# GM Family 0 engine

The Family 0 is a family of inline piston engines that was developed by Opel, at the time a subsidiary of General Motors. It was developed 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.
Later versions also incorporate a variable length intake manifold (VLIM) and variable valve timing (VVT).
Originally debuting as either a 1.0 L (973 cc) straight-3 or 1.2 L (1,199 cc) straight-4; a 1.4 L (1,364 cc) I4 variant was added with the introduction of the second generation, replacing the 1.4 L Family 1 engine. The Family 0 engines were produced by Opel Wien in Vienna/Aspern (Austria), by GM in Bupyeong (Korea) and Flint (Michigan, USA).

## Generation I

The engine was first introduced in the 1996 Opel Corsa, either as a three-cylinder or as a four-cylinder version. This was Opel's first three-cylinder engine.
| Name | Displacement | Configuration | Bore | Stroke | Compression Ratio | Power | Torque |
| X10XE | 1.0 L (973 cc) | I3 | 72.5 mm (2.9 in) | 78.6 mm (3.1 in) | 10.1:1 | 40.5 kW (55 PS) | 82 N⋅m (60 lb⋅ft) at 2800 rpm |
| Z10XE | 1.0 L (973 cc) | I3 | 72.5 mm (2.9 in) | 78.6 mm (3.1 in) | | 42.7 kW (58 PS) | 85 N⋅m (63 lb⋅ft) |
| X12XE | 1.2 L (1,199 cc) | I4 | 72.5 mm (2.9 in) | 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 | 1.2 L (1,199 cc) | I4 | 72.5 mm (2.9 in) | 72.6 mm (2.9 in) | 10.1:1 | 55 kW (75 PS) at 5600 rpm | 110 N⋅m (81 lb⋅ft) at 4000 rpm |
Applications:
* 2000-2004 Opel/Vauxhall Agila
* 1998-2003 Opel/Vauxhall Astra G
* 1996-2000 Opel/Vauxhall Corsa B
* 2000-2004 Opel/Vauxhall Corsa C

## Generation II

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.
| Name | Displacement | Configuration | Bore | Stroke | Compression Ratio | Power | Torque |
| Z10XEP | 1.0 L (998 cc) | I3 | 73.4 mm (2.9 in) | 78.6 mm (3.1 in) | 10.5:1 | 44 kW (60 PS) at 5600 rpm | 88 N⋅m (65 lb⋅ft) at 3800 rpm |
| Z12XEP | 1.2 L (1,229 cc) | I4 | 73.4 mm (2.9 in) | 72.6 mm (2.9 in) | 10.5:1 | 59 kW (80 PS) at 5600 rpm | 110 N⋅m (81 lb⋅ft) at 4000 rpm |
| Z14XEP | 1.4 L (1,364 cc) | I4 | 73.4 mm (2.9 in) | 80.6 mm (3.2 in) | 10.5:1 | 66 kW (90 PS) at 5600 rpm | 125 N⋅m (92 lb⋅ft) at 4000 rpm |
Applications:
* 2003-2010 Opel/Vauxhall Combo C
* 2003-2006 Opel/Vauxhall Corsa C/Holden Barina (XC)
* 2006-2014 Opel/Vauxhall Corsa D
* 2004-2009 Opel/Vauxhall Tigra TwinTop
* 2004-2010 Opel/Vauxhall Astra H
* 2005-2009 Opel/Vauxhall Astra G Classic models
* 2003-2007 Opel/Vauxhall Agila
* 2004-2010 Opel/Vauxhall Meriva A

