Firing order for 4-cylinder GM engines including engine specifications

Find the firing order for 4-cylinder GM engines, along with engine specifications

The GM Ecotec engine is a family of inline four-cylinder engines produced by General Motors. The name “Ecotec” combines “eco” for ecology and economy with “tech” for technology. ECO is an acronym for Emissions Control Optimization. This article shows the firing order for 4-cylinder GM Ecotec engines, along with and engine specifications for 13 turbocharged 4-cylinder GM Ecotec engines.

Firing Order for 4-cylinder GM 1.2L LLO Ecotec Engine

Firing Order 1-3-4-2

The Ecotec 1.2L engine is a key component of GM’s lineup of compact, high-performance four-cylinder powerplants, contributing to the company’s efforts to offer more fuel-efficient and engaging vehicles in the North American market.

1.2L LLO Ecotec Firing Order: 1-3-4-2

GM 4-cylinder 1.2L LLO Engine Specifications

• Block: Cast iron

1.2L LLO turbocharged engine

• Compression Ratio: 10.5:1
• Crankshaft: Cast iron
• Connecting rods: Forged Steel
• Ignition: Coil-on-Plug, Long life 100K miles spark plugs
• Cylinder Head and valves: Cast aluminum, High performance with variable valve timing. hydraulic lash • adjuster
• Bore and Stroke: 70.50 x 80.00 mm
• Fuel System: Multiport Fuel Injection, Regular unleaded
• Horsepower: 84 hp (62.6 kW) @ 6400rpm SAE Certi􀀁ed
• Exhaust Manifold: Stainless Steel with close-coupled catalytic converter
• Cooling system: Electronically controlled thermostat in a die-cast aluminum housing.
• Throttle body: Electric Throttle Control
• Timing: Inverter tooth chain drive
• Intake manifold: Plastic
• Lubrication: Dexos 5W-20 oil with oil life monitoring

Firing Order for 4-cylinder GM 1.4L LUU Ecotec Turbo Engine

Firing Order 1-3-4-2

The 1.4LUU engine was used to generate power for the  Chevrolet Volt, the first plug-in, electrically driven, extended-range technology ever implemented in a mass-produced vehicle.

Once the battery is depleted, the Volt switches to its onboard Ecotec 1.4L (LUU) gasoline engine, which acts as a generator to extend the vehicle’s total driving range up to an impressive 379 miles. The 1.4L Ecotec engine does not provide drive power to the wheels.

GM 1.4L Ecotec LUU Firing Order: 1-3-4-2

1.4L LUU Engine Specifications

• Compression Ratio: 10.5:1
• Block: Cast iron

1.4L LUU Ecotec engine

• Crankshaft: Hollow cast iron
• Camshaft: Hollow cast iron
• Connecting rods: Cast iron
• Ignition: Coil-on-Plug
• Cylinder Head and valves: Cast aluminum, DOHC, hydraulic lash adjuster, double continuously variable cam phaser intake, 4 Valves per cylinder
• Bore and Stroke: 73.4 x 82.6 mm
• Fuel System: Sequential multi-port fuel injectors with electronic throttle control, Premium unleaded
• Horsepower: 84 hp (63 kW) @4800 rpm
• Exhaust Manifold: Stainless Steel with close-coupled catalytic converter
• Cooling system: Electronically controlled thermostat in a die-cast aluminum housing.
• Throttle body: Electric Throttle Control
• Timing: Inverter tooth chain drive
• Intake manifold: Composite
• Lubrication: Dexos 5W-20 oil with oil life monitoring

Firing Order for GM 4-cylinder 1.4L LUJ/LUV Ecotec Turbo Engine

Firing Order 1-3-4-2

The 1.4L Turbo Ecotec LUJ/LUV is used to power the Chevrolet Sonic, Cruze, and Buick Encore. The LUJ/LUV engine features an innovatively designed turbocharger that is strategically integrated within the exhaust manifold. This unique configuration offers several advantages, including reduced overall weight and enhanced packaging flexibility, making it an ideal choice for smaller vehicles where space is at a premium.

The LUJ and LUV are identical engines. Initially, General Motors planned to release an E85 capable version of the LUJ, and designate the RPO code LUV for that version. However, the LUV was never calibrated to use E85, and is therefore not E85 capable.

GM 1.4L Ecotec LUJ/LUV Firing Order: 1-3-4-2

1.4L LUJ/LUV Engine Specifications

• Compression Ratio: 9.5:1

1.4L LUU/LUV Ecotec engine

• Block: Cast iron
• Crankshaft: reinforced, solid-cast
• Camshaft: Hollow cast iron
• Connecting rods: Forged steel
• Ignition: Coil-on-Plug
• Cylinder Head and valves: Cast aluminum, DOHC, hydraulic lash adjuster, double continuously variable cam phaser intake and exhaust, 4 Valves per cylinder
• Bore and Stroke: 72.5 x 82.6 mm
• Fuel System: Sequential multi-port fuel injectors with electronic throttle control, Regular unleaded
• Exhaust Manifold: Cast iron
• Cooling system: Electronically controlled thermostat in a die-cast aluminum housing.
• Throttle body: Electric Throttle Control
• Timing: Inverter tooth chain drive
• Intake manifold: Composite
• Lubrication: Dexos 5W-20 oil with oil life monitoring
• Horsepower: 138 hp (103 kW) @4900 RPM SAE Certified

Firing Order for GM 4-cylinder 1.8L LUW/LWE Ecotec Turbo Engine

Firing Order 1-3-4-2

The 1.8L I4 Ecotec LUW/LWE engine offers a harmonious blend of performance and fuel efficiency. It achieves this by integrating advanced features like dual continuous variable cam phasing (DCVCP), a variable-geometry intake manifold, an electronically controlled thermostat, and an engine oil cooler. With its focus on low maintenance, minimal emissions, and impressive fuel economy, this engine strikes a balance between power and environmental responsibility. The 1.8L engine was used on the Chevrolet Cruze and Sonic.

