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Peugeot 308 Owners & Service Manuals

Peugeot 308: Organisation bulletin : Commercial launch of the turbocharged EB2 engine (EB2 LT) - Generation 3 - Emission control standard EURO 6.4

Peugeot 308 2021-2024 (P5) Service Manual / Vehicle :: General / Data - identification / Organisation bulletin : Commercial launch of the turbocharged EB2 engine (EB2 LT) - Generation 3 - Emission control standard EURO 6.4

This bulletin includes all of the technical information required by authorised repairers and new vehicle and replacement part distributors for the launch EB2of the third generation turbocharged engine, emission control standard Euro 6.4 (STELLANTIS internal standard or European standard EURO 6.E) for passenger vehicles.

This bulletin must be presented and distributed in each dealership of the network by each department manager :

  • New vehicle sales : The sales manager must present this bulletin to all new vehicle sales staff and give them a copy
  • Service : The service manager must present this bulletin to all service staff and give them a copy
  • Replacement parts activity : The parts manager must present this bulletin to all parts staff and give them a copy

Key information to be noted in particular.

CAUTION : Prerequisite : Refer to the bulletin "Commercial launch of the engines EB2 complying with the emission control standard EURO 6.1", bulletin available on the manufacturer’s aftersales documentation portal.

CAUTION : Prerequisite : Refer to the "Commercial launch of petrol engines that comply with the EURO 6.2 emission control standard" bulletin, available on the manufacturer’s aftersales documentation portal.

CAUTION : Do not use additives in the engine oil and only additives for fuel "UNIK" and "UNIK+" for petrol engines are compatible with the engines EB.

CAUTION : /!\ : Absolutely no versions and generations of the engines EB2 are compatible with the use of ethanol E85, including conversion kits. The use of this fuel and of these systems will cause premature wear and malfunctions which will damage the engine and will not be covered or accepted under the manufacturer’s warranty.

Engine range EB2 of generation 3 is offered in 4 engine bases.

Europe version only :

  • EB2 LTDHigh power version (136 HP)
  • EB2 LTEDStandard version (100 HP)

World version (Outside Europe) :

  • EB2 LTDMHigh power version (130 HP)
  • EB2 LTEDMStandard version (110 HP)

Main information and key points in the bulletin :

  • Manufacture of engines in Europe : The Trémery assembly and manufacturing plants initially, then Szentgotthard and Tychy
  • Manufacture of engines outside Europe : Assembly and manufacturing plant in Hosur, India (For the world version)
  • The new generation of engine EB2 only exists in the turbocharged version
  • The first adaptation concerns the EB2LTD engine on the CMP platform in January 2023 and will follow at a later date on the SmartCar platform
  • European engines : With manual gearbox MB6
  • World engines : With MB6 manual gearbox or automatic gearbox AT6-3
  • Engine structure EB : 3 cylinders, chain drive timing, variable geometry turbocharger, one-piece cylinder head 12 valve
  • Engine management ECU BOSCH V13.50

1. Glossary

Abbreviation Definition
CMM Engine management ECU
TGV Variable geometry turbocharger
MHEV Mild Hybride Electric Vehicle
VVT Variable valve timing :Variable timing
GPF Gaz Particule Filter : Particle filter

2. Product description

To prepare for the future of petrol power train assemblies after 2022, STELLANTIS must replace the generation 2 turbocharged EB2 engines to comply with the new regulations in Europe and China and also to have an engine in Korea (SULEV30) to achieve objectives CAFE and CAFC.

To do this, STELLANTIS has developed a new generation of the turbocharged EB2 engine compatible with hybridisation (MHEV).

This engine is available in 2 power outputs : 136 ch for launch, then 100 hp.

For Europe, the engine is fitted with the STTd function : Stop and Start by starter motor function.

The Trémery manufacturing plant, in France, is the first factory on the 4 to manufacture and assemble this engine.

The EB2 LTD engine has been designed to meet the emission control standard EURO 6D FULL which has been in force since January 2021 and above all comply with standard EURO 6E which should come into force in January 2025.

