From 2008 to 2013, the General Motors LDK 2.0-liter turbo engine was manufactured in the United States and fitted to charged Buick Regal modifications, including Hirsch Performance models. On Opel vehicles, this turbo engine was referred to by its own index, A20NHT.
GM Ecotec’s second generation comprises LDK, LHU, LNF, LAF, LEA, LE5, and LE9.
Specifications
| Production years | 2008-2013 |
| Displacement, cc | 1998 |
| Fuel system | direct injection |
| Power output, hp | 217 – 257 |
| Torque output, Nm | 350 – 400 |
| Cylinder block | aluminum R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 86 |
| Piston stroke, mm | 86 |
| Compression ratio | 9.2 |
| Features | DOHC |
| Hydraulic lifters | no |
| Timing drive | chain |
| Phase regulator | Dual CVCP |
| Turbocharging | BorgWarner K04 |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 6.0 |
| Fuel type | petrol |
| Euro standards | EURO 5 |
| Fuel consumption, L/100 km (for Buick Regal 2010) — city — highway — combined |
13.1 8.2 10.7 |
| Engine lifespan, km | ~220 000 |
| Weight, kg | 163 |
The engine was installed on:
- Buick Regal 5 (GMX350) in 2008 – 2013.
Disadvantages of the GM LDK engine
This line of turbo engines’ primary issue is their high knocking tendency.
As a result, it is crucial to keep an eye on both the fuel’s quality and the radiators’ cleanliness.
The timing chain’s relatively low resource is another well-known issue.
Additionally, you will need to replace the phase regulators if you ignore the crackling of the chains.
The engine’s less robust electronic throttle and injection pump are among its weaknesses.