Opel B14NEJ Specifications
| Engine Model: Opel B14NEJ |
| Engine Type: 4-cycle 4-cylinder DOHC 16-valve turbocharger liquid-cooled gasoline |
| Total Displacement: 83.2 cu.in (1.36 L) |
| Rated Engine Power: 101 Hp (74 kW) at 6000 rpm |
| Fuel System Type: Sequential multi-point fuel injection |
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The Opel B14NEJ is a 1.4-liter turbocharged inline-four
petrol engine belonging to the GM Family 0 Ecotec series, produced from 2014
through 2019 as a Euro 6-compliant successor to the earlier A14NEL. This
powerplant was engineered specifically as a detuned performance variant for the
fifth-generation Opel Corsa (Corsa E), where it occupied the position between
the naturally aspirated 1.4-liter and the higher-output 1.4 Turbo variants
within the Corsa lineup. The engine’s configuration prioritizes low-end torque
delivery and fuel efficiency while maintaining the compact dimensions required
for transverse installation in the supermini segment.
The engine’s architecture centers on a 1,364 cc displacement achieved through a
72.5 mm bore and 82.6 mm stroke, a long-stroke design favorable for torque
production in turbocharged applications. The double overhead camshaft (DOHC)
valvetrain incorporates dual variable valve timing (VVT) on both intake and
exhaust camshafts, allowing for optimized valve overlap across the operating
range. The timing chain drive eliminates the maintenance requirements associated
with belt-driven systems, while the multi-point fuel injection (MPI) system
provides a simpler, more robust alternative to direct injection, reducing the
risk of intake valve deposit accumulation.
Power output is rated at 74 kW (101 hp) from 3,500 to 6,000 rpm, with peak
torque of 200 Nm (148 lb-ft) available across a broad plateau from 1,850 to
3,500 rpm. This torque characteristic delivers strong low-end response suited to
urban driving conditions while maintaining adequate power for highway cruising.
The compression ratio of 9.5:1 is calibrated for turbocharged operation with
multi-point injection, balancing thermal efficiency with resistance to knock
under boost pressure.
The turbocharger with intercooler provides forced induction across the operating
range, with maximum boost pressure managed by an electronically controlled
wastegate. The B14NEJ was developed specifically for the Corsa E application and
did not appear in other Opel models during its production lifecycle.
The B14NEJ operates on a four-stroke gasoline cycle with turbocharged induction
and multi-point fuel injection. The engine utilizes an inline four-cylinder
configuration with a double overhead camshaft (DOHC) and four valves per
cylinder.
Engine Type: Inline-4, water-cooled, 4-stroke, turbocharged gasoline.
Displacement: 1,364 cc (83.2 cu.in).
Bore: 72.5 mm (2.85 in).
Stroke: 82.6 mm (3.25 in).
Compression Ratio: 9.5:1.
Firing Order: 1-3-4-2.
Idle Speed: 700-750 rpm, electronically controlled.
Maximum Engine Speed: 6,500 rpm with fuel cut-off at 6,800 rpm.
Maximum Power: 74 kW (101 hp) @ 3,500-6,000 rpm.
Maximum Torque: 200 Nm (148 lb-ft) @ 1,850-3,500 rpm.
Fuel System: Sequential multi-point fuel injection (MPI) with four injectors
positioned in the intake manifold runners.
Aspiration: Turbocharged with air-to-air intercooler.
The cylinder block is constructed from cast iron with
an open-deck design. This material choice provides the structural rigidity
required for turbocharged operation while maintaining the dimensional stability
necessary for consistent sealing under elevated cylinder pressures. The block
features a deep-skirt design that extends below the crankshaft centerline,
contributing to overall engine rigidity and vibration reduction.
The cylinder bores are integrally cast into the block with no replaceable
liners. Each bore is induction-hardened to provide a durable wear surface for
the piston rings. The water jackets surrounding the cylinder bores are
configured to provide uniform cooling across the entire height of the piston
travel, an important characteristic for the long-stroke 82.6 mm design.
Main bearing caps are manufactured from nodular cast iron and are secured with
four bolts each - two vertical bolts through the cap and two horizontal
cross-bolts through the lower crankcase structure. This cross-bolted arrangement
provides superior crankshaft support under the loads generated by turbocharged
operation.
Crankshaft: Cast iron with five main bearings, fully counter-weighted with eight
counterweights. The crankshaft features induction-hardened bearing surfaces and
incorporates a torsional vibration damper at the front end.
Main Bearing Journal Diameter: 52.0 mm (2.05 in)
Connecting Rod Journal Diameter: 45.0 mm (1.77 in)
Connecting Rods: Forged steel with a fracture-split cap design
Piston Material: Cast aluminum alloy with anodized ring grooves and a
low-friction skirt coating. The piston crown incorporates a recessed design to
promote mixture motion during the intake and compression strokes. Piston
Cooling: Oil spray jets mounted in the crankcase direct engine oil to the
underside of each piston crown. These jets are calibrated to activate at oil
pressures above 150 kPa (22 psi).
