MTU Gas engine8 V 4000 L62 User manual

Operating Instructions
Gas engine
8 V 4000 L62
MS150032/02E

Printed in Germany
© 2012 Copyright MTU Friedrichshafen GmbH
This Publication is protected by copyright and may not be used in any way whether in whole or in part without the prior
written permission of MTU Friedrichshafen GmbH. This restriction also applies to copyright, distribution, translation, micro‐
filming and storage or processing on electronic systems including data bases and online services.
This handbook is provided for use by maintenance and operating personnel in order to avoid malfunctions or damage
during operation.
Subject to alterations and amendments.

Table of Contents
1 Safety
1.1 General conditions 5
1.2 Personnel and organizational requirements 6
1.3 Transport 7
1.4 Safety regulations for startup and operation 8
1.5 Safety requirements for maintenance and
repair work 9
1.6 Fluids and lubricants, fire prevention and
environmental protection 12
1.7 Conventions for safety instructions in the
text 15
2 Product Summary
2.1 Engine – Overview 16
2.2 Engine side and cylinder designations 18
2.3 Engine – Main dimensions 19
2.4 Firing order 20
2.5 Technical Data 21
2.5.1 Runtimes at partial load 21
2.5.2 8V 4000 L62 engine data, fuel-optimized (TA-
Luft) 22
2.5.3 8V 4000 L62 engine data, emissions-
optimized (1/2 TA-Luft) 26
2.6 Monitoring, Control and Regulation
Equipment 30
2.6.1 Gas engine phase 3 system – Overview 30
2.6.2 Control cabinet MIS – Overview 32
2.6.3 Purpose of the units 33
3 Operation
3.1 Putting the engine into operation after
extended out-of-service-periods (>3
months) 37
3.2 Putting the engine into operation after
scheduled out-of-service-period 38
3.3 Control, starting and stopping sequences 39
3.4 Starting the engine 40
3.5 Operational checks 41
3.6 Stopping the engine 42
3.7 Emergency stop 43
3.8 After stopping the engine – Engine remains
ready for operation 44
3.9 After stopping the engine – Putting the
engine out of operation 45
4 Maintenance
4.1 50-hours check 46
4.2 Maintenance task reference table [QL1] 47
5 Task Description
5.1 Engine 48
5.1.1 Engine – Barring manually 48
5.1.2 Checking machine room for smell of gas 49
5.2 Crankcase Breather 50
5.2.1 Oil separator – Filter replacement 50
5.3 Ignition System 52
5.3.1 Ignition system – Ignition timing check 52
5.3.2 Spark plug connector – Replacement 53
5.3.3 Spark plug connector – Removal and
installation 54
5.3.4 Spark plug – Replacement 56
5.3.5 Spark plug – Removal and installation 57
5.4 Valve Drive 59
5.4.1 Valve gear - Overview 59
5.4.2 Valve clearance – Check and adjustment 60
5.4.3 Valve depth – Measurement 62
5.4.4 Valve gear – Lubrication 65
5.4.5 Cylinder head cover – Removal and
installation 66
5.5 Gas System 67
5.5.1 Gas supply – Checking gas lines for leaks 67
5.6 Air Filter 68
5.6.1 Air filter – Replacement 68
5.6.2 Air filter – Removal and installation 69
5.7 Lube Oil System, Lube Oil Circuit 70
5.7.1 Engine oil level – Check 70
5.7.2 Engine oil – Change 71
5.7.3 Engine oil – Sample extraction and analysis 72
5.8 Oil Filtration / Cooling 73
5.8.1 Engine oil filter – Replacement 73
5.9 Coolant Circuit, General, High-
Temperature Circuit 74
5.9.1 Engine coolant – Level check 74
5.9.2 Engine coolant – Change 75
5.9.3 Engine coolant – Draining 76
5.9.4 Engine coolant – Filling 78
5.9.5 Vent line of engine coolant circuit –
Replacement 79
5.10 Low-Temperature Circuit 80
5.10.1 Mixture coolant level - Check 80
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5.10.2 Mixture coolant - Change 81
5.10.3 Mixture coolant - Draining 82
5.10.4 Mixture coolant - Filling 83
5.11 Wiring (General) for Engine/Gearbox/Unit 84
5.11.1 Engine wiring – Check 84
5.11.2 Sensors – Overview 85
6 Troubleshooting
6.1 Fault indication on SAM display 89
6.2 SAM – Fault messages 93
6.3 Engine governor – Fault messages 143
7 Appendix A
7.1 Abbreviations 174
7.2 MTU Onsite Energy contact / service
partner 176
8 Appendix B
8.1 Special Tools 177
8.2 Consumables 181
8.3 Spare Parts 182
8.4 Index 184
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1 Safety
1.1 General conditions
General
In addition to the instructions in this publication, the applicable country-specific legislation and other com‐
pulsory regulations regarding accident prevention and environmental protection must be observed. This
