Volvo B4204T6 Specifications
| Engine Model: Volvo B4204T6 |
| Engine Type: 4-cycle inline 4-cylinder DOHC 16-valve VVT
turbo liquid-cooled gasoline |
| Total Displacement: 122 cu.in (1.99 L) |
| Rated Engine Power: 200 hp (149 kW) at 6000 rpm |
| Fuel System Type: Gasoline direct injection |
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The Volvo B4204T6 is a 2.0-liter, turbocharged,
inline-4 gasoline engine produced during a transitional period in Volvo’s
history, from approximately 2010 to 2012. This engine represents a departure
from Volvo’s in-house developed modular “Whiteblock” engine family, instead
being derived from the Ford EcoBoost architecture - a consequence of Ford’s
ownership of Volvo (1999-2010).
The B4204T6 emerged as part of Volvo’s strategy to adopt advanced,
high-efficiency powertrains capable of meeting Euro 5 emission standards while
delivering competitive performance. Utilizing a compact 1,999 cc displacement
with a bore and stroke of 87.5 mm x 83.1 mm, the engine combines gasoline direct
injection (SIDI) with a turbocharger and intercooler to produce 203 hp and 300
Nm of torque - a torque plateau that extends from 1,750 rpm to 4,000 rpm. The
engine is constructed with an aluminum cylinder block and cylinder head,
features a chain-driven Double Overhead Camshaft (DOHC) valvetrain, and is
managed by a Bosch MED 17.0 engine control unit.
Marketed under the “2.0T” designation in Volvo’s S60, V60, S80, V70, and XC60
models, the B4204T6 served as a high-output alternative to naturally aspirated
and lower-displacement forced-induction offerings before the “T5” nomenclature
was standardized across the lineup. Its Ford-derived heritage means shared
componentry with contemporary Ford Mondeo and Focus ST models, particularly in
the turbocharger and high-pressure fuel systems.
Engine Code: B4204T6
Engine Family: Ford EcoBoost architecture (Volvo adaptation)
Configuration: Inline 4-cylinder
Valvetrain: Double Overhead Camshaft (DOHC), 16 valves, chain-driven
Displacement: 1999 cc (122.0 cu.in)
Bore: 87.5 mm (3.44 in)
Stroke: 83.1 mm (3.27 in)
Compression Ratio: 10.0:1
Firing Order: 1-3-4-2
Fuel System: Gasoline Direct Injection
Fuel Injection Pressure: Up to 150 bar (2175 psi)
Aspiration: Single turbocharger with air-to-air intercooler
Engine Management: Bosch MED 17.0
Maximum Power: 203 PS (149 kW; 200 hp) at 6000 rpm
Maximum Torque: 300 Nm (221 lb-ft) from 1750 to 4000 rpm
Maximum Engine Speed: 6500 rpm (fuel cut-off)
Emission Standard: Euro 5
The cylinder block is constructed from aluminum alloy
with cast-in iron cylinder liners, a design that balances the thermal efficiency
and weight reduction of aluminum construction with the wear resistance and bore
stability of iron liner technology. The block features an open-deck
configuration, where the cylinder bores are supported by the water jacket at the
upper deck, enhancing cooling flow around the upper cylinder region while
maintaining structural integrity through reinforced bulkheads at the main
bearing supports.
The crankshaft is manufactured from forged steel and is supported by five main
bearing caps that are integrated into a structural aluminum bedplate - a lower
crankcase section that bolts to the block, significantly increasing bottom-end
rigidity and reducing crankshaft flex under high cylinder pressures. The
connecting rods are manufactured from powdered metal (sintered) with
fracture-split caps, ensuring precise bearing bore geometry and consistent
clamping force.
The pistons are aluminum alloy with a low-friction skirt coating and a
bowl-in-crown design that directs the fuel spray from the direct injectors to
optimize mixture formation. Piston cooling jets are integrated into the cylinder
block, directing a continuous spray of engine oil to the underside of each
piston crown to manage thermal loads under sustained high-boost operation.
The cylinder head is manufactured from aluminum alloy
and houses a Double Overhead Camshaft (DOHC) arrangement with four valves per
cylinder. The camshafts are hollow to reduce rotational mass and are driven by a
silent-type timing chain. The intake camshaft is equipped with a continuously
variable valve timing mechanism, allowing the Engine Control Module (ECM) to
adjust intake valve opening and closing events across the engine operating range
to optimize volumetric efficiency, reduce pumping losses, and improve idle
stability.
The valvetrain employs roller finger followers with hydraulic lash adjusters,
eliminating the need for periodic valve clearance adjustments while reducing
friction at the cam-to-follower interface. The combustion chamber is a compact
pent-roof design with a centrally located spark plug and a direct injector
positioned between the intake valves.
