Volkswagen CBBB Specifications
| Engine Model: Volkswagen CBBB |
| Engine Type: 4-cycle 4-cylinder DOHC 16-valve turbocharged liquid-cooled diesel |
| Total Displacement: 120.1 cu.in (1.96 L) |
| Rated Engine Power: 168 Hp (125 kW) at 4200 rpm |
| Fuel System Type: Common rail direct injection |
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The Volkswagen CBBB is a 2.0-liter, inline 4-cylinder
turbocharged diesel engine from the EA189 family, produced between 2008 and
2012. Positioned as the high-output variant within the 2.0 TDI range, the CBBB
delivered 170 PS and 350 Nm of torque, establishing it as the performance diesel
choice for Volkswagen’s Golf Mk6 GTD, Passat CC, and a range of Audi, Skoda, and
Seat models. This engine represented a significant evolution from the preceding
unit injector (PD) technology, adopting a common rail direct injection system
with piezoelectric injectors operating at pressures up to 1,800 bar.
The common rail architecture enabled multiple injection events per combustion
cycle, reducing combustion noise, improving cold-start behavior, and achieving
Euro 5 emission compliance with a diesel particulate filter (DPF). The engine
retains the EA189 family’s cast iron cylinder block and aluminum cylinder head,
with a bore and stroke of 81.0 mm x 95.5 mm - an undersquare configuration
favoring low-end torque production.
A variable-geometry turbocharger (VGT), generally a BorgWarner BV43, provides
responsive boost across the engine speed range. While the CBBB earned acclaim
for its refined operation and strong mid-range pull, it also became associated
with specific service considerations, including the long-term reliability of the
piezoelectric injectors, intake manifold flap mechanisms, and the oil pump drive
system.
Engine Code: CBBB
Engine Family: Volkswagen EA189 (2.0 TDI Common Rail)
Configuration: Inline 4-cylinder
Valvetrain: DOHC, 16 valves (4 per cylinder), belt-driven
Displacement: 1968 cc (120.1 cu.in)
Bore: 81.0 mm (3.19 in)
Stroke: 95.5 mm (3.76 in)
Compression Ratio: 16.5:1
Firing Order: 1-3-4-2
Fuel System: Common Rail Direct Injection, piezoelectric injectors
Fuel Injection Pressure: Up to 1800 bar (26,100 psi)
Aspiration: Turbocharged and air-to-air intercooler
Maximum Power: 125 kW (170 PS; 168 hp) at 4200 rpm
Maximum Torque: 350 Nm (258 lb-ft) from 1750 to 2500 rpm
Maximum Engine Speed: 5000 rpm (fuel cut-off)
Emission Standard: Euro 5 with Diesel Particulate Filter (DPF)
The cylinder block is constructed from cast iron, a
material choice that provides the structural rigidity and thermal stability
required for the high cylinder pressures generated by common rail diesel
combustion. The block is a deep-skirt, closed-deck design, with the cylinder
bores machined directly into the cast iron without removable liners. This
configuration maximizes bore rigidity under peak cylinder pressures exceeding
160 bar.
The crankshaft is manufactured from forged steel and is supported by five main
bearings, with bearing cap reinforcements integrated into the lower crankcase
structure. The connecting rods are forged steel with fracture-split caps,
ensuring precise bearing bore geometry. The pistons are aluminum alloy with a
reinforced top ring land and a combustion bowl that optimizes mixture formation
from the centrally located piezoelectric injectors.
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-load operation. An oil pump drive system uses
a hexagon drive shaft (hex pole) connecting the balance shaft module to the oil
pump; early production units prior to 2010 are subject to inspection for wear on
this component.
The cylinder head is manufactured from aluminum alloy
and houses a Double Overhead Camshaft (DOHC) arrangement with four valves per
cylinder. The camshafts are driven by a toothed timing belt from the crankshaft
sprocket, with a spring-loaded automatic tensioner maintaining belt tension. The
intake camshaft is equipped with a continuously variable valve timing mechanism,
allowing the Engine Control Module (ECM) to adjust intake valve timing to
optimize volumetric efficiency and reduce internal exhaust gas recirculation
requirements.
The valvetrain employs roller finger followers with hydraulic lash adjusters,
eliminating the need for periodic valve clearance adjustments. The valves are
arranged in a compact pent-roof combustion chamber, with the piezoelectric
injector mounted centrally to deliver fuel directly into the piston bowl.
The intake valves measure 31.0 mm (1.22 in) in
diameter, while the exhaust valves measure 27.0 mm (1.06 in) and are
manufactured from high-temperature nickel-based alloy. The cylinder head
incorporates integrated exhaust gas recirculation (EGR) passages and is
drilled with dedicated cooling channels to manage thermal loads around
the injector seats and valve bridges.
