L2B LZW7156EJY Engine

Key points in short (TL;DR)

• Reliability: A very reliable old-school engine. Simple naturally aspirated design means fewer expensive failures.
• Timing system: Uses a timing chain, which reduces regular maintenance costs, but requires listening for noise on cold start.
• Dual-mass flywheel: It doesn’t have one. The clutch uses a solid flywheel and is cheap to replace (on manual gearboxes).
• Performance: The engine is “lazy” by modern standards. It lacks torque for confident overtaking on open roads.
• Gearbox: The CVT is the “Achilles’ heel” if the oil is not changed regularly. The manual gearbox is a safer choice on the used market.
• LPG (Autogas): An ideal candidate for LPG installation thanks to its indirect (MPI) injection.
• Verdict: Excellent for city and relaxed driving, cheap to maintain, but frustrating for more aggressive drivers.

Contents

• Introduction and Applications
• Technical Specifications
• Reliability and Maintenance
• Specific Parts and Costs
• Fuel Consumption and Performance
• Additional Options (LPG and Remapping)
• Gearbox (CVT and Manual)
• Used Car Buying Tips and Conclusion

Introduction and Applications

The engine designated as L2B (often under GM/SAIC nomenclature) is a classic example of a “global workhorse”. It is a power unit developed in cooperation between General Motors and their Chinese partners (SAIC-GM-Wuling). It is primarily installed in models intended for developing markets such as South America, the Middle East and parts of Asia.

Specifically, this 1.5‑liter petrol engine is the heart of the Chevrolet Groove (which is actually a rebadged Baojun 510). Its philosophy is simple: provide cheap transportation with minimal maintenance costs. For us in Europe, this engine is interesting as an alternative to complicated turbo-petrol units, especially if you are looking for a vehicle that will serve for years with minimal investment in “exotic” failures.

Technical Specifications

Reliability and Maintenance

Timing system: Chain or belt?

The L2B engine uses a timing chain (silent chain) to drive the camshafts. This is great news for owners because there is no fixed replacement interval like with a timing belt. In practice, this chain is designed to last as long as the engine, but realistically you should expect an inspection or replacement after 150,000–200,000 km. If you hear metallic rattling on cold start that disappears after a few seconds, it’s a sign that the chain has stretched or that the hydraulic tensioner is getting weak.

Most common issues

Although robust, the L2B has its “quirks”:

• Valve cover gasket: Oil leaks from the valve cover are common. This is not an expensive repair, but it can make the engine dirty and cause a burning-oil smell.
• Ignition coils and spark plugs: Sensitive to poor fuel quality or neglected spark plugs. Failure of one coil (they can be in a pack or individual, depending on sub-version) causes rough running and a “Check Engine” light.
• Sensors (camshaft/crankshaft): Occasional problems with position sensors can occur, which may lead to hard starting.

Service intervals and Oil

It is recommended to do an oil service every 10,000 km to a maximum of 15,000 km or once a year. Ignore extended 30k km intervals if you want the engine to last.

The engine takes approximately 3.5 to 4 liters of oil (always check precisely with the dipstick). A 5W‑30 grade is recommended (preferably with Dexos 1 Gen 2 or Dexos 2 specification, given its GM roots). This oil is crucial for proper operation of the DVVT system (variable valve timing).

Oil consumption: Generally it does not consume oil to a worrying degree. Consumption up to 0.5 L per 10,000 km is acceptable. If it uses more, it is usually due to worn valve stem seals (at high mileage) or leaks at gaskets.

Specific Parts and Costs

Dual-mass flywheel and Clutch

Good news: This engine, when paired with a manual gearbox, uses a conventional solid flywheel. There is no expensive dual-mass flywheel that costs “a fortune”. The clutch kit is relatively cheap and falls into the “affordable” category.