For STELLANTIS, this engine :

  • Is manufactured in compliance with the emission control standard EURO 6.4 (internal group standard)
  • Achieves and improves on the emission control and fuel consumption objectives according to the measurement cycle WLTP
  • Therefore reduces its emission rate by CO2 by 4 grammes, i.e. a 3 % improvement compared to the EB2 turbocharged engine of generation 2 in version EURO 6.3
  • Benefits from a choice of architecture and technology guided by the desire to limit fuel consumption and reduce emissions of pollutant and greenhouse gases, while maintaining their high performance levels
  • Shares 60 % of these parts with the turbocharged EB2 engines of the previous generation

This engine has been designed to cover a wide range of regulations, including :

  • The emission control standard EURO 6E for Europe
  • The United States regulation for Korea
  • The emission control standard Bharat 6.2 for India
  • The emission control standards EURO 4, EURO 5 and EURO 6 for the engine variants for the world version
  • The pre-equipment for the emission control standard China 7
  • The pre-equipment for the emission control standard EURO 7

Compared to the generation 2 turbocharged EB2 engine, the main differences are :

  • The silent chain drive which improves the strength of the engine
  • The electrically controlled variable geometry turbocharger to extend the range of performance at low and high engine speeds
  • The valve controls with roller cam followers and hydraulic stops, instead of mechanical tappets, to adapt the air inlet valve lift to the MILLER combustion cycle
  • The pistons with a compression ratio to 11,5 with cooling rack
  • A continuous variable intake system (VVT) with a central solenoid valve

2.1. Achievement of the objectives of the emission control standard EURO 6.4 and reduction of emissions of CO²

The increasingly strict emission control standards have imposed the adoption of more precise technologies in the control of fuel delivery( This delivery is characterised by the air/fuel mixture richness).

To improve efficiency and save fuel, the following conditions are necessary :

  • Get closer to ideal combustion during moderate use of the engine and increase the mixture richness during demands for power
  • Be able to switch off the petrol injection during deceleration

The Air–Fuel Ratio (AFR) (true mass ratio of air to fuel) indicates the mass of air consumed per 1 grammes of fuel.

The lambda ratio is the ideal delivery to fuel delivery ratio and therefore is the opposite of the mixture richness.

The ideal delivery of 1 grammes of fuel for 14,7 grammes of air, also referred to as the "stoichiometric mixture", generates uniform and complete combustion, which creates low levels of pollution. This delivery ensures the best engine efficiency, resulting in lower fuel consumption but at the expense of power.

When the lambda ratio is equal to 1, power and fuel consumption are not optimal but offers better efficiency, uniform and complete combustion, and, above all, low emission of pollutants.

To achieve the objectives of the emission control standard, STELLANTIS has chosen the generation EB2 engine 3 :

  • To improve the functional diagnostics of the engine
  • An air–fuel (AFR) ratio with a lambda ratio of 1 in operation
  • A new high pressure fuel injection BOSCH system at 350 bars
  • Optimised fuel spray via new injectors
  • A monobloc catalytic converter adapted to the regulations
  • A high efficiency particle filter (GPF)
  • An under-body catalytic converter for arduous-condition regulations

Parts and assemblies affected :

  • Engine management ECU (CMM)
  • Exhaust gas treatment system : Particle filter assembly (GPF) / catalytic converter, lambda sensors and under-body catalytic converter
  • Central direct injection system
  • Ignition system
  • New oil separator without relief valve and addition of a take-off for recycling oil vapours (blow-by)

The "central direct injection" system includes :

  • The electromagnetic injectors BOSCH, located as close as possible to the spark plugs, centred in the combustion chamber and positioned to permit directed spraying
  • The single-piston, high-pressure fuel pump, with a pressure of 350 bars, is driven via the inlet camshaft via a 3 face cam and a roller tappet
  • The fuel high pressure common injection rail made of metal is equipped with a sensor that measures the fuel pressure

N.B. : A very fine droplet spray by the fuel injectors is produced by means of 6 holes made by a laser process.

The ignition system includes( per cylinder) :

  • Static lighting with a pencil ignition coil
  • A high performance angled spark plug

2.2. Reduced fuel consumption

To reduce fuel consumption by 3 % compared to the previous generation turbocharged EB2 engine, a new combustion cycle has been incorporated.

The objective was achieved by using the MILLER combustion cycle, instead of the BEAU de ROCHAS cycle, combined with a higher combustion rate at 11,5 (instead of 10,5) and the operation of a new electrically controlled variable geometry turbocharger.

The compression rate increased to 11,5 is the result of a new combustion chamber design (cylinder head and piston).

Special work has been carried out to losses due to engine friction.