The fuel system employs a common rail direct injection
architecture with piezoelectric injectors. A high-pressure fuel pump - a Bosch
CP4H or CP4.1 radial piston pump - mounted to the cylinder head draws fuel from
the tank via an electric lift pump and generates pressures up to 1800 bar
(26,100 psi) in the fuel rail. The fuel rail distributes pressurized fuel to
four piezoelectric injectors, each mounted centrally in the cylinder head.
Piezoelectric technology enables injector response times significantly faster
than solenoid injectors, allowing up to five injection events per combustion
cycle. These events include pre-injection for combustion noise reduction, main
injection for power delivery, and post-injection for diesel particulate filter
(DPF) regeneration.
The Bosch EDC17 engine management system controls injection timing, injection
duration, and rail pressure based on inputs from the crankshaft position sensor,
camshaft position sensor, high-pressure fuel sensor, mass airflow sensor, and
wideband oxygen sensor. A fuel cooler is integrated into the system to stabilize
fuel temperature returning from the injector leak-off circuit.
The lubrication system is a pressurized, full-flow
wet-sump design utilizing a rotor-type oil pump driven by the balance shaft
module. A hexagon drive shaft transmits rotational force from the balance shaft
to the oil pump; this component has known service considerations on early
production engines. The oil pump draws fluid from a pressed-steel or aluminum
oil pan, with a total system capacity of 4.3 liters (4.5 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 must meet VW 507.00 specification - a low-ash (Low-SAPS)
formulation designed to protect the diesel particulate filter (DPF) and the
exhaust aftertreatment system. Recommended viscosities are 5W-30 and 0W-30. An
oil-to-water cooler is integrated at the oil filter housing, stabilizing 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.
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 same timing belt that actuates the
camshafts, requiring water pump replacement to coincide with timing belt service
intervals. Coolant circulates through the cast iron cylinder block and aluminum
cylinder head, with a wax-element thermostat having an opening temperature of
87°C (189°F) regulating flow to the front-mounted radiator.
A separate electric auxiliary water pump is incorporated to provide continued
coolant circulation to the turbocharger and EGR cooler after engine shut-down.
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.
The intake system incorporates a composite plastic
intake manifold with integrated swirl flaps that create tumble flow in the
combustion chamber at low engine speeds, improving mixture formation. The swirl
flap mechanism is actuated by an electric motor; the linkage arm is subject to
wear and can generate fault code P2015, indicating position correlation errors.
The engine is equipped with a BorgWarner BV43
variable-geometry turbocharger (VGT). The VGT mechanism alters the angle of the
turbine vanes to optimize exhaust gas flow across the turbine wheel. At low
engine speeds, the vanes close to increase exhaust velocity, rapidly building
boost pressure.
At higher speeds, the vanes open to reduce
backpressure and maintain efficiency. Boost pressure is managed by the
ECM via a solenoid-actuated vacuum control system. An air-to-air
intercooler mounted at the front of the vehicle reduces intake air
temperature after compression.
Exhaust Aftertreatment: The exhaust system incorporates
a close-coupled diesel oxidation catalyst (DOC) and a diesel particulate filter
(DPF) housed in a single canister. The DOC oxidizes hydrocarbons and carbon
monoxide, while the DPF captures soot. Passive regeneration occurs during normal
high-load operation; active regeneration is initiated by the ECM, involving
post-injection of fuel to raise exhaust temperatures and burn off accumulated
soot. An exhaust gas recirculation (EGR) system with a cooled EGR circuit
reduces nitrogen oxide (NOx) emissions by recirculating a portion of exhaust gas
into the intake manifold.
Engine Management: The Bosch EDC17 engine control unit is a 32-bit system
integrating fuel injection, variable-geometry turbocharger control, exhaust gas
recirculation, swirl flap actuation, DPF regeneration management, and on-board
diagnostics. The system employs multiple wideband oxygen sensors and pressure
sensors throughout the intake and exhaust tracts for precise closed-loop
control.
Overall Length: 660 mm (26.0 in).
Overall Width: 620 mm (24.4 in).
Overall Height: 680 mm (26.8 in).
Dry Weight (without ancillaries): 145 kg (320 lb).
Dry Weight (fully dressed with turbocharger, manifolds, and ancillaries): 170 kg
(375 lb).
Engine Oil Capacity (with filter change): 4.3 liters
(4.5 qt).
Engine Oil Specification: VW 507.00 (Low-SAPS 5W-30 or 0W-30).
