Volkswagen BMP Specifications
| Engine Model: Volkswagen BMP |
| Engine Type: 4-cycle 4-cylinder SOHC 8-valve turbocharged liquid-cooled diesel |
| Total Displacement: 120.1 cu.in (1.96 L) |
| Rated Engine Power: 138 Hp (103 kW) at 4000 rpm |
| Fuel System Type: Bosch unit injectors |
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The Volkswagen BMP is a 2.0-liter inline-four
turbocharged diesel engine produced between 2005 and 2009, belonging to the
EA188 (Pump-Duse) engine family. This powerplant represents the 8-valve
iteration of Volkswagen’s 2.0 TDI range, effectively a bored-out evolution of
the 1.9 TDI engines that established Volkswagen’s reputation for diesel
durability and torque delivery. The BMP was engineered to provide a balance of
performance and reliability for mid-sized passenger cars, prioritizing robust
low-end torque and fuel efficiency over the higher-rpm refinement of the
16-valve 2.0 TDI variants such as the BKD.
The engine’s architecture adhered to the Pump-Duse (Unit Injector) fuel system
design, which integrated the injection pump and injector into a single unit for
each cylinder, eliminating the high-pressure common rail and enabling injection
pressures up to 205,000 kPa (29,700 psi). The SOHC valvetrain operated eight
valves - two per cylinder - through a timing belt drive, with the camshaft also
actuating the unit injectors through dedicated lobes.
The BMP incorporated a variable-geometry turbocharger (VGT) providing responsive
boost across the engine speed range and was equipped with a diesel particulate
filter (DPF) for Euro 4 emissions compliance. This engine served as the
mid-range diesel powertrain for the Volkswagen Passat B6 and Skoda Superb,
delivering 103 kW (140 PS) and 320 Nm (236 lb-ft) of torque.
The BMP is a four-stroke, water-cooled, turbocharged diesel engine configured
for transverse mounting in front-wheel-drive vehicle architectures. The engine
utilizes Pump-Duse unit injector technology and a variable-geometry
turbocharger.
Engine Type: Inline-4, 4-cycle, water-cooled, turbocharged diesel
Displacement: 1,968 cc (120.1 cu.in)
Bore: 81.0 mm (3.19 in)
Stroke: 95.5 mm (3.76 in)
Compression Ratio: 18.5:1
Firing Order: 1-3-4-2
Valvetrain: SOHC, 8-valve (2 valves per cylinder)
Maximum Power: 103 kW (138 hp) at 4,000 rpm
Maximum Torque: 320 Nm (236 lb-ft) at 1,800-2,500 rpm
Redline: 4,800 rpm
Emission Standard: Euro 4 with diesel particulate filter (DPF)
Engine Management: Bosch EDC16 or EDC17 ECU
The cylinder block is manufactured from gray cast iron
using a high-pressure die-casting process, selected for its durability and
resistance to distortion under the elevated cylinder pressures generated by
Pump-Duse injection. The block features a deep-skirt design extending below the
crankshaft centerline, providing a rigid foundation for the rotating assembly.
The cylinder bores are machined directly into the iron casting with a honed
surface finish optimized for the cast iron piston ring packs. The block
incorporates a siamesed bore configuration where adjacent cylinders share common
walls, reducing overall engine length and increasing structural rigidity. Water
jackets surround each cylinder bore, with coolant flow directed from the water
pump into the block before rising into the cylinder head.
The crankcase incorporates five main bearing supports with the bearing webs
integrated into the block casting. Main bearing caps are manufactured from cast
iron and secured with two bolts per cap. A critical component within the block
is the oil pump drive assembly, which utilizes a hexagonal drive shaft
connecting the balancer shaft assembly to the oil pump. This hexagonal shaft is
a known wear point, and its failure results in sudden oil pressure loss. The
block includes mounting provisions for the tandem pump - a combined vacuum and
fuel supply pump - mounted on the cylinder head.
Block Material: Gray cast iron
Bore Diameter: 81.0 mm (3.19 in)
Cylinder Configuration: Inline, siamesed bores
Main Bearing Quantity: 5
Main Bearing Cap Design: Cast iron, two-bolt attachment
Balance Shafts: Dual counter-rotating balance shafts in the oil pump assembly
Oil Pump Drive: Hexagonal shaft connecting balance shaft module to oil pump
The cylinder head is constructed from aluminum alloy
using a permanent mold casting process, selected for its thermal conductivity
and reduced mass. The cross-flow port configuration places intake ports on one
side and exhaust ports on the opposite side. The SOHC valvetrain operates eight
valves - two per cylinder - via roller-type cam followers that incorporate
hydraulic lash adjusters.
A distinguishing feature of the Pump-Duse cylinder head is the integration of
the unit injectors. The camshaft includes four additional lobes - one per
cylinder - that actuate the unit injectors through dedicated rocker arms. This
configuration places significant load on the camshaft lobes, which are narrower
than those in conventional valvetrains. The camshaft is supported in bearing
journals machined directly into the cylinder head casting, with bearing caps of
identical construction. The combustion chambers are of a swirl-type design with
the unit injector nozzle positioned centrally to deliver fuel into the
pre-chamber region.
