- Chevrolet Epica V250 in 2006 – 2014;
- Daewoo Magnus V200 in 2000 – 2006;
- Daewoo Tosca V250 in 2006 – 2013.
Disadvantages of the X25D1 engine
- The most famous engine failure is the cranking of the liners due to the wedge of the oil pump;
- The crumbs of the collapsing catalyst are drawn into the cylinders, where they scratch the walls;
- Another cause of oil burning is the wear of valve seals and the occurrence of rings;
- The cooling system delivers a lot of problems here: either the pipes flow, or the tank will burst;
- After over-tightening the drain plug, the crankcase of the power unit often cracks;
- Alusil coating of cylinder walls can begin to break down already at 100,000 km;
- The oil pressure sensor, generator and hydraulic lifters have a modest resource.