Parts and assemblies affected.

Engine top :

  • New cylinder head : Adaptation for the timing chain, optimisation of combustion chambers for the MILLER combustion cycle
  • New piston, fitted with a cooling gallery without a piston ring holder and with a new scraper ring, with a compression ratio of 11,5
  • Monobloc camshaft carrier
  • Valve controls with roller cam followers and hydraulic stops, instead of mechanical tappets
  • Twin camshaft dephasing central solenoid valves
  • New vacuum pump
  • Merging of the coolant outlet housing

Timing front panel :

  • Drive of the silent timing chain
  • Automatic hydraulic chain tensioner for toothed chain drives
  • Fitting of the timing belt gear drive assembly cassette

2.3. Engine performances

Depending on the engine version, the power has changed from 74 to 100 kW (100 at 136 bhp), slightly higher than the previous generation.

Torque is available over a wide range from 190 to 230 Nm, identical to the previous generation of EB turbocharged engine, with the aim of maintaining the best performance in this category.

In order to achieve these performance targets, the following conditions are necessary :

  • Increase in turbocharging pressure to 350 bars to cope with the new MILLER combustion cycle
  • Check of the exhaust gas temperature using the variable geometry turbocharger to avoid the increase in temperature at the exhaust outlet
  • Deployment of dedicated engine management system to manage the transitional operations at low engine speeds and to prevent self-ignition

Parts and assemblies affected.

Air turbocharging :

  • New turbocharger air intake pipe with resonator, air flow sensor and new canister system with Venturi
  • New thinner air filter coating
  • Air inlet manifold and new motorised throttle housing adapted for compatibility MHEV and improved quality
  • New variable geometry turbocharger with pressure relief valve or relief valve (dump valve) and without temperature sensor T3 with water cooling
  • New heat shield under the turbocharger and addition of a silicone heat barrier between the top of the turbocharger and the cylinder head to contain the heat flows and protect the upper engine

N.B. : The world engines retain the fixed geometry turbocharger.

Engine bottom :

  • Strengthening of the cylinder block to fulfil the requirements of the MILLER combustion cycle (Combustion pressure)
  • Compatibility with adaptation MHEV with the hybrid dual-clutch piloted manual gearbox eDCT
  • Compliance with impact standards for head-on collisions (anti-flexion)
  • New design of the main crankshaft bearing caps
  • Strengthening of the crankshaft supply shell bearings and new upper con rod shell bearings
  • Adaptation of the cylinder block to run the new timing front panel using a chain drive
  • New oil pump with increased flow, moving from a capacity of 15 cm3 to 24 cm3

2.4. Special feature of the EB2 generation 3 engine for vehicles MHEV

The engine base has been developed to be compatible with the vehicle restrictions MHEV.

Parts and assemblies affected :

  • The cylinder block (Special fixing bolt, compatible with the hybrid dual-clutch piloted manual gearbox eDCT)
  • The upper oil sump (Addition of fixing for the accessory support)
  • The new reinforced shell bearings
  • The starter drive belt 48 V (Damping torque by the damper pulley)
  • The coolant outlet housing
  • The coolant inlet manifold
  • The motorised throttle housing

The special features include :

  • Deletion of the conventional starter
  • The 2 electric coolant pumps in the heating and electric drive train cooling systems
  • The 48 V starter in place of the conventional alternator

2.5. Identification of the engines that comply with the emission control standard EURO 6.4

The information relating to the engine is available on the manufacturer’s aftersales documentation portal ↦Using the vehicle’s VIN or VIS ↦Documentation ↦Technical documentation ↦Data ↦Engine fuel system.

2.6. Technical data

Engine EB2LTED EB2LTD
Power 75 kW / 100 HP 100 kW / 136 HP
Engine torque 205 Nm 230 Nm
Speed of rotation range 750 to 6250 rpm
Emission control standard Euro6.4
Cubic capacity 1199,9 cc
Bore x stroke (mm) 75 mm x 90,5 mm
Compression ratio 11,5 : 1
Arrangements 3 cylinders in line2 camshaft
Thermodynamic cycle Operation of the engine in the MILLER combustion cycle
Fuel petrol (With minimum RON 91 )
Fuel supply system Direct injection - 350 bar
Air supply Variable geometry turbochargerVariable timing via the intake and exhaust valves
Exhaust circuit Catalytic converter 3 -way with narrow couplingParticle filter 2Oxygen sensors

3. Aftersales documentation

The VIN must be entered in order to access the technical documentation, which can be viewed in the manufacturer’s aftersales documentation portal :

  • The principles of operation that explain all the functions of the engine
  • The diagnostic aids
  • The tables of fault codes
  • The replacement parts catalogue
  • The repair and maintenance procedures
  • The relevant repair time schedules
  • The documentation for specific tools

4. Maintenance

CAUTION : During servicing operations, check the engine coolant level and top it up, if necessary.

