GM Family 0 engine
Family 0 engine in an Opel Adam
|Also called||Family Zero|
|Cylinder block alloy||Cast iron|
|Cylinder head alloy||Aluminium|
|Valvetrain||Dual overhead cam|
|Oil system||Wet sump|
|Successor||Small Gasoline Engine|
The Family 0 is a family of inline piston engines that was developed by Opel, at the time a subsidiary of General Motors, as a low-displacement engine for use on entry-level subcompact cars from Opel/Vauxhall.
These engines feature a light-weight cast-iron semi-closed deck engine block with an aluminum cylinder head. The valvetrain consists of chain-driven hollowcast dual overhead camshafts (DOHC) that actuate 4-valves per cylinder via roller finger followers with hydraulic tappets. These engines also feature a 78 mm (3.1 in) bore spacing and fracture-split connecting rods.
Originally debuting as either a 1.0 L straight-3 or 1.2 L straight-4; a 1.4 L I4 variant was added with the introduction of the second generation, replacing the 1.4 L Family 1 engine. Currently, the Family 0 engines are produced by Opel Wien in Vienna/Aspern (Austria), by GM in Bupyeong (Korea) and Flint (Michigan, USA).
Generation I 
|X10XE||1.0 L (973 cc)||I3||72.5 mm (2.9 in)||78.6 mm (3.1 in)||10.1:1||40 kW (55 PS)||82 N⋅m (60 lb⋅ft) at 2800 rpm|
|Z10XE||43 kW (58 PS)||85 N⋅m (63 lb⋅ft)|
|X12XE||1.2 L (1199 cc)||I4||72.6 mm (2.9 in)||10.1:1||48 kW (65 PS) at 5600 rpm||110 N⋅m (81 lb⋅ft) at 4000 rpm|
|Z12XE||55 kW (75 PS) at 5600 rpm||110 N⋅m (81 lb⋅ft) at 4000 rpm|
The second generation Family 0 began production in November 2002. It is an updated version of the Family 0 engine and features TwinPort technology – twin intake ports with a choke closing one of the ports at low RPM, providing strong air swirl pattern for higher torque levels and better fuel economy. The crankshaft and oil galleries were also redesigned to lower power loss; thereby increasing fuel economy.
|Z10XEP||1.0 L (998 cc)||I3||73.4 mm (2.9 in)||78.6 mm (3.1 in)||10.5:1||44 kW (59 hp) at 5600 rpm||88 N⋅m (65 lb⋅ft) at 3800 rpm|
|Z12XEP||1.2 L (1229 cc)||I4||72.6 mm (2.9 in)||59 kW (79 hp) at 5600 rpm||110 N⋅m (81 lb⋅ft) at 4000 rpm|
|Z14XEP||1.4 L (1364 cc)||80.6 mm (3.2 in)||66 kW (89 hp) at 5600 rpm||125 N⋅m (92 lb⋅ft) at 4000 rpm|
- Opel Combo C
- Opel/Vauxhall Corsa/Holden Barina (XC)
- Opel/Vauxhall Tigra
- Opel/Vauxhall Astra
- Opel/Vauxhall Meriva
The EcoFlex engine is a version of the TwinPort tuned to provide better fuel economy and lower emissions. The 1.4 L engine was introduced in 2008 and the 1.0 L engine in 2010. For model year 2012, the EcoFlex engines have been updated with double cam phasing (DCVCP) in a Gen III block.
Certain Opel and US-market Chevrolet versions of the Delta II platform compact cars use a turbocharged version of the 1.4 L engine with double variable cam phasing (DCVCP); in the future, an optional gasoline direct injection system will be introduced. Opel versions feature Start&Stop system from 2011 and a Gen III block; a lower-power 120 ps version has been introduced as well. For model year 2013, the overboost to 220 Nm has been added.
|A10XEP (LDB)||1.0 L (998 cc)||I3||73.4 mm (2.9 in)||78.6 mm (3.1 in)||10.5:1||48 kW (64 hp) at 5300 rpm||90 N⋅m (66 lb⋅ft) at 4000 rpm|
|A12XEL (LWD)||1.2 L (1229 cc)||I4||72.6 mm (2.9 in)||51 kW (68 hp) at 5600 rpm||115 N⋅m (85 lb⋅ft) at 4000 rpm|
|A12XER (LDC)||62 kW (83 hp) at 5600 rpm|
|A14XFL (LUU)||1.4 L (1398 cc)||82.6 mm (3.3 in)||63 kW (84 hp) at 4800 rpm||126 N⋅m (93 lb⋅ft) at 4800 rpm|
|A14XEL (L2Z)||64 kW (86 hp) at 6000 rpm||130 N⋅m (96 lb⋅ft) at 4000 rpm|
|A14XER (LDD)||74 kW (99 hp) at 6000 rpm|
|A14NEL (LUH)||1.4 L (1364 cc)||72.5 mm (2.85 in)||9.5:1||88 kW (118 hp) at 4800–6000 rpm|
|A14NET (LUJ)||103 kW (138 hp) at 4900–6000 rpm|
|(LUV)||103 kW (138 hp) at 4900 rpm||200 N⋅m (150 lb⋅ft) at 1850 or 2500 rpm|
- 2011–present Opel/Vauxhall Corsa
- 2009–present Opel/Vauxhall Astra J
- 2010–present Opel/Vauxhall Meriva B
- 2011–present Opel/Vauxhall Zafira Tourer
- 2011–present Chevrolet Cruze
- 2011–present Chevrolet Volt / Opel/Vauxhall Ampera
- 2012–present Chevrolet Aveo/Sonic
- 2013–present Opel Adam
- 2013–2016 Cadillac ELR
- 2013–present Buick Encore / Opel Mokka
- 2014–present Chevrolet/Holden Trax
- General Motors Europe (May 2008). "A Look Into the Future of Engines and Transmissions". New 1.4 Turbo.
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