Opel A14XEL Specifications
| Engine Model: Opel A14XEL |
| Engine Type: 4-cycle inline 4-cylinder DOHC 16-valve liquid-cooled gasoline |
| Total Displacement: 85.3 cu.in (1.39 L) |
| Rated Engine Power: 87 Hp (64 kW) at 6000 rpm |
| Fuel System Type: Multi-point electronic fuel injection |
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The Opel A14XEL is a 1.4-liter naturally aspirated
inline-four gasoline engine belonging to the GM Family 0 (Ecotec) engine family,
produced from 2009 through 2019. This powerplant was engineered as the
lower-output variant within the 1.4-liter Family 0 range, prioritizing fuel
efficiency, reduced emissions, and accessibility for lower insurance
classifications in small passenger car applications.
The engine was developed during General Motors’ consolidation of its
small-displacement powertrain strategy, incorporating dual variable valve timing
(DC-VCP) and a maintenance-free timing chain to reduce operating costs and
extend service intervals relative to earlier belt-driven engines.
The A14XEL’s architecture reflects the design principles of the Family 0 series,
which traced its origins to the 1990s but received substantial updates for Euro
5 emissions compliance. The engine features a cast iron cylinder block with an
aluminum alloy cylinder head, a combination selected for durability and thermal
management. The DOHC valvetrain operates 16 valves with roller finger followers
and hydraulic lash adjusters, eliminating the need for periodic valve clearance
adjustments.
The naturally aspirated configuration, combined with multi-point fuel injection,
delivers a linear power curve suited to urban driving conditions, with maximum
power of 64 kW (87 hp) at 6,000 rpm and maximum torque of 130 Nm (96 lb-ft) at
4,000 rpm. This engine became the primary powertrain for the Opel Corsa D
facelift, Corsa E, and Opel Adam across European markets.
The A14XEL is a four-stroke, water-cooled, naturally aspirated gasoline engine
configured for transverse mounting in front-wheel-drive vehicle architectures.
The engine incorporates dual camshaft phasers providing continuously variable
valve timing on both intake and exhaust camshafts.
Engine Type: Inline-4, 4-cycle, water-cooled, naturally aspirated.
Displacement: 1,398 cc (85.3 cu.in).
Bore: 73.4 mm (2.89 in).
Stroke: 82.6 mm (3.25 in).
Compression Ratio: 10.5:1.
Firing Order: 1-3-4-2.
Maximum Power: 64 kW (87 hp) at 6,000 rpm.
Maximum Torque: 130 Nm (96 lb-ft) at 4,000 rpm.
Redline: 6,500 rpm.
Emission Standard: Euro 5.
Valvetrain: DOHC, 16-valve (4 valves per cylinder) with DC-VCP dual variable
valve timing.
Engine Management: Bosch or Continental ECU with sequential fuel injection
control.
The cylinder block is manufactured from gray cast iron
using a high-pressure die-casting process, a material selection that provides
the rigidity and bore stability required for consistent ring sealing across the
engine’s service life. The block features a closed-deck design where the
cylinder bores are fully supported by the upper deck surface, enhancing cylinder
bore roundness under head bolt clamping loads.
The cylinder bores are machined directly into the iron casting with a
plateau-honed finish optimized for the low-friction piston ring pack. The block
incorporates a siamesed bore configuration where adjacent cylinders share common
walls, reducing overall engine length and increasing structural rigidity. Water
jackets surround the upper portion of each cylinder bore, with coolant flow
directed to the area of highest thermal stress near the combustion chamber.
The block features a five-main-bearing crankshaft support structure, with the
bearing caps manufactured from cast iron and secured with two bolts per cap. The
crankcase incorporates a deep-skirt design extending below the crankshaft
centerline, contributing to overall engine rigidity and noise reduction. An
aluminum oil pan is bolted to the lower crankcase, serving as both a lubricant
reservoir and a structural element.
Block Material: Gray cast iron.
Bore Diameter: 73.4 mm (2.89 in).
Cylinder Configuration: Inline, closed-deck, siamesed bores.