The injector location is optimized to deliver fuel directly into the combustion
chamber at pressures up to 150 bar, creating a stratified charge under
light-load conditions and a homogeneous mixture under high-load operation. The
intake valves are manufactured from steel with a nitrided surface treatment for
wear resistance, while the exhaust valves are manufactured from high-temperature
nickel-based alloy with hollow stems partially filled with sodium to enhance
heat transfer from the valve head to the valve guide.
The fuel system employs a high-pressure gasoline direct
injection (SIDI) architecture. A low-pressure electric fuel pump within the fuel
tank delivers fuel at 5.0 bar (72.5 psi) to a high-pressure fuel pump mounted on
the cylinder head. This high-pressure pump is driven by a dedicated cam lobe on
the intake camshaft and generates fuel pressures up to 150 bar (2175 psi).
The fuel rail distributes pressurized fuel to four solenoid-actuated direct
injectors, each mounted centrally in the cylinder head and spraying directly
into the combustion chamber. The injectors are capable of delivering multiple
injection events per combustion cycle, including up to three injection pulses
during the intake and compression strokes to enable stratified charge combustion
under light loads, reducing fuel consumption.
The Bosch MED 17.0 engine management system controls injection timing, injection
duration, and fuel rail pressure based on inputs from the crankshaft position
sensor, camshaft position sensor, high-pressure fuel sensor, mass airflow
sensor, and wideband oxygen sensors. The system includes a fuel pressure relief
valve and a fuel temperature sensor integrated into the high-pressure pump
assembly.
The lubrication system is a pressurized, full-flow
wet-sump design utilizing a variable-displacement vane-type oil pump. The oil
pump is mounted to the front of the crankshaft and incorporates a control valve
that adjusts oil pump output based on engine speed, load, and temperature,
reducing parasitic losses at low engine speeds while maintaining adequate flow
at high speeds.
The oil pump draws fluid from a pressed-steel or aluminum oil pan, with a total
system capacity of 5.4 liters (5.7 qt) including the filter. A cartridge-type
oil filter is housed in a plastic filter housing mounted to the cylinder block,
with a replaceable filter element. The recommended oil viscosity is 5W-30 or
0W-30, meeting ACEA A5/B5 specifications, with low-ash formulations required to
protect the direct injection system and turbocharger.
The lubrication system includes an oil-to-water cooler mounted at the oil filter
housing, which stabilizes oil temperature by transferring heat to the engine
coolant circuit. Piston cooling jets are integrated into the cylinder block,
providing continuous oil spray to the piston crowns under all operating
conditions.
The cooling system is a sealed, pressurized arrangement
with a belt-driven centrifugal water pump. The water pump is mounted to the
cylinder block and is driven by the accessory serpentine belt, independent of
the timing chain drive. Coolant circulates through the aluminum cylinder block
and cylinder head, with a wax-element thermostat having an opening temperature
of 90°C (194°F) regulating flow to the front-mounted radiator.
A separate electric auxiliary water pump is incorporated into the system in
certain applications to provide continued coolant circulation to the
turbocharger and heater core after engine shut-down, preventing localized
boiling in the turbocharger bearing housing. The total cooling system capacity
is 7.5 liters (7.9 qt). A 1.4-bar (20.3 psi) radiator cap maintains system
pressure. The system utilizes an organic acid technology (OAT) coolant
formulation designed for extended service intervals in aluminum-intensive
engines.
The ignition system is a coil-on-plug design, with a
dedicated ignition coil mounted directly over each spark plug. The ECM controls
ignition timing individually per cylinder, with the ability to retard timing on
a cylinder-specific basis in response to knock sensor feedback. The spark plugs
are iridium-tipped for extended service life and consistent ignition performance
under the high cylinder pressures of direct injection operation.
The engine is equipped with a BorgWarner K03 or K04
turbocharger, depending on calibration variant. The turbocharger features a
water-cooled bearing housing and an integral wastegate controlled by a pneumatic
actuator. Boost pressure is managed by the Bosch MED 17.0 ECM via a
solenoid-operated boost control valve. The charge air system incorporates an
air-to-air intercooler mounted at the front of the vehicle, reducing intake air
temperature to increase density and detonation margin.
Intake and Exhaust Systems: The intake system utilizes
a composite plastic intake manifold with integrated charge motion control valves
that create tumble flow in the combustion chamber at low engine speeds,
improving mixture formation. The exhaust manifold is integrated into the
cylinder head in a “monobloc” configuration, a design that reduces weight,
accelerates catalyst light-off during cold starts, and improves thermal
management of the turbocharger.
Engine Management: The Bosch MED 17.0 engine control unit is a 32-bit system
integrating fuel injection, ignition timing, variable valve timing, boost
pressure control, idle speed control, and on-board diagnostics. The system
employs wideband oxygen sensors (lambda sensors) before and after the catalytic
converter, enabling precise air-fuel ratio control across all operating
conditions.
