Volvo B5244T3 Specifications
| Engine Model: Volvo B5244T3 |
| Engine Type: 4-cycle 5-cylinder DOHC 20-valve turbocharged liquid-cooled gasoline |
| Total Displacement: 148.6 cu.in (2.43 L) |
| Rated Engine Power: 197 hp (147 kW) at 6000 rpm |
| Fuel System Type: Multi-point fuel injection |
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The Volvo B5244T3 is a 2.4-liter light-pressure
turbocharged (LPT) inline-five cylinder engine belonging to the second
generation of Volvo’s modular Whiteblock family. Introduced in the early 2000s
alongside the P2 platform vehicles, this powerplant was engineered to deliver a
fundamentally different character than its high-boost T5 counterparts. Rather
than emphasizing peak power at elevated engine speeds, the B5244T3 was optimized
to produce a broad, flat torque curve beginning just above idle, providing
effortless acceleration for daily driving, highway cruising, and towing
applications.
The engine achieved this through a higher compression ratio combined with a
smaller Mitsubishi TD04HL-13T turbocharger, resulting in responsive off-boost
behavior and a linear power delivery that belied its forced induction
configuration. Variable Valve Timing (VVT) on the exhaust camshaft further
refined the torque characteristic, while the Bosch Motronic ME7 engine
management system introduced electronic throttle control for precise drivability
and integrated safety functions.
The engine operates as a four-stroke, light-pressure turbocharged,
spark-ignition unit. Its inline-five cylinder configuration provides inherent
balance characteristics that contribute to the engine’s renowned smoothness.
Engine Type: Inline 5-cylinder, DOHC (Double Overhead Camshaft), 20 valves.
Valvetrain: Belt-driven dual overhead camshafts with VVT on the exhaust
camshaft.
Displacement: 2435 cc (148.6 cu.in).
Bore: 83.0 mm (3.27 in).
Stroke: 90.0 mm (3.54 in).
Compression Ratio: 9.0:1.
Firing Order: 1-2-4-5-3.
Fuel System: Sequential multi-point electronic fuel injection.
Turbocharger: Mitsubishi TD04HL-13T with integral wastegate.
Maximum Power: 197 hp (147 kW) at 6000 rpm.
Maximum Torque: 285 Nm (210 lb-ft) from 1800 to 5000 rpm.
Boost Pressure: 0.4-0.5 bar (6-7 psi).
Maximum Engine Speed: 6500 rpm (governed).
Idle Speed: 750 ± 50 rpm.
Emission Standard: Euro 3 (later variants achieved Euro 4 compliance).
The cylinder block is constructed from cast aluminum
alloy with pressed-in cast iron cylinder liners, following the modular
Whiteblock design philosophy. The 83.0 mm bore diameter, combined with the 90.0
mm stroke, results in an under-square configuration that emphasizes torque
production at lower engine speeds. The cylinder walls in the 2.4-liter block are
marginally thinner than those found in the 2.3-liter B5234T, reflecting the
design’s focus on light-pressure boost rather than extreme high-output
applications.
The block incorporates a deep-skirt design extending below the crankshaft
centerline, with a cast aluminum ladder frame serving as a structural lower
reinforcement and main bearing cap retainer. Five main bearings support the
crankshaft, with the ladder frame secured by through-bolts that enhance overall
assembly rigidity. An integrated oil cooler, utilizing engine coolant, is
mounted adjacent to the oil filter housing.
The cylinder head is manufactured from cast aluminum
alloy and follows a cross-flow design optimized for the transverse
front-wheel-drive and all-wheel-drive layouts of the P2 platform. The DOHC
arrangement operates twenty valves via hydraulic lash adjusters, eliminating the
need for periodic valve clearance adjustments. The exhaust camshaft is equipped
with a Variable Valve Timing (VVT) mechanism, which hydraulically adjusts
camshaft phasing to optimize exhaust gas scavenging, reduce turbocharger lag,
and broaden the torque plateau.
Valve Arrangement: 20 valves; DOHC with hydraulic lash adjusters.
Intake Valve Diameter: 32.0 mm (1.26 in).
Exhaust Valve Diameter: 29.0 mm (1.14 in).
Valve Stem Diameter: 6.0 mm (0.24 in).
Valve Seat Angle: Intake 45°, Exhaust 45°.
VVT Mechanism: Hydraulically actuated exhaust camshaft phaser controlled by an
electronically operated oil control valve (OCV) solenoid. The cylinder head
features intake ports designed to promote swirl and tumble motion for efficient
combustion at low engine speeds, complementing the light-pressure turbocharger’s
characteristics. The combustion chamber design incorporates centralized spark
plug placement and optimized squish areas to enhance flame propagation under
both naturally aspirated and boosted conditions.