Main Bearing Quantity: 5.
Main Bearing Cap Design: Cast iron, two-bolt attachment.
The cylinder head is constructed from aluminum alloy
using a permanent mold casting process, selected for its thermal conductivity
and reduced mass relative to cast iron. The cross-flow port configuration places
intake ports on the rear side and exhaust ports on the front side for transverse
vehicle installation. The DOHC valvetrain operates 16 valves - four per cylinder
- with independent camshafts for intake and exhaust functions.
Dual continuous variable valve timing (DC-VCP) is employed on both intake and
exhaust camshafts. Hydraulic vane-type phasers mounted at the front of each
camshaft provide continuously variable adjustment of valve timing, advancing or
retarding camshaft position relative to the crankshaft based on operating
conditions. The system is controlled by the engine control unit through oil
control valves that direct pressurized oil to the phaser chambers. This
capability enables optimization of volumetric efficiency across the engine speed
range, internal exhaust gas recirculation at part load, and improved cold-start
emissions performance.
Valve actuation is accomplished via roller-type finger followers that
incorporate hydraulic lash adjusters. This design eliminates the need for
periodic valve clearance adjustments. The camshafts are supported in bearing
journals machined directly into the cylinder head casting, with bearing caps of
identical construction to ensure uniform clamping. The combustion chambers are
of a pent-roof design with centrally located spark plugs and four valves
arranged in a compact pattern promoting efficient flame propagation.
The cylinder head incorporates pressed-in valve seat inserts, with exhaust seats
manufactured from a heat-resistant nickel-based alloy to withstand elevated
temperatures. Valve guides are pressed into the head and machined to precise
internal diameters for consistent valve stem clearance.
Head Material: Aluminum alloy.
Valve Configuration: DOHC, 16-valve (4 valves per cylinder) with DC-VCP.
Intake Valve Diameter: 29.0 mm (1.14 in).
Exhaust Valve Diameter: 25.0 mm (0.98 in).
Valve Stem Diameter: 5.0 mm (0.20 in).
Valve Seat Angle: 45 degrees.
Camshaft Drive: Silent-type roller chain with automatic hydraulic tensioner.
Hydraulic Lash Adjusters: Yes, integrated into roller finger followers.
Valve Timing Adjustment Range (Intake): 60 degrees crankshaft rotation.
Valve Timing Adjustment Range (Exhaust): 60 degrees crankshaft rotation.
Interference Engine: Yes - valve-to-piston contact occurs if timing chain fails.
The fuel system employs multi-point electronic fuel
injection (MPI) with individual injectors positioned in the intake manifold
runners. This port injection design directs fuel onto the back of the intake
valves, providing intake valve cooling and maintaining valve cleanliness through
fuel detergent additives.
An in-tank electric fuel pump supplies fuel to the engine at regulated pressure.
The fuel pressure regulator is mounted on the fuel rail or integrated with the
fuel pump module, maintaining constant pressure relative to manifold vacuum. The
injectors are of the saturated-switch type with high impedance, permitting
direct drive from the engine control unit without external current-limiting
resistors.
The engine control unit calculates injector pulse width based on inputs from the
mass air flow (MAF) sensor, crankshaft position sensor, camshaft position
sensors, throttle position sensor, coolant temperature sensor, and dual oxygen
sensors. The system operates in closed-loop fuel control during steady-state
conditions, using feedback from the pre-catalyst oxygen sensors to maintain
stoichiometric air-fuel ratio.
Injection Type: Sequential multi-point fuel injection (MPI).
Fuel Pressure: 350-400 kPa (51-58 psi) with vacuum line disconnected.
Injector Resistance: 12-15 Ohms.
Fuel Requirement: 91 octane (RON) minimum; 95 octane (RON) recommended.
The lubrication system is a fully pressurized, wet-sump
design with a gear-type oil pump mounted internally at the front of the engine
and driven directly by the crankshaft. The oil pump utilizes a pair of meshing
gears to generate flow with positive displacement characteristics.
