Porsche training p52 991 981 body and structural repair

AfterSales Training 991/981 Body & Structural Repair P52 Porsche AfterSales Training Student Name: Training Center Location: Instructor Name: Date: _ Important Notice: Some of the contents of this AfterSales Training brochure was originally written by Porsche AG for its rest-ofworld English speaking market The electronic text and graphic files were then imported by Porsche Cars N.A, Inc and edited for content Some equipment and technical data listed in this publication may not be applicable for our market Specifications are subject to change without notice We have attempted to render the text within this publication to American English as best as we could We reserve the right to make changes without notice © 2015 Porsche Cars North America, Inc All Rights Reserved Reproduction or translation in whole or in part is not permitted without written authorization from publisher AfterSales Training Publications Dr Ing h.c F Porsche AG is the owner of numerous trademarks, both registered and unregistered, including without limitation the Porsche Crest®, Porsche®, Boxster®, Carrera®, Cayenne®, Cayman®, Macan®, Panamera®, Speedster®, Spyder®, 918 Spyder®, Tiptronic®, VarioCam®, PCM®, PDK®, 911®, RS®, 4S®, FOUR, UNCOMPROMISED®, and the model numbers and the distinctive shapes of the Porsche automobiles such as, the federally registered 911 and Boxster automobiles The third party trademarks contained herein are the properties of their respective owners Porsche Cars North America, Inc believes the specifications to be correct at the time of printing Specifications, performance standards, standard equipment, options, and other elements shown are subject to change without notice Some options may be unavailable when a car is built Some vehicles may be shown with non-U.S equipment The information contained herein is for internal authorized Porsche dealer use only and cannot be copied or distributed Porsche recommends seat belt usage and observance of traffic laws at all times Printed in the USA Part Number - PNA P52 004 Edition - 2/15 Table of Contents Description Section Porsche Vehicle Identification Number (VIN) Structure ii Model Designation iii Repair Group Numbering iv Vehicle Introduction Dedicated Bench Systems Structural Repair 9x1 Body & Structural Repair Page i VIN Structure Porsche Vehicle Identification Number (VIN) Structure Example Below: 2005 911 (997) As of Model Year 2010: VIN position was changed to a “A”, leaving positions & 12 as Porsche model type designation digits Model Years 1981–2009: Used VIN positions 7, & 12 as Porsche model type designation digits USA model years in ( ) 911 = 911 (1981-89) 924 = 924/S (1981-88) 928 = 928 (1981-95) 930 = 911 Turbo (1981-89) 931 = 924 Turbo (1981-82) 944 = 944 (1985-91) 951 = 944 Turbo (1986-90) 964 = 911 (964) (1989-94) 968 = 968 (1992-95) 980 = Carrera GT (2004-06) 986 = Boxster (1997-04) 987 = Boxster (2005-09) 987 = Cayman (2006-09) 993 = 911 (993) (1995-98) 996 = 911 (996) (1999-05) 997 = 911 (997) (2005-09) 9PA = Cayenne (2003-09) A81 = Boxster (981) (2013-on), Cayman (981) (2014-on) A87 = Boxster (987) (2010-12), Cayman (987) (2010-13) A91 = 911 (991) (2013-on) A97 = 911 (997) (2010-12) A70 = Panamera (2010-on) (All models including Hybrid) APA = Cayenne (2010) A2A = Cayenne (2011-on) (All models including Hybrid) A5B = Macan (2015) A18 = 918 Spyder (2015) Make Porsche WP0 = Sports Cars Panamera WP1 = Cayenne Macan * Position uses alpha characters A, B, C, etc to indicate model types, such as; Coupe, Cabriolet, Targa, SUV (Cayenne), sedan (Panamera), etc This character can vary from year to year Position uses alpha characters A, B, C, etc to indicate engine types, such as; normally aspirated, turbo, Hybrid, etc This character can vary from year to year Page ii ** * L M N P R S T V W X Y = 1990 = 1991 = 1992 = 1993 = 1994 = 1995 = 1996 = 1997 = 1998 = 1999 = 2000 = 2001 = 2002 = 2003 = 2004 = 2005 = 2006 = 2007 = 2008 A B C D E F G H J K L M N P R S T V = 2009 = 2010 = 2011 = 2012 = 2013 = 2014 = 2015 = 2016 = 2017 = 2018 = 2019 = 2020 = 2021 = 2022 = 2023 = 2025 = 2026 = 2027 = 2028 N = Neckarsulm S = Stuttgart - Zuffenhausen U = Uusikaupunki, Finland - 987 Models L = Leipzig K = Osnabrück Footnotes: * Please check the specific VIN in the Model Information, PPK Group 17, D2 series for exact vehicle specific Model Type and Engine Type ** See PPK Bulletin Group 16 D12 for complete list 9x1 Body & Structural Repair Model Designations Model Designations Used In Parts Catalogs and Workshop Manuals 911 911 (various cylinder) 911T .911 model (1968-73) 911T 911 Turbo 