The cylinder head incorporates pressed-in valve seat inserts, with exhaust seats
manufactured from a nickel-based alloy to withstand elevated temperatures. Valve
guides are pressed into the head. The intake ports are designed to generate
swirl within the combustion chamber, improving air-fuel mixing and combustion
efficiency. The exhaust manifold is integrated into the cylinder head casting in
some variants, reducing weight and improving thermal management for faster
catalyst light-off.
Head Material: Aluminum alloy
Valve Configuration: SOHC, 8-valve (2 valves per cylinder)
Intake Valve Diameter: 32.0 mm (1.26 in)
Exhaust Valve Diameter: 30.0 mm (1.18 in)
Valve Stem Diameter: 6.0 mm (0.24 in)
Valve Seat Angle: 45 degrees
Camshaft Drive: Timing belt with automatic tensioner
Hydraulic Lash Adjusters: Yes, integrated into roller cam followers
Unit Injector Actuation: Camshaft-driven via dedicated rocker arms
Interference Engine: Yes - valve-to-piston contact occurs if timing belt fails
The fuel system employs Bosch Pump-Duse (Unit Injector)
technology, integrating the high-pressure pump and injector into a single unit
for each cylinder. Each unit injector is installed directly in the cylinder head
and is actuated mechanically by the camshaft through a dedicated rocker arm.
This configuration eliminates the high-pressure common rail and external
injection pump lines found in conventional diesel systems.
A tandem pump - a combined fuel supply and vacuum pump - is mounted on the
cylinder head and driven by the camshaft. The fuel supply section of the tandem
pump draws fuel from the tank through a water-separating primary filter and
delivers it to the unit injectors at low pressure. The unit injectors then
generate injection pressures up to 205,000 kPa (29,700 psi) using a plunger
driven by the camshaft rocker arm.
The engine control unit governs injection timing and quantity through solenoid
valves integrated into each unit injector. The ECU selects injection timing
based on inputs from the crankshaft position sensor, camshaft position sensor,
boost pressure sensor, coolant temperature sensor, and fuel temperature sensor.
The system is capable of multiple injection events per combustion cycle -
pre-injection, main injection, and post-injection - to reduce combustion noise
and manage diesel particulate filter regeneration.
Injection Type: Pump-Duse (Unit Injector), mechanically actuated, electronically
controlled
Maximum Injection Pressure: 205,000 kPa (29,700 psi)
Unit Injector Actuation: Camshaft-driven rocker arms
Tandem Pump: Combined fuel supply and vacuum pump
Fuel Filtration: Primary water-separating filter plus secondary filter
Fuel Requirement: Diesel fuel meeting EN 590 specification; minimum cetane 51
The lubrication system is a fully pressurized, wet-sump
design with a gear-type oil pump mounted within the balance shaft module and
driven by the crankshaft through a hexagonal drive shaft. The oil pump utilizes
a pair of meshing gears to generate flow with positive displacement
characteristics.
Oil is drawn from the 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. 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, unit injector rocker
arms, balance shafts, and turbocharger bearings.
A critical aspect of the BMP lubrication system is the hexagonal drive shaft
connecting the balance shaft module to the oil pump. This component is subject
to wear over extended service intervals, and its failure results in complete
loss of oil pressure. The lubrication system incorporates an oil pressure switch
that illuminates a warning indicator if pressure falls below the specified
minimum. The engine is equipped with a water-to-oil heat exchanger mounted on
the oil filter housing.
Oil Type: Fully synthetic low-ash oil meeting VW 507.00; SAE 5W-30 or 5W-40
Oil Capacity (with filter): 4.3 L (4.5 US qt)
Oil Pressure (at idle, warm): 100-150 kPa (15-22 psi)
Oil Pressure (at 3,000 rpm): 350-450 kPa (51-65 psi)
Oil Pump Type: Gear-type, driven by hexagonal shaft from balance shaft module
Oil Cooler: Water-to-oil heat exchanger integrated with oil filter housing
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, radiator, oil cooler,
and exhaust gas recirculation (EGR) cooler.
A wax-pellet thermostat mounted in a housing on the cylinder head outlet or
water pump inlet 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. Rapid
engine warm-up is essential for diesel particulate filter regeneration, which
requires elevated exhaust temperatures.
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 a separate expansion tank with a pressure-rated cap.
Coolant Type: Ethylene-glycol based antifreeze
Coolant Capacity: 7.0-8.0 L (7.4-8.5 US qt)
Thermostat Opening Temperature: 87 °C (189 °F)
Thermostat Full Opening Temperature: 102 °C (216 °F)
Radiator Cap Pressure: 110-140 kPa (16-20 psi)
Water Pump Type: Centrifugal, belt-driven
| Intake and Exhaust Systems |
Intake System: The intake system incorporates a
paper-element air cleaner with an integrated restriction indicator. Filtered air
enters the variable-geometry turbocharger compressor. The VGT system uses
movable vanes in the turbine housing to vary exhaust flow velocity, providing
responsive boost across the engine speed range. Compressed air passes through an
air-to-air intercooler before entering the intake manifold. The intake manifold
is a composite plastic or aluminum design with integrated swirl flaps that
create intake air motion for improved combustion at low loads.
