{{Infobox automobile engine | name = Family 0 | manufacturer = General Motors | production = 1996–2022 | aka = Family Zero | image = Opel_Adam_Motorraum.JPG | caption = Family 0 engine in an Opel Adam | predecessor = {{ubl |Opel OHV engine|GM Family 1 engine (1.0 – 1.4L)}} | successor = Small Gasoline Engine | configuration = Straight-3, Straight-4 | displacement = {{ubl |{{convert|973|cc|cuin|abbr=on}}|{{convert|998|cc|cuin|abbr=on}}|{{convert|1199|cc|cuin|abbr=on}}|{{convert|1229|cc|cuin|abbr=on}}|{{convert|1364|cc|cuin|abbr=on}}|{{convert|1398|cc|cuin|abbr=on}}}} | bore = {{ubl |{{convert|72.5|mm|in|abbr=on}}|{{convert|73.4|mm|in|abbr=on}}}} | stroke = {{ubl |{{convert|72.6|mm|in|abbr=on}}|{{convert|78.6|mm|in|abbr=on}}|{{convert|80.6|mm|in|abbr=on}}|{{convert|82.6|mm|in|abbr=on}}}} | compression = 9.5:1, 10.1:1, 10.5:1 | oilsystem = Wet sump | coolingsystem = Water-cooled | block = Cast iron | head = Aluminium | valvetrain = DOHC 4 valves x cyl. with VVT | fuelsystem = Sequential MPFI | fueltype = Gasoline, E85 | power = {{cvt|55-150|PS|kW|0}} | torque = {{cvt|82-220|Nm|lbft|0}} }}
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 {{convert|78|mm|in|abbr=on}} 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 {{convert|973|cc|L|1|disp=flip|abbr=on}} straight-3 or {{convert|1199|cc|L|1|disp=flip|abbr=on}} straight-4; a {{convert|1364|cc|L|1|disp=flip|abbr=on}} 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 {{anchor|X10XE|Z10XE|X12XE|Z12XE}}==
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.
{| class=wikitable |- !Name!!Configuration!!Bore!!Stroke!!{{Tooltip|CR|Compression ratio}}!!Power!!Torque |- |''X10XE''||rowspan=2| {{convert|973|cc|L|1|disp=flip|abbr=on}} I3|| rowspan="4" |{{convert|72.5|mm|in|1|abbr=on}}||rowspan=2|{{convert|78.6|mm|in|1|abbr=on}}||10.1:1||{{cvt|55|PS|kW|0|disp=flip}}||{{cvt|82|Nm|lbft|0}} at 2800 rpm |- |''Z10XE''||||{{cvt|58|PS|kW|0|disp=flip}}||{{cvt|85|Nm|lbft|0}} |- |''X12XE''||rowspan=2| {{convert|1199|cc|L|1|disp=flip|abbr=on}} I4|| rowspan="2" |{{convert|72.6|mm|in|1|abbr=on}}||rowspan=2|10.1:1||{{cvt|65|PS|kW|0|disp=flip}} at 5600 rpm||rowspan=2|{{cvt|110|Nm|lbft|0}} at 4000 rpm |- |''Z12XE''||{{cvt|75|PS|kW|0|disp=flip}} at 5600 rpm |}
Applications:
* 1996–2000 Opel/Vauxhall Corsa B * 1998–2003 Opel/Vauxhall Astra G * 2000–2004 Opel/Vauxhall Corsa C * 2000–2004 Opel/Vauxhall Agila
==Generation II{{Anchor|Z10XEP|Z12XEP|Z14XEP|Twinport}}== 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.
{| class=wikitable |- !Name!!Configuration!!Bore!!Stroke!!{{Tooltip|CR|Compression ratio}}!!Power!!Torque |- ||''Z10XEP''||{{convert|998|cc|L|1|disp=flip|abbr=on}} I3|| rowspan="3" |{{convert|73.4|mm|in|1|abbr=on}}||{{convert|78.6|mm|in|1|abbr=on}}||rowspan=3|10.5:1||{{cvt|60|PS|kW|0|disp=flip}} at 5600 rpm||{{cvt|88|Nm|lbft|0}} at 3800 rpm |- ||''Z12XEP''||{{convert|1229|cc|L|1|disp=flip|abbr=on}} I4||{{convert|72.6|mm|in|1|abbr=on}}||{{cvt|80|PS|kW|0|disp=flip}} at 5600 rpm||{{cvt|110|Nm|lbft|0}} at 4000 rpm |- ||''Z14XEP''||{{convert|1364|cc|L|1|disp=flip|abbr=on}} I4||{{convert|80.6|mm|in|1|abbr=on}}||{{cvt|90|PS|kW|0|disp=flip}} at 5600 rpm||{{cvt|125|Nm|lbft|0}} at 4000 rpm |}
Applications: * 2003–2010 Opel/Vauxhall Combo C * 2003–2006 Opel/Vauxhall Corsa C/Holden Barina (XC) * 2003–2007 Opel/Vauxhall Agila * 2004–2009 Opel/Vauxhall Tigra TwinTop * 2004–2010 Opel/Vauxhall Astra H * 2004–2010 Opel/Vauxhall Meriva A * 2005–2009 Opel/Vauxhall Astra G Classic models * 2006–2014 Opel/Vauxhall Corsa D