The cylinder head is a single-piece cast aluminum alloy
construction spanning all four cylinders. The DOHC configuration places two
camshafts in the head - one intake and one exhaust - operating four valves per
cylinder through inverted bucket-type tappets.
Valvetrain: Double overhead camshaft (DOHC) with four valves per cylinder,
totaling 16 valves. Dual variable valve timing (VVT) is incorporated on both the
intake and exhaust camshafts, allowing for independent adjustment of valve
timing across a range of up to 50 degrees of crankshaft rotation. Hydraulic lash
adjusters are integrated into the bucket tappets, eliminating the need for valve
clearance adjustment throughout the engine’s service life.
Intake Valve Diameter: 30.0 mm (1.18 in)
Exhaust Valve Diameter: 26.0 mm (1.02 in)
Valve Lift (Intake): 9.0 mm (0.354 in)
Valve Lift (Exhaust): 9.0 mm (0.354 in)
Valve Seat Material: High-strength sintered alloy with induction-hardened
contact surfaces. Valve Spring Material: High-tensile steel with a beehive
design to reduce reciprocating mass and prevent valve float at elevated engine
speeds.
Camshaft Drive: Silent-type Morse timing chain with an automatic hydraulic
tensioner. The chain drives from a sprocket on the crankshaft to the intake
camshaft sprocket, with a secondary chain transferring drive from the intake to
the exhaust camshaft. The chain system is designed for the engine’s service life
with no scheduled replacement interval.
The fuel system is a sequential multi-point fuel
injection system with individual injectors positioned in the intake manifold
runners immediately upstream of each intake valve. This port injection
configuration provides precise fuel delivery while maintaining the simplicity
and serviceability advantages of an external injection system.
Fuel Injectors: High-impedance solenoid-type injectors with a multi-hole nozzle
design for improved fuel atomization. The injectors are electrically actuated by
the engine control unit in sequence with the engine’s firing order.
Fuel Pressure: 350-400 kPa (51-58 psi) regulated by a vacuum-referenced pressure
regulator mounted on the fuel rail. Fuel Rail: Composite resin or aluminum rail
shared across all four cylinders. Intake Manifold: Composite resin construction
with integrated charge air cooler mounting. The manifold incorporates a compact
plenum feeding four individual runners.
Throttle Body: Electronically controlled drive-by-wire system with a bore
diameter of 55 mm (2.17 in). Idle speed is managed through electronic throttle
plate positioning, with no separate idle air control valve. Fuel Requirement:
Minimum octane rating of 95 RON (91 AKI) for optimal performance; 91 RON (87
AKI) is permissible with reduced output.
The lubrication system is a fully pressurized wet-sump
design with a gear-type oil pump mounted on the front of the engine. The pump is
driven directly by the crankshaft through the timing chain system and
incorporates a pressure relief valve.
Oil Pump Type: Gear-type pump with integrated pressure relief valve. Recommended
Oil Viscosity: 5W-30 or 5W-40 fully synthetic meeting GM dexos2 specification.
Synthetic oil is required for turbocharger protection and extended drain
intervals.
Oil Capacity (including filter): 4.0 liters (4.2 qt).
Oil Pressure (at idle, warm): 100-150 kPa (15-22 psi).
Oil Pressure (at 3,000 rpm, warm): 300-400 kPa (44-58 psi).
Oil Filter Type: Spin-on full-flow filter with integral bypass valve and
anti-drainback valve.
Oil Cooler: Water-to-oil heat exchanger integrated into the oil filter mounting
base, utilizing engine coolant to stabilize oil temperatures under sustained
turbocharged operation. Oil Pan: Stamped steel with integrated baffling.
The cooling system is a pressurized, thermostatically
controlled circuit utilizing a belt-driven centrifugal water pump. The system is
designed to manage the thermal loads of the turbocharged gasoline combustion
process while maintaining consistent operating temperatures.
Water Pump Type: Centrifugal with a mechanical seal, mounted to the front of the
cylinder block and driven by the accessory drive belt. Coolant Type:
Ethylene-glycol based antifreeze meeting GM specification, phosphate and
silicate-free formulation. Coolant Capacity (engine and radiator): 5.1 liters
(5.4 qt).
Thermostat: Wax-type thermostat with an opening temperature of 90 °C (194 °F)
and a full-open temperature of 103 °C (217 °F). Radiator: Cross-flow aluminum
radiator with plastic tanks. Charge Air Cooling: Air-to-air intercooler mounted
in front of the radiator. Cooling Fan: Electric fan assembly controlled by
engine coolant temperature sensor and air conditioning system demand.
Single fixed-geometry turbocharger manufactured by
Mitsubishi Heavy Industries or BorgWarner depending on production date. The
turbocharger features a wastegate controlled by an electronic solenoid valve.
Maximum boost pressure is 0.8 bar absolute (12 psi gauge) under full load
conditions. The turbocharger bearing housing is cooled by engine coolant and
lubricated by engine oil.