The engine employs the Bosch Motronic ME7 integrated
engine management system, which combines sequential multi-point fuel injection,
fully mapped ignition timing, electronic throttle control, and boost pressure
regulation within a single ECU. This system represented a significant
advancement over earlier Motronic versions, incorporating torque-based engine
management that interprets driver input through the accelerator pedal position
sensor and calculates required throttle angle, fuel delivery, and ignition
timing to achieve the requested torque output.
System Type: Bosch Motronic ME7 integrated engine management.
Fuel Pressure: 3.8-4.2 bar (55-61 psi).
Injector Flow Rate: 315-350 cc/min at operating pressure.
Throttle Body: Electronic throttle control (drive-by-wire) with no mechanical
cable connection.
Air Flow Measurement: Hot-film mass air flow (MAF) sensor with integrated intake
air temperature sensor. The returnless fuel system incorporates a fuel pressure
regulator within the fuel tank module, reducing evaporative emissions. The ME7
ECU manages fuel delivery, ignition timing, boost pressure via the turbocharger
control valve, idle speed stabilization, cruise control, and electronic throttle
functions.
The lubrication system is a full-pressure, wet-sump
design engineered to support the VVT mechanism and turbocharger oil supply
requirements. A gear-type oil pump, driven directly by the crankshaft, draws
lubricant from a stamped steel oil pan and circulates it through a full-flow oil
filter. The integrated oil cooler, utilizing engine coolant, maintains stable
oil temperatures under sustained load conditions.
Engine Oil Capacity with Filter: 5.8 L (6.1 qt).
Engine Oil Capacity without Filter: 5.2 L (5.5 qt).
Recommended Oil Grade: SAE 5W-30 or 5W-40 meeting Volvo specification VCC
95200356 (ACEA A3/B3 or A3/B4).
Oil Pressure at Operating Speed: 3.0-4.5 bar (44-65 psi) at 3000 rpm.
Oil Pump Type: Crescent-type gear pump with integrated pressure relief valve.
The oil pan incorporates a windage tray to separate oil from the rotating
assembly, reducing parasitic losses. The VVT phaser and oil control valve rely
on consistent oil pressure and cleanliness, making adherence to oil change
intervals and the use of specified lubricants critical for system longevity. The
turbocharger receives pressurized oil from the main gallery via a dedicated feed
line with a restricted orifice.
The cooling system is a pressurized, sealed circuit
utilizing a high-capacity cross-flow radiator and a belt-driven centrifugal
water pump. The water pump is mounted on the cylinder block and driven by the
timing belt, requiring replacement during timing belt service intervals. A
wax-type thermostat regulates coolant flow to maintain optimal operating
temperatures.
Coolant Capacity (Total System): 8.5 L (9.0 qt).
Thermostat Opening Temperature: 87°C (189°F).
Radiator Cap Pressure Rating: 1.2 bar (17.4 psi).
Recommended Coolant: Ethylene glycol-based antifreeze with Organic Acid
Technology (OAT), meeting Volvo specification. Coolant flow is directed through
the cylinder block, cylinder head, turbocharger center housing, and integrated
oil cooler. The turbocharger incorporates both coolant feed and return lines for
water-cooled bearing housing operation, reducing heat soak and preventing oil
coking after engine shutdown.
A stainless steel exhaust manifold with equal-length
runners directs exhaust gases to the turbocharger turbine housing. A catalytic
converter is positioned immediately downstream of the turbocharger for rapid
light-off during cold starts. Two heated oxygen sensors - a front wideband
sensor for precise air-fuel ratio control and a rear sensor for catalyst
monitoring - provide feedback to the ME7 ECU.
The Bosch Motronic ME7 system controls a
distributorless ignition configuration with individual coil-on-plug (COP)
assemblies mounted directly over each spark plug. The ECU calculates ignition
timing based on engine load, crankshaft position, knock sensor feedback, intake
air temperature, and coolant temperature. A piezoelectric knock sensor mounted
on the cylinder block enables individual cylinder ignition retardation under
detonation conditions. Spark Plug Type: Platinum-tipped long-life plug (e.g.,
NGK PFR7E-10 or equivalent). Spark Plug Gap: 0.70-0.80 mm (0.028-0.031 in).
The Mitsubishi TD04HL-13T turbocharger features a
smaller turbine housing compared to the T5’s 15G or 16T variants, prioritizing
rapid spooling and low-end response over peak flow capacity. A pneumatic
wastegate actuator controls boost pressure, with a solenoid valve enabling the
ME7 ECU to modulate wastegate operation for precise boost regulation. A bypass
valve (recirculation valve) prevents compressor surge during throttle closure.
Timing Drive: The camshafts are driven by a reinforced
rubber timing belt with internal teeth. The belt drives both camshaft sprockets
and the water pump. An automatic spring-loaded tensioner with a hydraulic damper
maintains correct belt tension throughout the engine’s operating life. The
engine is an interference design; timing belt failure results in contact between
valves and pistons, causing extensive internal damage. Timing Belt Replacement
Interval: 168,000 km (105,000 mi) or 10 years per factory specification; shorter
intervals recommended by specialists.