Emission Control: The emission control system includes a close-coupled three-way
catalytic converter, dual heated oxygen sensors for closed-loop fuel control, a
positive crankcase ventilation (PCV) system, and an evaporative emission control
system. The direct injection system’s precise fuel metering enables rapid
catalyst light-off, reducing cold-start hydrocarbon emissions.
Overall Length: 630 mm (24.8 in)
Overall Width: 660 mm (26.0 in)
Overall Height: 680 mm (26.8 in)
Dry Weight (without ancillaries): 135 kg (298 lb)
Dry Weight (fully dressed with turbocharger, manifolds, and ancillaries): 155 kg
(342 lb)
Engine Oil Capacity (with filter change): 5.4 liters
(5.7 qt).
Engine Oil Specification: 5W-30 or 0W-30, ACEA A5/B5.
Oil Change Interval: 12,000 km (7,500 miles) or 12 months.
Coolant Capacity: 7.5 liters (7.9 qt).
Coolant Specification: Ethylene glycol-based OAT (organic acid technology)
coolant.
Coolant Change Interval: 80,000 km (50,000 miles) or 48 months.
Timing Chain: Inspect for noise and stretch at major service intervals.
Timing Chain Tensioner: Hydraulic, self-adjusting.
Valve Clearance: Hydraulic lash adjusters.
Spark Plug Type: Iridium-tipped (Volvo part number 30751868 or equivalent).
Spark Plug Gap: 0.7-0.8 mm (0.028-0.031 in).
Spark Plug Replacement Interval: 60,000 km (37,500 miles).
Fuel Filter: Integrated with fuel pump assembly.
Air Filter Replacement Interval: 45,000 km (28,000 miles) or as indicated by
restriction indicator.
Drive Belt (serpentine) Tension: Automatic spring tensioner.
Drive Belt Replacement Interval: 120,000 km (75,000 miles).
High-Pressure Fuel Pump: Inspect for leaks at filter changes.
Cylinder Head Bolts: 30 Nm (22 lb-ft)
Main Bearing Cap Bolts (bedplate to block): 40 Nm (30 lb-ft)
Connecting Rod Cap Bolts: 25 Nm (18 lb-ft)
Camshaft Cap Bolts: 12 Nm (9 lb-ft)
Camshaft Sprocket Bolts: 55 Nm (41 lb-ft)
Crankshaft Pulley Bolt: 80 Nm (59 lb-ft)
Flywheel / Flexplate Bolts: 40 Nm (30 lb-ft)
Intake Manifold Bolts: 23 Nm (17 lb-ft)
Exhaust Manifold Nuts: 25 Nm (18 lb-ft)
Turbocharger to Manifold Nuts: 40 Nm (30 lb-ft)
Fuel Rail Bolts: 23 Nm (17 lb-ft)
High-Pressure Fuel Pump Mounting Bolts: 23 Nm (17 lb-ft)
Spark Plugs: 23 Nm (17 lb-ft)
Oil Pan Bolts (aluminum pan): 12 Nm (9 lb-ft)
Water Pump Bolts: 12 Nm (9 lb-ft)
Oil Filter Housing (cartridge type): 25 Nm (18 lb-ft)
Engine Mount Brackets: 50 Nm (37 lb-ft)
Volvo S60 (second generation, 2010-2011): The B4204T6
was introduced in the second-generation S60 as the “2.0T” variant, positioned
between the 1.6-liter T3/T4 and the 3.0-liter T6. In the S60, the engine was
paired exclusively with the 6-speed Powershift dual-clutch transmission (MPS6)
and featured a sport-tuned exhaust system in certain markets.
Volvo V60 (first generation, 2010-2012): The V60 wagon received the B4204T6 as a
mid-range powertrain option, badged “2.0T.” This application emphasized the
engine’s broad torque plateau for towing and load-carrying capability.
Production continued into early 2012 before the engine was superseded by the
B4204T7 variant with revised calibration.
Volvo S80 (second generation, 2010-2011): In the S80 executive sedan, the
B4204T6 served as an entry-level turbocharged option in markets where the larger
3.0-liter and 3.2-liter engines incurred higher taxation. The S80 application
featured a refined engine mount system and additional acoustic insulation to
meet the model’s premium NVH targets.
Volvo V70 (third generation, 2010-2011): The V70 estate utilized the B4204T6 as
a replacement for the earlier 2.4-liter naturally aspirated and low-pressure
turbo engines. The engine in this application was calibrated for consistent
torque delivery under varied load conditions, with the Powershift transmission
providing smooth operation in urban and highway driving.
Volvo XC60 (first generation, 2010-2011): The B4204T6 was offered in the XC60
crossover as the “2.0T” variant, providing a fuel-efficient alternative to the
3.0-liter T6 in markets where the smaller displacement offered tax advantages.
This application included a reinforced cooling system with a larger radiator and
auxiliary transmission cooler to accommodate the increased thermal load of the
crossover’s higher curb weight and occasional towing duties.
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