state-of-the-art engine has been designed to meet all applicable laws and regulations. The engine may
nevertheless present a risk of injury or damage in the following cases:
• Incorrect use
• Operation, maintenance and repair by unqualified personnel
• Modifications or conversions
• Noncompliance with the Safety Instructions
Correct use
The engine is intended solely for use in accordance with contractual agreements and the purpose envis‐
aged for it on delivery. Any other use is considered improper use. The engine manufacturer accepts no
liability whatsoever for resultant damage or injury in such case. The responsibility is borne by the user
alone.
Correct use also includes observation of and compliance with the operating instructions and mainte‐
nance and repair specifications.
Modifications or conversions
Unauthorized modifications to the engine represent a safety risk.
MTU will accept no liability or warranty claims for any damage caused by unauthorized modifications or
conversions.
Spare parts
Only genuine MTU spare parts must be used to replace components or assemblies. MTU accepts no
liability whatsoever for damage or injury resulting from the use of other spare parts and the warranty shall
be voided in such case.
Reworking components
Repair or engine overhaul must be carried out in workshops authorized by MTU.
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1.2 Personnel and organizational requirements
Personnel requirements
Work on the engine must only be carried out by appropriately qualified and instructed personnel.
Observe the minimum legal age.
Responsibilities of the operating, maintenance and repair personnel must be specified by the operating
company.
Organizational measures
This publication must be issued to all personnel involved in operation, maintenance, repair or transporta‐
tion.
Keep it handy in the vicinity of the engine such that it is accessible to operating, maintenance, repair and
transport personnel at all times.
Use the manual as a basis for instructing personnel on engine operation and repair. In particular, person‐
nel must have read and understood the safety-relevant instructions.
This is especially important for personnel who work on the engine only on an occasional basis. These
persons shall receive repeated instruction.
Use the Spare Parts Catalog to identify spare parts during maintenance and repair work.
Working clothes and protective equipment
Wear proper protective clothing for all work.
Depending on the kind of work, use the necessary personal protective equipment.
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1.3 Transport
Transport
Only use the lifting eyes provided to lift the engine.
Only use transport and lifting devices approved by MTU.
Take the engine's center of gravity into account.
The engine must only be transported in installation position, max. permissible diagonal pull 10°.
If the engine is supplied with special aluminum foil packing, lift the engine at the lifting eyes of the bear‐
ing pedestal or use a means of transportation which is appropriate for the given weight (forklift truck).
Install the crankshaft locking device and the locking screws for the engine mounts prior to engine trans‐
portation.
Secure the engine against tilting during transport. In particular when going down inclines or ramps, the
engine must be secured against moving and tilting.
Setting the engine down after transport
Only set down engine on a firm, level surface.
Make sure that the consistency and load-bearing capacity of the ground or support surface is adequate.
Never set an engine down on the oil pan unless expressively authorized to do so by MTU on a case-to-
case basis.
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1.4 Safety regulations for startup and operation
Safety precautions when putting the equipment into operation
Prior to initial operation of the assembly or plant, install the assembly or unit according to the specifica‐
tions and check the installation according to the MTU specifications.
Before putting the device or plant into operation, always ensure:
• that all maintenance and repair work is completed,
• that all loose parts have been removed from rotating machine components,
• that all persons are clear of the danger zone of moving machine components.
