The GM LCB – Petrol is a 1,199 cc, inline‑three turbocharged engine produced from 2019 onwards. It features a dual overhead camshaft (DOHC) design with variable valve timing (VVT) and direct fuel injection, delivering responsive performance from its compact displacement. In standard form, it produces 90 kW (122 PS) and 175 Nm of torque, making it suitable for entry — level performance in small vehicles.
Fitted primarily to the Opel/Vauxhall Corsa F and Mokka, the LCB – Pet…
Production years 2019–Present meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/7890).
The GM LCB – Petrol is a 1,199 cc inline‑three turbocharged engine engineered for B-segment vehicles (2019-Present). It combines direct fuel injection with a small, single-scroll turbocharger to deliver brisk low-end response and competitive fuel economy. Designed to meet stringent Euro 6d standards, it balances urban agility with highway refinement.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,199 cc | |
Fuel type | Petrol | |
Configuration | Inline‑3, DOHC, 12‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 74.0 mm × 69.0 mm | |
Power output | 90 kW (122 PS) @ 5,500 rpm | |
Torque | 175 Nm @ 2,000-4,500 rpm | |
Fuel system | Gasoline Direct Injection (GDI) | |
Emissions standard | Euro 6d | |
Compression ratio | 10.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single-scroll (Mitsubishi Heavy Industries) | |
Timing system | Chain-driven | |
Oil type | GM Dexos 2 (SAE 5W‑30) | |
Dry weight | 98 kg |
The GM LCB – Petrol was used across GM's global EMP2 platform with transverse mounting. This engine received platform-specific adaptations-including unique engine mounts for the Opel Mokka and revised cooling packages for the Opel Corsa-creating minor interchange considerations. All adaptations are documented in OEM technical bulletins.
The LCB – Petrol's primary reliability consideration is intake valve carbon buildup, a systemic trait of its direct-injection design. GM internal service data indicates this is a manageable maintenance item rather than a critical failure point. Adherence to the specified oil type and driving patterns that allow GPF regeneration are key to long-term performance.
Analysis derived from GM technical bulletins (2019-2023) and aggregated owner-reported data (2020-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The GM LCB – Petrol is designed for reliability with proper maintenance. Its main known consideration is intake valve carbon buildup, which is manageable with periodic cleaning. The turbocharger and timing chain are robust. Using the correct GM Dexos 2 oil and adhering to service intervals is crucial. Many examples are expected to exceed 150,000 km without major issues.
The most frequent issues are carbon buildup on intake valves (causing rough idle) and potential GPF blockage from short-trip driving. High-pressure fuel pump failure and oil leaks from the cam cover are also reported as the engine ages. These are well-documented in GM service information.
This 1.2L turbo engine is used in the current generation Opel/Vauxhall Corsa F (2019-Present) and Opel Mokka B (2020-Present). It's a key engine for GM's small car and crossover lineup in Europe, offering a balance of performance and efficiency.
Yes, the LCB responds well to ECU remapping. Stage 1 tunes can reliably produce around 105-110 kW (140-150 PS) and 200-210 Nm of torque by adjusting boost pressure and ignition timing. The stock internals are strong enough for these gains. More power requires upgraded turbo and injectors.
Real-world fuel economy is around 6.0-7.0 L/100km (40-47 mpg UK) combined, depending on the vehicle and driving style. Highway cruising can achieve 5.0 L/100km (56 mpg UK), while city driving may consume 7.5 L/100km (38 mpg UK). It's very efficient for a turbocharged engine.
Yes. The GM LCB – Petrol is an interference engine. If the timing chain fails or jumps, the pistons will collide with the open valves, causing catastrophic internal damage. This underscores the importance of addressing any timing chain noise immediately, although failures are rare.
GM mandates the use of Dexos 2 specification oil, typically in 5W-30 viscosity. This low-SAPS (Sulphated Ash, Phosphorus, Sulphur) oil is crucial for protecting the turbocharger, GPF, and emissions components. Using non-Dexos oil can void warranties and lead to premature wear.
Comprehensive technical documentation and regulatory references
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GM Official Site
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
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