The General Motors LHU 2.0-liter turbo engine was produced in the USA from 2010 to 2017 and was installed on charged versions of such popular models as the Buick Verano or Regal. This power unit on Opel cars is known under its own index A20NHT.
Ecotec family:
1st gen – LSJ, L61;
2nd gen – LDK, LHU, LNF, LAF, LEA, LE5, LE9;
3rd gen – LSY, LTG, LCV, LKW.
Specifications
| Production years | 2010-2017 |
| Displacement, cc | 1998 |
| Fuel system | direct injection |
| Power output, hp | 220 – 275 |
| Torque output, Nm | 350 – 410 |
| 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 Verano 2014) — city — highway — combined |
12.9 7.9 10.5 |
| Engine lifespan, km | ~220 000 |
| Weight, kg | 163 |
The engine was installed on:
- Buick Regal 5 (GMX350) in 2010 – 2017;
- Buick Verano 1 (D1SB) in 2012 – 2016.
Disadvantages of the GM LHU engine
- The main problem with this turbo engine is a high tendency to knock.
- Therefore, it is important to monitor the quality of the fuel used and the cleanliness of the radiators.
- The second most popular problem is the rather modest resource of the timing chain.
- And if you miss the replacement of chains, you will have to buy expensive phase regulators.
- The weaknesses of the engine also include a short-lived throttle assembly and injection pump.
Frequently asked questions about the GM LHU
How much power does the GM LHU make?
The GM LHU develops 220 - 275 hp and 350 - 410 Nm of torque.
How much oil does the GM LHU take and which one?
Engine oil capacity: 6.0 liters. Recommended oil: 5W-30.
Does the GM LHU have a timing belt or chain?
The GM LHU uses a timing chain.
Is the GM LHU turbocharged?
Yes, the GM LHU is turbocharged (BorgWarner K04).
Does the GM LHU need valve clearance adjustment?
Yes, there are no hydraulic lifters, so the valve clearances have to be checked and adjusted periodically.
How long does the GM LHU last?
The typical lifespan of the GM LHU is ~220 000 km with proper maintenance.
What is the fuel consumption of the GM LHU?
Buick Verano 2014: city 12.9, highway 7.9, combined 10.5 L/100 km.
What cars was the GM LHU installed on?
Buick Regal 5 (GMX350) in 2010 - 2017; Buick Verano 1 (D1SB) in 2012 - 2016.
What are the common problems of the GM LHU?
The main problem with this turbo engine is a high tendency to knock. Therefore, it is important to monitor the quality of the fuel used and the cleanliness of the radiators. All known problems.