Exhaust System: The exhaust manifold is integrated into the cylinder head on
many variants, reducing weight and improving thermal efficiency. The
variable-geometry turbocharger is mounted directly to the cylinder head. The
exhaust system incorporates a diesel oxidation catalyst (DOC) and a diesel
particulate filter (DPF) for Euro 4 emissions compliance. The DPF requires
periodic active regeneration, during which the engine control unit injects
additional fuel through post-injection cycles to raise exhaust temperatures and
oxidize accumulated soot.
Turbocharger: Variable-geometry turbocharger (VGT/VNT)
with electronic actuator. The movable vanes adjust the aspect ratio of the
turbine inlet, optimizing boost response across the engine speed range. Maximum
boost pressure: 180-220 kPa (26-32 psi).
Exhaust Gas Recirculation (EGR): The EGR system recirculates a portion of
exhaust gas to the intake manifold to reduce combustion temperatures and
nitrogen oxide formation. The system includes a water-cooled EGR cooler and an
electronically controlled EGR valve.
Timing Drive: The engine utilizes a rubber timing belt with internal fabric
reinforcement to drive the camshaft from the crankshaft sprocket. The belt also
drives the water pump. An automatic tensioner pulley maintains belt tension. The
BMP is an interference engine; timing belt failure results in piston-to-valve
contact causing significant engine damage.
Overall Length: 630 mm (24.8 in)
Overall Width: 620 mm (24.4 in)
Overall Height: 710 mm (28.0 in)
Dry Weight (complete engine): 155 kg (342 lb)
Engine Oil Change: 15,000 km (9,300 mi) or 1 year; VW
507.00 oil mandatory.
Engine Oil Filter Change: At every oil change.
Timing Belt Replacement: 120,000 km (75,000 mi) or 5 years.
Timing Belt Tensioner Inspection: Replace with timing belt.
Fuel Filter Replacement: 30,000 km (18,600 mi) or 2 years.
Air Filter Replacement: 60,000 km (37,000 mi) or as indicated.
Coolant Replacement: 120,000 km (75,000 mi) or 5 years.
Drive Belt (Accessory) Inspection: Every 15,000 km (9,300 mi).
Diesel Particulate Filter: No scheduled replacement; regeneration required if
clogged.
Valve Clearance Adjustment: Not required due to hydraulic lash adjusters.
Oil Pump Drive Shaft Inspection: Recommended at 120,000 km (75,000 mi).
Cylinder Head Bolts (M10 x 1.25), 1st pass: 40 Nm (30
lb-ft)
Cylinder Head Bolts (M10 x 1.25), 2nd pass: 80 Nm (59 lb-ft)
Main Bearing Cap Bolts (M10 x 1.25): 30 Nm (22 lb-ft)
Connecting Rod Cap Bolts (M8 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 (M8 x 1.25): 20-25 Nm (15-18 lb-ft)
Exhaust Manifold Nuts (M8 x 1.25): 25-30 Nm (18-22 lb-ft)
Unit Injector Clamp Bolts (M6 x 1.0): 10-12 Nm (89-106 lb-in)
Turbocharger Mounting Nuts (M10 x 1.25): 45-50 Nm (33-37 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 Belt Tensioner Bolt (M10 x 1.25): 25-30 Nm (18-22 lb-ft)
Crankshaft Pulley Bolt (M18 x 1.5): 80 Nm (59 lb-ft)
Flywheel / Drive Plate Bolts (M10 x 1.25): 30 Nm (22 lb-ft)
The Volkswagen BMP engine was deployed across the
Volkswagen Group’s mid-sized passenger car platforms, primarily in the
Volkswagen Passat and Skoda Superb ranges.
Volkswagen Passat B6 (3C): 2005-2009 model years. The BMP was offered in the
Passat B6 as the 2.0 TDI 8-valve powertrain option, positioned alongside the
16-valve BKD and later common-rail variants. The engine was available in sedan
and estate (Variant) body styles, paired with six-speed manual or six-speed
automatic (DSG) transmissions. Passat applications featured the BMP calibrated
for 103 kW (140 PS) and 320 Nm (236 lb-ft).
Skoda Superb I (3U): 2005-2008 model years. The BMP was offered in the
first-generation Superb facelift models as the 2.0 TDI 8-valve powertrain,
replacing earlier 1.9 TDI options. The Superb I application utilized the same
calibration as the Passat, with the engine paired with six-speed manual or
automatic transmissions in front-wheel-drive configurations.
Skoda Superb II (3T): 2008-2009 model years. The BMP continued in early
production of the second-generation Superb before being superseded by
common-rail 2.0 TDI engines. The Superb II application featured the same 103 kW
(140 PS) output with a diesel particulate filter for Euro 4 compliance. The
engine was available in both sedan and estate body styles.
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