Injection system and Turbo

The engine is naturally aspirated (no turbocharger). This means you will never face the cost of turbo overhauls, intercooler issues, or oil leaks from the turbo. The injection system is MPI with electromagnetic injectors that are very durable and tolerant of poorer fuel quality. Injector repair or replacement is rare and inexpensive.

EGR and Emissions

The Chevrolet Groove model usually meets Euro 5 or Euro 6 standards (depending on the market). It has an EGR valve that can get clogged from city driving (symptoms: hesitation, poor throttle response). Cleaning is possible and not expensive. There is no DPF because it’s a petrol engine, and it generally does not have a GPF (gasoline particulate filter), except on strictly EU-spec latest-generation models (which is rare for the Groove).

Fuel Consumption and Performance

City driving

In real-world city traffic, the Chevrolet Groove with this engine and a CVT gearbox uses between 8.5 and 10 liters per 100 km. The manual gearbox can reduce this figure by about 1 liter if you drive efficiently. Don’t trust the factory figures of 6 liters – those are lab conditions.

Is the engine “lazy”?

Let’s be honest: Yes, it is. With 112 HP and only 147 Nm of torque in an SUV body, you cannot expect sporty performance. In the city it’s perfectly adequate and feels lively up to 50–60 km/h. However, any stronger acceleration requires “wringing” the engine into high revs, which results in noise rather than dramatic acceleration.

Highway

On the highway, at 130 km/h, the engine revs high, often around 3500–4000 rpm (depending on the gearbox). This creates cabin noise and raises fuel consumption to about 7.5–8.5 liters. Overtaking on main roads requires planning and shifting down.

Additional Options and Modifications

LPG installation

This is an ideal engine for LPG. Thanks to the MPI system (port injection into the intake manifold), installation is simple, cheap (standard sequential systems) and the engine handles LPG very well. There is no need for expensive “Direct Injection” kits. This is the best way to drastically cut running costs.

Remapping (Stage 1)

Not recommended / Not worth it. On naturally aspirated petrol engines, remapping (chipping) gives you a negligible 3–5 HP and maybe 5–8 Nm. You won’t feel that in real driving. It’s better to invest that money in quality tires or regular servicing.

Gearbox: Manual vs. CVT

Manual gearbox (6-speed)

The standard 6‑speed manual gearbox is robust and precise. Maintenance comes down to changing the gearbox oil every 60,000–80,000 km (about 2 liters of gear oil, e.g. 75W‑90, check the exact spec). Failures are rare and mostly related to wear items (clutch kit).

CVT automatic gearbox

This is where you need to be careful. The CVT (continuously variable transmission) provides smooth driving in the city, but it has specific drawbacks:

• Maintenance: Changing the oil in the CVT is MANDATORY every 40,000 to 50,000 km. Many drivers ignore this because it is “sealed for life” (allegedly filled for life), which is simply not true. Neglect leads to the internal chain slipping.
• Failure symptoms: If you feel jerking when setting off, whining that follows engine speed, or if the gearbox “hesitates” when you press the throttle, these are expensive warning signs.
• Costs: Repairing a CVT is often not cost-effective (very expensive), so it is usually replaced as a complete used or new unit.

Buying Used and Conclusion

Before buying a Chevrolet Groove with this engine, make sure you do the following:

1. Cold start: Insist that the engine is completely cold. Listen for the first 3–5 seconds – if you hear chain rattling, prepare for the cost of a major timing service.
2. CVT test drive: Warm up the car and try hard accelerations. The gearbox must not jerk or produce a “grinding” noise.
3. Visual inspection: Remove the plastic engine cover and check for oil traces around the valve cover.

Final verdict

The L2B 1.5 engine is an excellent choice for: Drivers who cover a lot of city kilometers, taxi drivers (because of LPG), and people who want a simple car with cheap parts. The reliability of the engine itself is at a high level.

Avoid it if: You often drive on the highway, enjoy dynamic driving, plan to tow a trailer, or if you are buying a used car with a CVT gearbox without proof of regular gearbox oil changes.