Variable Valve Timing System: The exhaust camshaft VVT system consists of a
hydraulic phaser mounted at the end of the exhaust camshaft, controlled by an
oil control valve (OCV) solenoid. The ME7 ECU modulates oil pressure to the
phaser based on engine speed, load, temperature, and transmission gear
selection, optimizing exhaust valve timing to reduce turbocharger lag and
improve low-end torque.
Positive Crankcase Ventilation (PCV) System: The engine utilizes a closed-type
PCV system with an external oil trap (separator) mounted on the cylinder block.
Crankcase gases are drawn through the separator to remove oil mist before being
reintroduced into the intake system upstream of the turbocharger compressor.
This system requires periodic inspection and cleaning to prevent blockage, which
can lead to elevated crankcase pressure and subsequent seal failure.
Overall Length (Accessory Drive to Flywheel): 710 mm
(28.0 in).
Overall Width (Intake Manifold to Exhaust Manifold): 620 mm (24.4 in).
Overall Height: 680 mm (26.8 in).
Weight (Dry, Complete with Manifolds, Turbocharger, and Flywheel): 162 kg (357
lb).
Oil Change Interval: 12,000 km (7,500 mi) or 12 months
using synthetic oil meeting Volvo specification. Timing Belt Replacement
Interval: 168,000 km (105,000 mi) or 10 years. Replacement of tensioner, idler
pulleys, and water pump recommended concurrently. Many service providers
recommend a 112,000 km (70,000 mi) interval for safety. Coolant Replacement
Interval: 5 years or 100,000 km (62,000 mi) for initial fill, followed by 3-year
intervals.
Spark Plug Replacement Interval: 80,000 km (50,000 mi) for platinum-tipped
original equipment plugs. Air Filter Replacement: 40,000 km (25,000 mi) under
normal conditions. PCV System Inspection: Every 80,000 km (50,000 mi); cleaning
or replacement of oil trap and associated hoses recommended if pressure test
indicates blockage. Fuel Filter Replacement: 80,000 km (50,000 mi).
Accessory Drive Belt Inspection: Every 20,000 km (12,500 mi); replacement
indicated by visible cracking, glazing, or tension loss. VVT Solenoid/Oil
Control Valve: Inspection for oil leakage and operational noise at each service
interval. Turbocharger Care: Engine idle cool-down period of 30-60 seconds
recommended after sustained high-load operation to prevent oil coking in the
bearing housing.
Cylinder Head Bolts (Stage 1): 20 Nm (15 lb-ft).
Cylinder Head Bolts (Stage 2): 70 Nm (52 lb-ft).
Main Bearing Ladder Frame Bolts (Stage 1): 20 Nm (15 lb-ft).
Main Bearing Ladder Frame Bolts (Stage 2): 30 Nm (22 lb-ft).
Connecting Rod Cap Nuts (Stage 1): 20 Nm (15 lb-ft).
Connecting Rod Cap Nuts (Stage 2): 40 Nm (30 lb-ft).
Camshaft Bearing Cap Bolts: 12 Nm (9 lb-ft).
Timing Belt Tensioner Bolt: 20 Nm (15 lb-ft).
VVT Phaser Center Bolt: 100 Nm (74 lb-ft).
Spark Plugs: 25 Nm (18 lb-ft).
Flywheel/Flexplate Bolts: 70 Nm (52 lb-ft).
Intake Manifold Bolts: 20 Nm (15 lb-ft).
Exhaust Manifold Nuts: 35 Nm (26 lb-ft).
Turbocharger to Exhaust Manifold Nuts: 40 Nm (30 lb-ft).
Turbocharger Oil Feed Line: 35 Nm (26 lb-ft).
Water Pump Bolts: 10 Nm (7 lb-ft).
Oil Filter: 15 Nm (11 lb-ft).
PCV Oil Trap Mounting Bolts: 10 Nm (7 lb-ft).
VVT Solenoid Retaining Bolt: 10 Nm (7 lb-ft).
The Volvo B5244T3 was produced from 2000 through 2003,
serving as the 2.4T powertrain across Volvo’s P2 platform vehicle range,
encompassing front-wheel-drive and all-wheel-drive configurations.
Volvo V70 2.4T (2000-2003): The estate (wagon) variant, offered with front-wheel
drive as a mid-range performance alternative to the naturally aspirated and T5
models.
Volvo V70 AWD (2000-2003): The all-wheel-drive version of the V70, utilizing the
B5244T3 with a Haldex coupling-based AWD system.
Volvo V70 XC / XC70 (2000-2002): The cross-country raised-chassis variant,
equipped with the B5244T3 as the standard gasoline engine before the
introduction of the 2.5-liter successor.
Volvo S60 2.4T (2001-2003): The sedan variant, positioned between the naturally
aspirated models and the high-boost S60 T5.
Volvo S80 2.4T (2000-2003): The flagship sedan, utilizing the B5244T3 as a
mid-range powertrain offering smooth, refined performance.
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