The 2.0-liter General Motors LNF turbo engine was produced by the concern from 2006 to 2010 and was installed on charged versions of such models as the Pontiac Solstice, Saturn Sky and Chevrolet HHR. On Opel GT or Daewoo G2X cars, this power unit is known as Z20NHH.
Ecotec family:
1st gen – LSJ, L61;
2nd gen – LDK, LHU, LNF, LAF, LEA, LE5, LE9;
3rd gen – LSY, LTG, LCV, LKW.
Specifications
| Production years | 2006-2010 |
| Displacement, cc | 1998 |
| Fuel system | direct injection |
| Power output, hp | 260 |
| Torque output, Nm | 353 |
| 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 4 |
| Fuel consumption, L/100 km (for Pontiac Solstice GXP 2008) — city — highway — combined |
12.4 8.4 10.7 |
| Engine lifespan, km | ~200 000 |
| Weight, kg | 163 |
The engine was installed on:
- Chevrolet Cobalt 1 (GMX001) in 2007 – 2010;
- Chevrolet HHR 1 (GMT001) in 2007 – 2010;
- Pontiac Solstice 1 (GMX020) in 2006 – 2009;
- Saturn Sky 1 (GMX023) in 2006 – 2009;
- (as Z20NHH) Daewoo G2X 1 (M07) in 2007 – 2009;
- (as Z20NHH) Opel GT B (M07) in 2007 – 2009.
Disadvantages of the GM LNF engine
- The main problem of this series of turbine units is their high tendency to detonation.
- That is why it is important to monitor both the cleanliness of the radiators and the quality of the fuel.
- In second place in terms of the number of complaints is the rather low resource of the timing chain.
- If you ignore the crackle of the chains for a long time, then you will have to change expensive phase regulators.
- Weaknesses here also include a short-lived electronic throttle and high-pressure fuel pump.
Frequently asked questions about the GM LNF
How much power does the GM LNF make?
The GM LNF develops 260 hp and 353 Nm of torque.
How much oil does the GM LNF take and which one?
Engine oil capacity: 6.0 liters. Recommended oil: 5W-30.
Does the GM LNF have a timing belt or chain?
The GM LNF uses a timing chain.
Is the GM LNF turbocharged?
Yes, the GM LNF is turbocharged (BorgWarner K04).
Does the GM LNF 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 LNF last?
The typical lifespan of the GM LNF is ~200 000 km with proper maintenance.
What is the fuel consumption of the GM LNF?
Pontiac Solstice GXP 2008: city 12.4, highway 8.4, combined 10.7 L/100 km.
What cars was the GM LNF installed on?
Chevrolet Cobalt 1 (GMX001) in 2007 - 2010; Chevrolet HHR 1 (GMT001) in 2007 - 2010; Pontiac Solstice 1 (GMX020) in 2006 - 2009; Saturn Sky 1 (GMX023) in 2006 - 2009; (as Z20NHH) Daewoo G2X 1 (M07) in 2007 - 2009; (as Z20NHH) Opel GT B (M07) in 2007 - 2009.
What are the common problems of the GM LNF?
The main problem of this series of turbine units is their high tendency to detonation. That is why it is important to monitor both the cleanliness of the radiators and the quality of the fuel. All known problems.