== 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 dual continuous variable 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 dual continuous variable cam phasing (DCVCP); in the future, an optional gasoline direct injection system will be introduced.<ref name=1.4_DI>{{cite web | url=http://mediaassets.gmeuropearchive.info/viewcatalogue.php?catid=108560&lng=EN|title = A Look Into the Future of Engines and Transmissions| author=General Motors Europe|date=May 2008|at= New 1.4 Turbo }}</ref> Opel versions feature a start-stop system from 2011 and a ''Gen III'' block; a lower-power {{Convert|120|PS|kW hp|0|abbr=unit}} version has been introduced as well. For model year 2013, the overboost to {{convert|220|Nm|lbft|0|abbr=on}} has been added.<ref>{{cite web |url=http://media.opel.com/media/intl/en/opel/news.detail.html/content/Pages/news/intl/en/2012/opel/06_15_new-astra-family.html |title = Opel {{!}} Stellantis}}</ref> {| class=wikitable |- !Name!!Configuration!!Bore!!Stroke!!{{Tooltip|CR|Compression ratio}}!!Power!!Torque |- ||''A10XEP'' (LDB)||rowspan=1|{{convert|998|cc|L|1|disp=flip|abbr=on}} I3|| rowspan="7" |{{convert|73.4|mm|in|1|abbr=on}}||rowspan=1|{{convert|78.6|mm|in|1|abbr=on}}||rowspan=7|10.5:1||{{cvt|65|PS|kW|0|disp=flip}} at 5300 rpm||{{cvt|90|Nm|lbft|0}} at 4000 rpm |- ||''A12XEL'' (LWD)||rowspan=2|{{convert|1229|cc|L|1|disp=flip|abbr=on}} I4|| rowspan="2" |{{convert|72.6|mm|in|1|abbr=on}}||{{cvt|70|PS|kW|0|disp=flip}} at 5600 rpm||rowspan=2|{{cvt|115|Nm|lbft|0}} at 4000 rpm |- ||''A12XER'' (LDC)||{{cvt|84|PS|kW|0|disp=flip}} at 5600 rpm |- ||''A14XFL'' (LUU)||rowspan=4|{{convert|1398|cc|L|1|disp=flip|abbr=on}} I4|| rowspan="9" |{{convert|82.6|mm|in|1|abbr=on}}||{{cvt|85|PS|kW|0|disp=flip}} at 4800 rpm||{{cvt|126|Nm|lbft|0}} at 4800 rpm |- ||''A14XEL'' (L2Z)||{{cvt|87|PS|kW|0|disp=flip}} at 6000 rpm||rowspan=3|{{cvt|130|Nm|lbft|0}} at 4000 rpm |- ||''A14XER'' (LDD)||rowspan=2|{{cvt|100|PS|kW|0|disp=flip}} at 6000 rpm |- ||''A14XFR'' (L2N) |- ||''A14NEL/B14NEL'' (LUH)||rowspan=5|{{convert|1364|cc|L|1|disp=flip|abbr=on}} I4 turbo|| rowspan="5" |{{convert|72.5|mm|in|abbr=on}}||rowspan=5|9.5:1||{{cvt|120|PS|kW|0|disp=flip}} at 4800–6000 rpm||{{ubl | {{cvt|200|Nm|lbft|0}} at 1850–4200 rpm | {{cvt|220|Nm|lbft|0}} (Overboost)}} |- ||''A14NET'' (LUJ)||rowspan=2|{{cvt|140|PS|kW|0|disp=flip}} at 4900–6000 rpm||rowspan=2|{{ubl | {{cvt|200|Nm|lbft|0}} at 1850–4900 rpm | {{cvt|220|Nm|lbft|0}} (Overboost)}} |- ||''U14NFT'' (LUJ) |- ||''U14NFT'' (LUV)||{{cvt|140|PS|kW|0|disp=flip}} at 4900 rpm||{{cvt|200|Nm|lbft|0}} at 1850 or 2500 rpm |- ||''B14NEH'' (LUJ)||{{cvt|150|PS|kW|0|disp=flip}} at 4900–5500 rpm|| {{ubl | {{cvt|220|Nm|lbft|0}} at 2750–4500 rpm |} thumb|Turbo engine in production
Applications: *2009–2015 Opel/Vauxhall Astra J *2010–2015 Chevrolet Volt / Opel/Vauxhall Ampera *2010–2017 Opel/Vauxhall Meriva B *2011–2019 Opel/Vauxhall Corsa *2011–2019 Opel/Vauxhall Zafira Tourer *2011–2015 Chevrolet Cruze, 2016 Chevrolet Cruze Limited *2012–2020 Chevrolet Aveo/Sonic *2013–2019 Opel Adam *2013–2016 Cadillac ELR *2013–2022 Buick Encore / Opel Mokka *2014–2022 Chevrolet/Holden Trax *2013–2015 Chevrolet Spin *2016{{En dash}}2022 Roewe e950 *2017–2019 Vanderhall Venice<ref name="venice">https://vanderhallusa.com/venice/ (d/l 10-Jul-2019)</ref>
== References == {{reflist}}
{{commons cat}} {{GM late engine timeline}}
Family 0 Category:Straight-three engines Category:Straight-four engines Category:Gasoline engines by model Category:1990s automobile engines