Distributorless ignition system with coil-on-plug
configuration. Each cylinder has an individual ignition coil mounted directly
over the spark plug, eliminating high-tension spark plug wires. Ignition timing
is controlled by the engine control unit based on crankshaft position, camshaft
position, knock sensor inputs, and engine load. Spark Plugs: NGK IFR6T-11 or
equivalent iridium. Spark Plug Gap: 0.6-0.7 mm (0.024-0.028 in).
Timing Drive: Silent-type Morse timing chain with an
automatic hydraulic tensioner. The tensioner utilizes engine oil pressure to
maintain chain tension and incorporates a mechanical ratchet to prevent slack
during engine start-up before oil pressure builds. The chain guides are
manufactured from nylon-faced aluminum. The system is designed for the engine’s
service life under normal operating conditions.
Accessory Drive: Single 6-rib serpentine belt driving the alternator, water
pump, and air conditioning compressor. A spring-loaded automatic tensioner
maintains belt tension.
Engine Management System: Bosch or Continental electronic control unit (ECU)
with integrated fuel injection control, ignition timing control, variable valve
timing actuation, boost pressure control, and diagnostic functions. The ECU
utilizes a Mass Air Flow (MAF) sensor for load detection.
Exhaust System: Cast iron exhaust manifold with integrated mounting for the
turbocharger. The exhaust system incorporates a close-coupled three-way
catalytic converter for rapid light-off during cold starts. The system meets
Euro 6 emissions standards.
Overall Length: 620 mm (24.4 in)
Overall Width: 650 mm (25.6 in)
Overall Height: 710 mm (28.0 in)
Dry Weight (complete engine): 120 kg (265 lb)
Engine Oil and Filter Change: 15,000 km (9,000 mi) or
12 months for fully synthetic oil; reduced intervals of 10,000 km (6,000 mi) for
severe service including frequent cold starts, extended idling, or short-trip
operation. Timing Chain: No scheduled replacement interval. Chain inspection is
recommended if abnormal noise or camshaft correlation diagnostic trouble codes
are present. Valve Clearance: Hydraulic lash adjusters eliminate the need for
valve clearance inspection or adjustment throughout the engine’s service life.
Fuel Filter: Integrated into the fuel pump module within the fuel tank; no
scheduled replacement interval. Engine Air Filter Element: Replace every 30,000
km (18,000 mi) or when visibly contaminated. Coolant Replacement: 80,000 km
(48,000 mi) or 4 years. Drive Belt Inspection: Every 15,000 km (9,000 mi) for
cracks, fraying, glazing, and proper tension. Drive Belt Replacement: 80,000 km
(48,000 mi) or 4 years. Spark Plug Replacement: 60,000 km (37,000 mi) for
iridium plugs.
Cylinder Head Bolts, Step 1: 30 Nm (22 lb-ft)
Cylinder Head Bolts, Step 2: 60 Nm (44 lb-ft) + 90° turn
Main Bearing Cap Bolts, Step 1: 30 Nm (22 lb-ft)
Main Bearing Cap Bolts, Step 2: 60 Nm (44 lb-ft) + 90° turn
Connecting Rod Cap Bolts: 30 Nm (22 lb-ft) + 90° turn
Camshaft Bearing Caps: 15 Nm (11 lb-ft)
Camshaft Sprocket Bolts: 70 Nm (52 lb-ft)
Timing Chain Tensioner: 25 Nm (18 lb-ft)
Intake Manifold to Cylinder Head: 20 Nm (15 lb-ft)
Exhaust Manifold to Cylinder Head: 25 Nm (18 lb-ft)
Turbocharger to Exhaust Manifold: 28 Nm (21 lb-ft)
Turbocharger Oil Feed Line: 25 Nm (18 lb-ft)
Turbocharger Water Lines: 25 Nm (18 lb-ft)
Oil Pan Bolts: 12 Nm (9 lb-ft) + 45° turn
Valve Cover Bolts: 10 Nm (7 lb-ft)
Spark Plugs: 20 Nm (15 lb-ft)
Crankshaft Pulley Bolt: 180 Nm (133 lb-ft) + 90° turn
Flywheel / Flexplate Bolts: 60 Nm (44 lb-ft) + 90° turn
Engine Mount Brackets to Block: 50 Nm (37 lb-ft)
The B14NEJ engine was developed specifically for the
Opel Corsa E supermini platform and was not offered in other Opel or Vauxhall
models during its production lifecycle.
Opel Corsa E (2014-2019): The fifth-generation Corsa received the B14NEJ as the
mid-range turbocharged petrol engine option, positioned between the naturally
aspirated 1.4-liter and the higher-output 1.4 Turbo (B14NET) variants. The
engine was offered in the Corsa E hatchback in both three-door and five-door
body styles, mounted transversely with front-wheel drive.
Transmission options included a six-speed manual gearbox or a six-speed
automatic (Easytronic) depending on market and trim level. The Corsa E
application utilized the 200 Nm (148 lb-ft) torque calibration, with the engine
management system tuned to deliver peak torque from 1,850 rpm to optimize urban
driving response. The B14NEJ remained in production until the Corsa E was
replaced by the Corsa F in 2019.
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