GM 1.8L Ecotec LUW/LWEFiring Order: 1-3-4-2

1.8L LUW/LWE Engine Specifications

• Compression Ratio: 10.5:1

GM 1.8Lr LUW/LWE engine

• Block: Cast iron, (hollow frame)
• Crankshaft: Cast Nodular Iron
• Camshaft: Cast Chilled Iron
• Connecting rods: Forged steel
• Ignition: Coil-on-Plug
• Cylinder Head and valves: Cast aluminum, Double Continuous Variable Cam Phasing (DCVCP)
• Bore and Stroke: 80.50 x 88.2 mm
• Fuel System: Sequential fuel injection Regular unleaded
• Exhaust Manifold: Cast iron
• Cooling system: Electronically controlled thermostat in a die-cast aluminum housing.
• Throttle body: Electric Throttle Control
• Timing: Inverter tooth chain drive
• Intake manifold: Composite
• Lubrication: Dexos 5W-20 oil with oil life monitoring
• Horsepower: 138 hp (103 kW) @ 6300 rpm SAE Certified

Firing Order for GM 4-cylinder 2.4L LE5/LE9 Ecotec  Engine

Firing Order 1-3-4-2

The 2.4L Ecotec is a four-cylinder gasoline engine introduced by General Motors in 2006. It’s a naturally aspirated engine, meaning it relies on air pressure for intake instead of a turbocharger. It was discontinued in 2019.

This engine powered various Chevrolet, Saturn, Pontiac, and Buick compact and midsize vehicles, including:

Chevrolet Cobalt, Chevrolet Cobalt SS, Chevrolet Cobalt Sport, Chevrolet HHR, Chevrolet Malibu /Hybrid /ECO, Chevrolet Impala, Chevrolet Equinox, Chevrolet Captiva, Chevrolet Orlando, GMC Terrain, Pontiac G5/Pursuit, Pontiac G6, Pontiac Solstice, Saturn Sky, Saturn Ion, Saturn Aura /Green Line Hybrid, Saturn Vue /Green Line Hybrid, Buick LaCrosse, Buick GL8, Polaris Slingshot, Buick Regal, Buick Verano

GM 2.4L Ecotec LE5/LE9 Firing Order: 1-3-4-2

GM 2.4L LE5/LE9 Ecotec engine

GM 2.4L Ecotec LE5/LE9 Engine Specifications

• Compression Ratio: 10.4:1, 11.2:1
• Block: Aluminum
• Crankshaft: Cast Nodular Iron
• Camshaft: Cast Chilled Iron
• Connecting rods: Forged steel
• Ignition: Coil-on-Plug
• Cylinder Head and valves: Aluminum, Double Continuous Variable Cam Phasing (DCVCP)
• Bore and Stroke: 88.0 x 98.0 mm
• Fuel System: Sequential fuel injection Regular unleaded
• Exhaust Manifold: Cast iron
• Cooling system: Electronically controlled thermostat in a die-cast aluminum housing.
• Throttle body: Electric Throttle Control
• Timing: Inverter tooth chain drive
• Intake manifold: Composite
• Lubrication: Dexos 5W-30 oil with oil life monitoring
• Horsepower: 164-182 hp (122-136 kW)/ 6,200-6,700

Firing Order for GM 4-cylinder 2.4L LEA Ecotec  Engine

Firing Order 1-3-4-2

General Motors’ 2.4L Ecotec LEA engine features direct injection, which precisely delivers fuel for optimal power and reduced fuel consumption. It’s also FlexFuel-capable, allowing you to use E85 biofuel for a more environmentally friendly driving experience.

The Ecotec 2.4L LEA’s direct injection system offers several benefits:

• Increased Power: More power is generated from less fuel, leading to a more responsive driving experience.
• Reduced Emissions: The engine produces lower emissions overall, with a significant reduction (up to 25%) in cold-start emissions that contribute to air pollution.
• Strong Torque Delivery: The engine delivers greater pulling power (torque) at lower engine speeds (rpm) and maintains it smoothly as it reaches its peak at 4,900 rpm. This translates to confident acceleration and performance in various driving situations.

GM 2.4L Ecotec LEA Firing Order: 1-3-4-2

• Compression Ratio: 11.2:1

GM 2.4L LEA ecotec engine

• Block: Cast aluminum
• Crankshaft: Cast Nodular Iron
• Camshaft: Cast nodular iron
• Connecting rods: Forged steel
• Ignition: Coil-on-Plug
• Cylinder Head and valves: Cast aluminum, Double Continuous Variable Cam Phasing (DCVCP)
• Bore and Stroke: 88.0 x 98.0 mm
• Fuel System: Direct Injection, Regular unleaded
• Exhaust Manifold: High silicon molybdenum, cast nodular iron
• Cooling system: Electronically controlled thermostat in a die-cast aluminum housing.
• Throttle body: Electric Throttle Control
• Timing: Inverter tooth chain drive
• Intake manifold: Composite
• Lubrication: Dexos 5W-30 oil with oil life monitoring
• Horsepower: 182 hp (136 kW) @ 6700 rpm SAE Certified

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