Oil is drawn from the stamped steel or cast aluminum oil pan through a mesh
strainer positioned at the sump’s lowest point. Pressurized oil passes through a
full-flow, replaceable oil filter mounted externally on the cylinder block. The
filter incorporates an anti-drainback valve to maintain gallery priming during
engine shutdown and a bypass valve that permits oil flow to continue if the
filter element becomes restricted.
From the filter, oil enters the main oil gallery cast longitudinally through the
cylinder block, supplying the crankshaft main bearings, connecting rod bearings,
camshaft bearings, hydraulic lash adjusters, and the variable valve timing
control valves. Dedicated oil passages within the cylinder head supply the
camshaft phasers and control valves.
The lubrication system incorporates a pressure relief valve that bypasses excess
oil flow back to the oil pan when system pressure exceeds the calibrated limit.
An oil pressure switch monitors system pressure and illuminates a warning
indicator if pressure falls below the specified minimum.
Oil Type: Fully synthetic 5W-30 meeting GM dexos2 specification.
Oil Capacity (with filter): 4.0 L (4.2 US qt).
Oil Pressure (at idle, warm): 100-150 kPa (15-22 psi).
Oil Pressure (at 3,000 rpm): 300-400 kPa (44-58 psi).
Oil Pump Type: Gear-type, crankshaft-driven.
The cooling system is a pressurized, liquid-cooled
design with a belt-driven centrifugal water pump mounted on the front of the
cylinder block. The water pump impeller circulates coolant through the cylinder
block water jackets, cylinder head passages, heater core, and radiator. The
system is designed to maintain consistent operating temperatures and support the
thermal management requirements of the variable valve timing system.
A wax-pellet thermostat mounted in a housing on the cylinder head outlet
regulates coolant flow to the radiator. The thermostat begins opening at a
calibrated temperature and achieves full opening within a defined temperature
range. A bypass circuit permits coolant circulation within the engine during
warm-up, bypassing the radiator until the thermostat opens. This configuration
enables rapid engine warm-up, reducing emissions and improving fuel efficiency
during cold start conditions.
The radiator is a cross-flow aluminum-plastic construction with a
high-efficiency multi-louvered core. An electric cooling fan with variable-speed
control provides forced airflow through the radiator and condenser, with fan
operation managed by the engine control unit based on coolant temperature,
vehicle speed, and air conditioning system demand. The cooling system
incorporates an integrated expansion tank with a pressure-rated cap to manage
coolant expansion and system pressurization.
Coolant Type: Ethylene-glycol based antifreeze meeting GM specification.
Coolant Capacity: 5.6 L (5.9 US qt).
Thermostat Opening Temperature: 87 °C (189 °F).
Thermostat Full Opening Temperature: 100 °C (212 °F).
Radiator Cap Pressure: 110-140 kPa (16-20 psi).
Water Pump Type: Centrifugal, belt-driven.
Ignition System: The A14XEL employs a distributorless
ignition system with individual pencil-type ignition coils mounted directly over
each spark plug (coil-on-plug). This configuration eliminates the high-voltage
distributor, reducing energy losses and improving ignition timing accuracy. The
engine control unit controls ignition timing based on crankshaft position,
camshaft position, and knock sensor feedback. A knock sensor mounted on the
cylinder block allows the ECU to retard ignition timing under detonation
conditions, protecting the engine when lower-octane fuel is used.
Intake System: The intake system incorporates a paper-element air cleaner with
an integrated resonator to reduce induction noise. Filtered air passes through a
mass air flow (MAF) sensor before entering the throttle body. The throttle body
houses an electronically controlled butterfly valve (drive-by-wire) with an
integrated idle air control function. The intake manifold is a composite plastic
design with equal-length runners tuned to the engine’s power characteristics.
Exhaust System: The exhaust manifold is a cast iron or fabricated stainless
steel design collecting exhaust gases from all four cylinders into a single
downpipe. A heated oxygen sensor mounted upstream of the catalytic converter
provides fuel trim feedback to the ECU, with a second oxygen sensor downstream
monitoring catalyst efficiency. The exhaust system incorporates a three-way
catalytic converter for Euro 5 emissions compliance.