The maintenance conditions are described in the servicing schedule taken from the manufacturer’s Aftersales documentation portal and given to the customer on handover.

The information relating to the maintenance conditions is available on the manufacturer’s Aftersales documentation portal : Using the vehicle’s VIN or VIS ↦Documentation ↦Technical documentation ↦Maintenance ↦Service schedules.

4.1. Maintenance programme:

To benefit from the full servicing schedule and the latest updates : .

Consult the servicing schedule on the manufacturer’s aftersales documentation portal (Using the vehicle’s VIN or VIS).

Geographical area Systematic operations
Europe : In normal conditions of use 25000 km or 1 year(*) (16000 miles)
Europe : In arduous conditions of use 15000 km or 1 year(*) (10000 miles)
Outside Europe 10000 km or 1 year(*) (6000 miles)
Outside Europe (With dispensation) 15000 km or 1 year(*) (10000 miles)

(*) The servicing schedule frequency of 1 year may be increased to 2 years, following the implementation of the double service counter on the vehicle.

4.2. Configuration of the servicing schedule

Using the diagnostic tool, the "Maintenance" menu permits access :

  • To the servicing operations
  • To the maintenance operations
  • To the 12 V battery state of charge measuring operation
  • The frequency of the servicing depends on the countries and the conditions of use. Refer to the organisation bulletin which covers this subject

4.3. Engine oil

The EB2 LTD and EB2 LTED engines, which comply with the emission control standard EURO 6.4, have been developed with the use of synthetic oil that complies with standards B71 2010 with a grade of viscosity (0W20) to allow :

  • Reduced fuel consumption
  • Protection of the emission control system
  • Improved cold starts, including at very low temperatures

Recommended grades Specifications
Europe (Unit A) : 0W20 B71 2010
Outside Europe (Unit B) : 5W30 B71 2297

To benefit from the latest updates and detail by country group : Refer to the procedure available on the manufacturer’s aftersales documentation portal : .

Recommended consumables : Engine oils .

CAUTION : Only engine oils complying with the STELLANTIS standards are authorised.

4.4. Engine oil volumes

Engine Type of draining Maximum oil volume
EB2 LTDEB2 LTEDEB2 LTDM With replacement of the filter cartridge 3,5 litres
Without replacement of the filter cartridge 3 litres
Consumable (Volume between minimum and maximum) 1 litre

In order to benefit from the latest updates : Refer to the procedure available on the manufacturer’s aftersales documentation portal : Checking and adjusting values : EB2L engine type .

5. Repair

5.1. Operations to be performed : Before disconnection and after reconnection of the ancillaries battery

CAUTION : For vehicles fitted with the Stop and Start function, use genuine batteries to protect their service life.

Refer to the method : .

Operations to be performed : Before disconnection and after reconnection of the ancillaries battery .

5.2. Mechanical repair

Refer to the repair procedures : Removing - refitting : Mechanical components: .

6. New tools

The EB2LTD and EB2LTED engines, which comply with the emission control standard EURO 6.4, take a part of the special tools developed for the EB engine of the 1 and 2 generations.

2 new tool kits have been developed for this new engine :

  • Timing chain setting kit
  • Kit for fitting fuel injector seals

7. Warranty

No special feature for this engine.

8. Recall campaigns

No special feature for this engine.

9. Escalation of customer incidents

Refer to the organisation bulletin which covers this subject : Feedback procedure (QUALITY FIRST) .

10. Technical assistance

The "Dealer Issue Detection Assistance" (DID-A) is used to contact technical assistance.

Observe the DID standards (Manufacturer’s Aftersales documentation portal : "Incidents-Assistance" tab ↦Practical information ↦DID standards) :

  • Relevance standard
  • Quality standard

N.B. : Refer to the organisation bulletin which covers this subject.

Peugeot 308 2021-2024 (P5) Service Manual

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