Immediately after putting the device or plant into operation, make sure that all control and display instru‐
ments as well as the monitoring, signaling and alarm systems are working properly.
Safety regulations for equipment operation
Emergency procedures must be practiced regularly.
The operator must be familiar with the controls and displays.
The operator must be familiar with the consequences of all operations to be performed.
During operation, the display instruments and monitoring units must be permanently observed with re‐
gard to present operating status, violation of limit values and warning or alarm messages.
The following steps must be taken if a malfunction of the system is recognized or reported by the system:
• inform supervisor(s) in charge,
• analyze the message,
• if required, carry out emergency operations e.g. emergency engine stop.
Engine operation
The following conditions must be fulfilled before starting the engine:
• Wear ear protectors.
• Ensure that the engine room is well ventilated.
• Do not inhale engine exhaust gases.
• Ensure that the exhaust system is free of leaks and that the gases are discharged to atmosphere.
• Mop up any leaked or spilled fluids and lubricants immediately or soak up with a suitable binding
agent.
• Protect battery terminals, battery-charger terminals and cables against accidental contact.
• When the engine is running, never release coolant, oil, fuel, compressed-air or hydraulic lines.
Operation of electrical equipment
When operating electrical equipment, certain components of this equipment are live.
Observe the safety instructions for these devices.
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1.5 Safety requirements for maintenance and repair work
Safety requirements for maintenance and repair work
Maintenance and repair work may only be carried out by authorized, qualified personnel.
All work on gas-carrying components must be carried out by authorized, specialized companies.
Installation and connection of the gas supply must only be carried out by a specialized company with
staff that has been trained and authorized for this task.
Before starting maintenance work, allow the engine to cool down (danger of explosion due to vapors),
shut off the gas supply to the engine and activate the emergency stop at the engine interface switch cabi‐
net (MIS) or by turning the keyswitch, if fitted.
Before starting work, relieve pressure in systems and compressed-air lines which are to be opened.
Take special care when removing ventilation or plug screws from engine. Cover the screw or plug with a
rag to prevent fluids escaping under pressure.
Take special care when draining hot fluids ⇒ risk of burning.
When changing the engine oil or working on the fuel system, ensure that the engine room is adequately
ventilated.
Prior to all work, allow the engine / genset to cool down.
Observe maintenance and repair instructions.
Never perform care or maintenance work with the engine running unless expressly instructed to do so.
Lock-out/tag-out the engine to preclude undesired starting.
With electric starter, disconnect the battery.
Close the main valve on the compressed-air system and vent the compressed-air line when air starters
are fitted.
Disconnect the control device from the assembly or plant.
Only use adequate, calibrated tools. During assembly and disassembly, observe the specified tightening
torques.
Carry out work only on assemblies or plants that are secured as specified.
Do not use lines as climbing aids.
Only use fuel lines or fuel system components that have been approved for the application in question.
Keep fuel lines and connections clean.
Always fit caps/covers to close off any openings exposed by removing or opening lines.
Take care to avoid damaging fuel lines in the course of care and maintenance work.
Ensure that all mounts and dampers are correctly installed.
Ensure that all fuel lines and pressurized oil lines have sufficient distance to other components to avoid
contact with them. Do not place fuel or oil lines near hot components.
Do not touch elastomeric seals (e.g. Viton sealing rings) if they have carbonized or resinous appearance.
Note cooling period for components which are heated for installation or removal ⇒ Risk of burning!
When working high on the engine, always use suitable ladders and work platforms. Make sure compo‐
nents are placed on stable surfaces.
Observe special cleanness during maintenance and repair work on the assembly or plant. After comple‐
tion of maintenance and repair work, make sure that no loose objects are in/on the assembly or plant.
Ensure that all personnel is clear of danger zones before turning the engine. Check that all guards have
been reinstalled and that all tools and loose parts have been removed after working on the engine.
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If starters with beryllium copper pinions are installed, the following also applies:
• To avoid health risks with the pinion containing beryllium, breathing protection of filter class P2 must
be worn during maintenance work. Do not blow out the interior of the flywheel housing and the starter
with compressed air. The interior of the flywheel housing must be additionally cleaned with a dust-
removal machine of class H.