## Generation III

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 N⋅m (162 lb⋅ft) has been added.
| Name | Displacement | Configuration | Bore | Stroke | Compression Ratio | Power | Torque |
| 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 (65 PS) at 5300 rpm | 90 N⋅m (66 lb⋅ft) at 4000 rpm |
| A12XEL (LWD) | 1.2 L (1,229 cc) | I4 | 73.4 mm (2.9 in) | 72.6 mm (2.9 in) | 10.5:1 | 51 kW (70 PS) at 5600 rpm | 115 N⋅m (85 lb⋅ft) at 4000 rpm |
| A12XER (LDC) | 1.2 L (1,229 cc) | I4 | 73.4 mm (2.9 in) | 72.6 mm (2.9 in) | 10.5:1 | 62 kW (84 PS) at 5600 rpm | 115 N⋅m (85 lb⋅ft) at 4000 rpm |
| A14XFL (LUU) | 1.4 L (1,398 cc) | I4 | 73.4 mm (2.9 in) | 82.6 mm (3.3 in) | 10.5:1 | 63 kW (85 PS) at 4800 rpm | 126 N⋅m (93 lb⋅ft) at 4800 rpm |
| A14XEL (L2Z) | 1.4 L (1,398 cc) | I4 | 73.4 mm (2.9 in) | 82.6 mm (3.3 in) | 10.5:1 | 64 kW (87 PS) at 6000 rpm | 130 N⋅m (96 lb⋅ft) at 4000 rpm |
| A14XER (LDD) | 1.4 L (1,398 cc) | I4 | 73.4 mm (2.9 in) | 82.6 mm (3.3 in) | 10.5:1 | 74 kW (100 PS) at 6000 rpm | 130 N⋅m (96 lb⋅ft) at 4000 rpm |
| A14XFR (L2N) | 1.4 L (1,398 cc) | I4 | 73.4 mm (2.9 in) | 82.6 mm (3.3 in) | 10.5:1 | 74 kW (100 PS) at 6000 rpm | 130 N⋅m (96 lb⋅ft) at 4000 rpm |
| A14NEL/B14NEL (LUH) | 1.4 L (1,364 cc) | I4 | 72.5 mm (2.85 in) | 82.6 mm (3.3 in) | 9.5:1 | 88 kW (120 PS) at 4800–6000 rpm | 200 N⋅m (148 lb⋅ft) at 1850–4200 rpm220 N⋅m (162 lb⋅ft) (Overboost) |
| A14NET (LUJ) | 1.4 L (1,364 cc) | I4 | 72.5 mm (2.85 in) | 82.6 mm (3.3 in) | 9.5:1 | 103 kW (140 PS) at 4900–6000 rpm | 200 N⋅m (148 lb⋅ft) at 1850–4900 rpm220 N⋅m (162 lb⋅ft) (Overboost) |
| U14NFT (LUJ) | 1.4 L (1,364 cc) | I4 | 72.5 mm (2.85 in) | 82.6 mm (3.3 in) | 9.5:1 | 103 kW (140 PS) at 4900–6000 rpm | 200 N⋅m (148 lb⋅ft) at 1850–4900 rpm220 N⋅m (162 lb⋅ft) (Overboost) |
| U14NFT (LUV) | 1.4 L (1,364 cc) | I4 | 72.5 mm (2.85 in) | 82.6 mm (3.3 in) | 9.5:1 | 103 kW (140 PS) at 4900 rpm | 200 N⋅m (148 lb⋅ft) at 1850 or 2500 rpm |
| B14NEH (LUJ) | 1.4 L (1,364 cc) | I4 | 72.5 mm (2.85 in) | 82.6 mm (3.3 in) | 9.5:1 | 110 kW (150 PS) at 4900-5500 rpm | 220 N⋅m (162 lb⋅ft) at 2750-4500 rpm |
Applications:
* 2011–2019 Opel/Vauxhall Corsa
* 2009–2015 Opel/Vauxhall Astra J
* 2010–2017 Opel/Vauxhall Meriva B
* 2011–2019 Opel/Vauxhall Zafira Tourer
* 2011–2015 Chevrolet Cruze
* 2016 Chevrolet Cruze Limited
* 2010–2015 Chevrolet Volt / Opel/Vauxhall Ampera
* 2012–2020 Chevrolet Aveo/Sonic
* 2013–2019 Opel Adam
* 2013–2016 Cadillac ELR
* 2013–present Buick Encore / Opel Mokka
* 2014-present Chevrolet/Holden Trax
* 2017–2019 Vanderhall Venice
* 2016- Roewe e950
* 2013-2015 Chevrolet Spin