Oil Change Interval: 15,000 km (9,300 miles) or 12 months.
Coolant Capacity: 7.5 liters (7.9 qt).
Coolant Specification: OAT (organic acid technology) coolant.
Coolant Change Interval: 80,000 km (50,000 miles) or 48 months.
Timing Belt Replacement Interval: 210,000 km (130,000 miles) per manufacturer.
Timing Belt Replacement Interval: 120,000 km (75,000 miles) specialist
recommendation.
Timing Belt Tensioner: Automatic spring-loaded - replace with timing belt.
Water Pump Replacement Interval: Replace concurrently with timing belt.
Valve Clearance: Hydraulic lash adjusters - no adjustment required.
Fuel Filter Replacement Interval: 30,000 km (18,750 miles) or 24 months.
Air Filter Replacement Interval: 45,000 km (28,000 miles) or as indicated by
restriction indicator.
Drive Belt (serpentine) Tension: Automatic spring tensioner - no adjustment
required.
Drive Belt Replacement Interval: 120,000 km (75,000 miles).
Diesel Particulate Filter (DPF) Regeneration: Automatic - no user intervention
required.
Cylinder Head Bolts: 40 Nm (30 lb-ft)
Main Bearing Cap Bolts: 50 Nm (37 lb-ft)
Connecting Rod Cap Bolts: 30 Nm (22 lb-ft)
Camshaft Cap Bolts: 12 Nm (9 lb-ft)
Camshaft Sprocket Bolts: 55 Nm (41 lb-ft)
Crankshaft Pulley Bolt: 150 Nm (111 lb-ft)
Flywheel / Flexplate Bolts: 60 Nm (44 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)
Piezoelectric Injector Clamp Bolts: 10 Nm (7 lb-ft)
Glow Plugs: 15 Nm (11 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)
Volkswagen Golf Mk6 GTD (Typ 5K, 2009-2012): The CBBB
engine served as the powerplant for the Golf GTD, a performance diesel variant
positioned between the standard Golf and the Golf R. In this application, the
engine was paired with a 6-speed manual transmission or a 6-speed DSG (DQ250)
dual-clutch transmission, featuring a sport-tuned exhaust system and revised
engine mount calibration for sharper throttle response.
Volkswagen Passat B6 / Passat CC (2008-2011): The CBBB was offered in the Passat
B6 sedan and estate, as well as the Passat CC four-door coupe, as the
high-output 2.0 TDI variant. These applications emphasized the engine’s torque
delivery for highway cruising and towing capability, with specific calibration
for the Passat’s longitudinal engine mounting.
Volkswagen Scirocco (2008-2012): The Scirocco received the CBBB engine in the
2.0 TDI variant, providing a diesel option for the coupe model. The engine was
tuned for responsiveness in this application, with a sportier throttle map and
shorter final drive ratio in manual transmission versions.
Volkswagen Tiguan (2008-2012): In the Tiguan compact SUV, the CBBB engine was
offered as the 170 PS diesel option, featuring a reinforced cooling system and
additional underbody protection to accommodate the vehicle’s off-road capability
and increased thermal load.
Audi A3 (8P, 2008-2012): The CBBB engine was installed in the Audi A3 2.0 TDI
170 PS variant, marketed as the performance diesel alternative to the 2.0 TFSI
petrol engine. This application utilized a transverse engine mounting with
either front-wheel drive or Quattro all-wheel drive.
Audi TT (8J, 2008-2012): The TT 2.0 TDI received the CBBB engine as a
fuel-efficient performance option, featuring a sports suspension calibration and
the characteristic TT exhaust outlet arrangement.
Skoda Octavia RS (Mk2 vRS, 2008-2012): The CBBB powered the Octavia vRS diesel
variant, offering a combination of performance and fuel economy in the compact
estate and hatchback body styles. This application was particularly popular in
European fleet and enthusiast markets.
Skoda Superb II (2008-2012): The Superb II received the CBBB engine as the
high-output 2.0 TDI option, emphasizing refinement and low-end torque for the
large sedan and estate models. This application featured enhanced sound
insulation to meet the Superb’s premium NVH targets.
Seat Leon FR (Mk2, 2008-2012): The Leon FR 2.0 TDI utilized the CBBB engine,
positioned as the sport-oriented diesel variant within the Leon range. This
application included a sport-tuned exhaust and revised electronic stability
control calibration.
Seat Exeo (2009-2012): The Exeo - a rebadged Audi A4 - received the CBBB engine
as the 2.0 TDI 170 PS option, featuring longitudinal engine mounting and
rear-wheel drive architecture inherited from its Audi platform origins.
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