Timing Drive: A silent-type roller chain serves as the primary timing drive,
connecting the crankshaft sprocket to the intake camshaft sprocket. A secondary
chain connects the intake camshaft to the exhaust camshaft. An automatic
hydraulic tensioner, fed by engine oil pressure, maintains optimal chain tension
throughout the engine’s operational life. The chain system is designed for the
engine’s service life without replacement under normal operating conditions.
Overall Length: 580 mm (22.8 in)
Overall Width: 620 mm (24.4 in)
Overall Height: 660 mm (26.0 in)
Dry Weight (complete engine): 115 kg (254 lb)
Engine Oil Change: 15,000 km (9,300 mi) or 1 year under
normal driving conditions.
Engine Oil Filter Change: At every oil change.
Timing Chain: Inspection for noise and stretch; no scheduled replacement
interval.
Spark Plug Replacement: 60,000 km (37,000 mi) for standard plugs.
Spark Plug Type: NGK ZFR6V-G or equivalent.
Spark Plug Gap: 0.9 mm (0.035 in).
Coolant Replacement: 120,000 km (75,000 mi) or 5 years.
Drive Belt (Accessory) Inspection: Every 15,000 km (9,300 mi) for tension,
cracking, and glazing.
Air Filter Replacement: 30,000 km (18,600 mi) or as indicated by service
indicator.
Fuel Filter: Integrated with fuel pump assembly; no scheduled replacement.
Valve Clearance Adjustment: Not required due to hydraulic lash adjusters.
Cylinder Head Bolts (M10 x 1.25): 30 Nm (22 lb-ft)
Main Bearing Cap Bolts (M8 x 1.25): 20 Nm (15 lb-ft)
Connecting Rod Cap Bolts (M7 x 1.0): 20 Nm (15 lb-ft)
Camshaft Bearing Cap Bolts (M8 x 1.25): 20-25 Nm (15-18 lb-ft)
Intake Manifold Bolts (M6 x 1.0): 10-12 Nm (89-106 lb-in)
Exhaust Manifold Nuts (M8 x 1.25): 20-25 Nm (15-18 lb-ft)
Spark Plugs: 25-30 Nm (18-22 lb-ft)
Oil Pan Bolts (M6 x 1.0): 10-12 Nm (89-106 lb-in)
Water Pump Bolts (M8 x 1.25): 20-25 Nm (15-18 lb-ft)
Timing Chain Tensioner Bolt (M14 x 1.5): 50-60 Nm (37-44 lb-ft)
Crankshaft Pulley Bolt (M16 x 1.5): 50 Nm (37 lb-ft)
Flywheel / Drive Plate Bolts (M10 x 1.25): 30 Nm (22 lb-ft)
The Opel A14XEL engine was deployed across a range of
small passenger cars produced by Opel and Vauxhall for European and select
global markets. Its application focused on entry-level and mid-grade trim levels
where fuel efficiency and lower insurance classifications were prioritized.
Opel Corsa D (Facelift): 2010-2014 model years. The A14XEL was introduced in the
Corsa D facelift as the base 1.4-liter gasoline powertrain, replacing earlier
Family 0 variants. The engine was offered in five-door hatchback, three-door
hatchback, and van body styles, paired with five-speed manual transmission or
automated manual transmission.
Opel Corsa E: 2014-2019 model years. The A14XEL continued in the Corsa E as the
entry-level 1.4-liter gasoline engine. Corsa E applications featured refinements
to the engine control unit calibration for improved fuel economy while
maintaining the 64 kW (87 hp) output rating. The engine was offered across all
Corsa E body styles.
Opel Adam: 2012-2019 model years. The A14XEL was offered in the Adam city car
range as the mid-tier gasoline powertrain, positioned between the smaller
three-cylinder engines and the higher-output 1.4-liter turbocharged variant. The
Adam application utilized the same engine calibration as the Corsa, with outputs
of 64 kW (87 hp) and 130 Nm (96 lb-ft). The engine was paired with a five-speed
manual transmission across all Adam trim levels.
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