Welding work
Never carry out welding work on the assembly or engine plant or mounted units. Cover the engine when
welding in its vicinity.
Observe the following before starting welding work on the MTU electronic system:
• Switch the main power switch to "OFF".
• Disconnect the cables and the negative and positive poles of the battery.
Do not use the assembly or plant as a ground terminal.
Never place the welding cable across or near wiring harnesses of MTU plants. The welding current may
otherwise induce an interference voltage in the wiring harnesses which could damage the electrical sys‐
tem.
If welding has to be carried out on components (e.g. exhaust manifold), these components must first be
removed from the engine.
Hydraulic installation and removal
Check the tools and devices to be used for perfect operation and safe condition. Only use the specified
devices for force-fitting/removing parts.
Observe the maximum press-on pressure for the device for force-fitting/removing parts.
Do not attempt to bend or exert force on H.P. lines.
Observe the following before starting the pressing procedure:
• Bleed air from the device for force-fitting/removing parts, pumps and piping at the points provided for
the system concerned (e.g. open threaded vent plugs, pump until no bubbles can be discerned in the
oil, close threaded vent plugs).
• During the installation procedure, screw on device with pushed-in plunger.
• During the removal procedure, screw on device with retracted plunger.
For a hydraulic installation/removal tool with central expansion pressure supply, screw spindle into shaft
end until correct sealing is established.
During hydraulic installation/removal of components, ensure that no persons are in the direct vicinity of
the component being pressed.
Working on electrical/electronic assemblies
Before starting any maintenance or repair work, or before switching off any electronic components nec‐
essary to carry out the work, permission must first be obtained from the relevant manager or supervisor.
Before work is carried out on the assemblies, the power supply to the relevant areas must be switched
off.
Do not damage wiring during the removal work. When reinstalling, ensure that the wiring cannot be dam‐
aged during engine operation through contact with sharp edges, rubbing against a component or through
contact with a hot surface.
Do not secure cables on lines carrying fluids.
Do not use cable clamps to secure the lines.
Observe the following when working with batteries:
• Avoid sparks and naked flames.
• Keep electrolyte away from the skin and clothing. Wear protective goggles.
• Do not place tools on the battery.
• Before connecting the cable to the battery, check the battery polarity.
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Only tighten union nuts of connectors with connector pliers.
On completion of all repair work, the device or system must undergo a function check.
Before replacement, ensure that spare parts are correctly stored, i.e. in particular, protected against
moisture. Defective electronic components and assemblies must be suitably packed when dispatched for
repair, i.e. in particular, protected against moisture and impact and wrapped in antistatic foil if necessary.
Work with laser devices
When working with laser equipment, always wear special laser-protection goggles ⇒ eye injury through
strongly concentrated beam.
Laser devices must be equipped, in accordance with their class and usage, with protective devices for
ensuring safe operation.
For conducting light-beam procedures and measurement work, only the following laser devices may be
used:
• Laser devices in classes 1, 2 or 3A.
• Laser devices of class 3B, which have maximum output in the visible wavelength range (400 to 700
nm), a maximum output of 5 mW, and in which the beam axis and surface have been designed in
such a way as to prevent any risk to the eyes.
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1.6 Fluids and lubricants, fire prevention and environmental
protection
Fire prevention
Correct fuel or oil leaks immediately. Quantities of oil or fuel on hot components can cause fires – there‐
fore always keep the engine in a clean condition. Do not leave cloths soaked with fluids and lubricants
lying on or near the assembly or plant. Do not store inflammable material near the assembly or plant.
Do not weld pipes and components carrying oil or fuel. Before welding, clean with a nonflammable fluid.
When starting the engine with an external power source, connect the ground lead last and remove it first.
To avoid sparks in the vicinity of the battery, connect the ground lead from the external power source to
the ground lead of the engine or to the ground terminal of the starter.
Always have a suitable extinguishing agent (fire extinguisher) on hand and familiarize yourself fully with
its handling.
Noise
Noise can lead to an increased risk of accidents if acoustic signals, warning shouts or sounds indicating
danger are drowned.
At all workplaces with a sound pressure level over 85 dB(A), always wear ear protectors.
Environmental protection and disposal
Modification or removal of mechanical or electronic components or the installation of additional compo‐
nents as well as the execution of calibration processes that might affect the emission characteristics of
the engine are prohibited by emission regulations. Emission control units/systems may only be main‐
tained, exchanged or repaired if the components used for this purpose are approved by MTU. Noncom‐
pliance with these guidelines might represent a violation of the Clean Air Act and could involve the termi‐
nation of the operating license by the emission authorities. MTU does not accept any liability for viola‐
tions of the emission regulations. MTU will provide assistance and advice if emission-relevant compo‐
nents are intended to be modified. The MTU Maintenance Schedules ensure the reliability and perform‐
ance of MTU engines and must be complied with over the entire life cycle of the engine.
Only fuels of the specified quality required to achieve emission limits must be used.
Dispose of used fluids, lubricants and filters in accordance with local regulations.
Batteries can be returned within the EU to MTU FN / MTU Onsite Energy free of charge for correct recy‐
cling/disposal.
Fluids and lubricants
Use only fluids and lubricants that have been tested and approved by MTU.
Fluids and lubricants must be kept in suitable, correctly labeled containers. When using fluids, lubricants
and other chemical substances, follow the safety instructions that apply to the product. Take special care
when using hot, chilled or caustic materials. When using flammable materials, avoid all sparks and do
not smoke.
Natural gas
Observe the safety data sheet.
Caution: Highly flammable gas, forms an explosive mixture with air/oxygen!
Caution: Weak narcotic gas, risk of suffocation at very high concentration!
All gas-carrying lines must be checked for leaks prior to commissioning and at regular intervals during
operation.
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Procedure in the case of accidental release of combustible gas:
• Seal point of gas escape!
• Remove ignition sources!
• Cordon off danger zone.
• Ensure sufficient ventilation!
• Do not enter danger zone before measurements have confirmed that gas concentration is not hazard‐
ous.
Biogenic gases from fermentation processes
Observe the safety data sheet.
Caution: Highly flammable gas, forms an explosive mixture with air/oxygen!
Caution: Can be life threatening depending on concentration! Can no longer be detected by sense of
smell in higher concentrations.
Caution: There is always a risk of suffocation! Due to the lack of oxygen, the absorption of methane can
occasionally lead to increased breathing frequency (hyperventilation) and heart rates, low blood pres‐
sure, numbness of the extremeties, drowsiness, mental confusion and loss of memory!
Tendency to segregate. In low-lying areas of the plant, carbon dioxide enrichment is possible.
All gas-carrying lines must be checked for leaks prior to commissioning and at regular intervals during
operation.
Procedure in the case of accidental release of combustible gas:
• Seal point of gas escape!
• Remove ignition sources!
• Cordon off danger zone.
• Ensure sufficient ventilation!
• Do not enter danger zone before measurements have confirmed that gas concentration is not hazard‐
ous.
Used oil
Used oil contains combustion residue harmful to health.
Rub your hands with skin protection cream.
Wash your hands after contact with used oil.
Lead
• When working with lead or lead-containing compounds, avoid direct contact to the skin and do not
inhale lead vapors.
• Prevent the buildup of white powder of lead.
• Switch on fume extraction system.
• After coming into contact with lead or lead-containing materials, wash your hands!
Compressed air
When working with compressed air, safety precautions must be constantly observed:
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• Pay special attention to the pressure level in the compressed air network and pressure vessel!
• Assemblies or plants to be connected must either be designed for this pressure, or, if the permitted
pressure for the connecting elements is lower than the pressure required, a pressure reducing valve
and safety valve (set to permitted pressure) must form an intermediate connection.
• Hose couplings and connections must be securely attached.
• Always wear protective goggles when blowing off tools or extracting chips.
• Provide the mouthpiece of the air nozzle with a protective disk (e.g. made of rubber).
• First shut off compressed air lines before compressed air equipment is disconnected from the supply
line, or before equipment or tool is to be replaced.
• Unauthorized use of compressed air, e.g. forcing flammable liquids (danger class AI, AII and B) out of
containers, results in a risk of explosion!
• Forcing compressed air into thin-walled containers (e.g. containers made of tin, plastic and glass) for
drying purposes or to check for leaks, results in a risk of bursting!
• Carry out the leak check as specified.
Painting
• When carrying out painting work outside the spray stands provided with fume extraction systems, en‐
sure that the area is well ventilated. Make sure that neighboring work areas are not impaired.
• No naked flames!
• No smoking!
• Observe all fire-prevention regulations!
• Always wear a mask providing protection against paint and solvent vapors!
Liquid nitrogen
• Store liquid nitrogen only in small quantities and always in specified containers without fixed covers.
• Avoid body contact (eyes, hands).
• Wear protective clothing, protective gloves, closed shoes and protective goggles / safety mask!
• Make sure that working area is well ventilated.
• Take great care not to subject containers, fittings and tools to impact or shock.
Acids/alkaline solutions
• When working with acids and alkalis, wear protective goggles or face mask, gloves and protective
clothing.
• If acids or alkalis are spilled onto clothing, remove the affected clothing immediately!
• Rinse injured parts of the body thoroughly with clean water!
• Rinse eyes immediately with eyedrops or clean mains water!
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1.7 Conventions for safety instructions in the text
DANGER In the event of immediate danger.
Consequences: Death or serious injury
• Remedial action
WARNING In the event of potentially dangerous situations.
Consequences: Death or serious injury
• Remedial action
CAUTION In the event of dangerous situations.
Consequences: Minor injury or material damage
• Remedial action
NOTICE In the event of a situation involving potentially adverse effects on the product.
Consequences: Material damage.
• Remedial action
• Additional product information
Note: This manual contains highlighted safety warnings in accordance with the US ANSI Z535 standard which
begin with one of the signal words listed above depending on the severity of the hazard.
Safety instructions
1. Read and familiarize yourself with all safety notices before starting up or repairing the product.
2. Pass on all safety instructions to your operating, maintenance, repair and transport personnel.
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2 Product Summary
2.1 Engine – Overview
1 Engine governor/engine
monitoring
2 Air filter/air inlet
3 Mixture cooler
4 Exhaust turbocharger
5 Engine lifting equipment
6 Capacitor ignition sys‐
tem
7 Engine mounting brack‐
et, free end
8 Oil pan
9 Engine mounting brack‐
et, driving end
10 Starter
11 Flywheel
KS Driving end
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1 Crankcase breather, oil
separator
2 Exhaust gas outlet con‐
nection
3 Gas dosing and mixing
unit (Tecjet)
4 Gas inlet connection
5 Throttle
6 Ignition coil
7 Spark plug
8 Cylinder head cover
9 Cylinder head
10 Engine oil sampling con‐
nection
11 Engine oil filter
12 Oil level switch
13 Engine coolant inlet
connection
14 Engine oil heat ex‐
changer
15 Engine coolant outlet
connection
KGS Free end
Engine model designation
Explanation of the engine model designation 8 V 4000 L62/L63
8 Number of cylinders
V Cylinder arrangement: V engine
4000 Series
L Application: L = Gas engine
6 Application segment
2, 3 Design index
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2.2 Engine side and cylinder designations
Engine sides are always designated as viewed from the driving end (KS).
The cylinders of the left engine side are designated "A" and those of the right side "B" (as per DIN ISO
1204). The cylinders of each bank are numbered consecutively, starting with No. 1 at the driving end.
Other components are numbered in the same way, i.e. starting with No. 1 on driving end.
1 Left engine side
2 KGS = Free end
3 Right engine side
4 KS = Driving end
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2.3 Engine – Main dimensions
Engine main dimensions
Deviations from illustrations are insignificant.
Applies in the same way also to 8V and 16V.
Length (A) approx. 2190 mm
Width (B) approx. 1751 mm
Height (C) approx. 2105 mm
Crankshaft center to oil pan (D) approx. 625 mm
Crankshaft center to engine mount (E) approx. 281 mm
Table 1: Engine main dimensions
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2.4 Firing order
Firing order
8V A1-A3-A4-A2-B3-B4-B2-B1
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