911S .911S (1975-77) 911SC 911SC (1978-83) 911C .911 Carrera (1984-89) 911C2 911 Carrera 911C4 911 Carrera 911RS RS America (1993-94) 912E 912E (1976) 914 914 (various models) 918 918 Spyder (2015) 924 924 (various models) 924T 924 Turbo 924S .924S (1987-88) 928 928 (various cylinder) 928S .928S 928 S4 928 S4 (1987-91) 928 GT 928 GT (1989-91) 928 GTS 928 (1993-95) 944 944 (various models) 944T 944 Turbo 944TS 944 Turbo S (1988) 944S 944S (1987-88) (4 valve) 944 S2 944 S2 (1989-91) (4 valve) 951 944 Turbo 964 911 (1989-94) 968 968 970 Panamera (1st Generation) (2010-13) 970 Panamera (2nd Generation) (2014-on) 980 .Carrera GT 981 Boxster (2013-on) 981 Cayman (2014-on) 986 Boxster (1997-04) 987 Boxster (1st Generation) (2005-08) 987 Boxster (2nd Generation) (2009-12) 987 .Cayman (1st Generation) (2006-08) 987 Cayman (2nd Generation) (2009-12) 991 911 (2012-on) 993 911 (1995-98) 996 911 (1999-05) 997 911 (1st Generation) (2005-08, Turbo 2007-09) 997 911 (2nd Generation) (2009-12, Turbo 2010-13) 9PA Cayenne (E1 - 1st Generation) (2003-06) 9PA .Cayenne (E1 - 2nd Generation) (2008-10) 92A Cayenne (E2 - 1st Generation) (2011-14) 92A Cayenne (E2 - 2nd Generation) (2015) 95B .Macan (2015) 9x1 Body & Structural Repair Page iii Repair Group Numbering Porsche Cars N.A divides the entire vehicle into the following repair groups This listing is not all-inclusive, but it is a handy list to have as you learn how to use the coding system – Body, Lids, Doors 5X Body – General * 50 Body, front 51 Body center, roof, frame 53 Body, rear 55 Lids, flaps 57 Door front, central locking system 58 Door rear, central locking – Complete Vehicle – General 0X Complete vehicle – General * 01 Sales check * 03 Maintenance, diagnostics 08 Symptoms * 09 Porsche system components – Engine 1X Engine – General* 10 Engine - Crankcase, suspension 13 Engine - Crankshaft, pistons 15 Engine - Cylinder head, valve control 17 Engine - Lubrication 19 Engine - Cooling – Fuel System, Exhaust System & Engine Electrics 2X Fuel, exhaust & engine electrics – General * 20 Fuel supply, control 21 Exhaust turbocharging 23 Fuel injection - Mechanical 24 Fuel system - Electronic ignition 26 Exhaust system 27 Starter, power supply, cruise control 28 Ignition system – Transmission, Clutch 3X Power transmission – General * 30 Clutch control 32 Automatic clutch - Torque converter 34 Mechanical gear-shift system - Actuation, housing 35 Mechanical gear-shift system - Gears & shafts 37 Automatic transmission - Actuation, assembly housing 38 Automatic transmission - Gears, control 39 Final drive, differential, differential lock – Chassis, Front Axle, Rear Axle, Brakes, Steering 4X Chassis – General * 40 Front wheel suspension, drive shafts 42 Rear wheel suspension, drive shafts 43 Level control, air suspension, damper control 44 Wheels, tires, suspension & alignment 45 Anti blocking system (ABS) 46 Brakes - Brakes mechanical 47 Brakes - Hydraulic brake system, regulator 48 Steering – Body Equipment, Exterior 6X Body equipment, exterior – General * 60 Sliding roof, tilting roof 61 Hardtop, cabriolet 63 Bumpers 64 Glazing, window control 66 Exterior equipment 68 Interior equipment 69 Passenger protection – Body Equipment, Interior 7X Body equipment, interior – General * 70 Linings, insulation 72 Seat frames 74 Seat upholsteries, covers – Heating, Ventilation, Air Conditioner 8X Air conditioning – General * 80 Heating 82 Auxiliary heating 85 Ventilation 87 Air conditioning 88 Auxiliary air conditioning system – Electrical System 9X Electrical – General * 90 Instruments 91 Radio, stereo, telephone, on-board computer 92 Windshield wiper and washer system 94 Lights, lamps, switches, exterior 96 Lights, lamps, switches, interior 97 Cables L – Paintwork * Denotes Workshop Manual and/or Labor Operations Page iv 9x1 Body & Structural Repair P52 Section 5-13_Sect-3.qxd 5/8/13 8:22 AM Page Vehicle Introduction Subject Page 911 (991) Vehicle Introduction General Information Chassis Body 12 Aerodynamics 15 Slide/Tilt Roof 16 Exterior Mirrors 16 Body Views 18 Occupant Protection 19 Luggage Compartments & Storage Options 22 Interior Equipment 24 Boxster (981) Vehicle Introduction 30 Body 31 Aerodynamics 33 Lids and Flaps 33 Cayman (981) Vehicle Introduction 35 Body 36 Contact Corrosion 37 Repair Concept 39 Aerodynamics 40 Lids and Flaps 41 9x1 Body & Structural Repair Page 1.1 P52 Section 5-13_Sect-3.qxd 5/8/13 8:22 AM Page 911 (991) Vehicle Introduction Model – 911 (991) Vehicle Data Label Vehicle identification label is on the inside of the maintenance book It Contains all important data about your car This label contains the following information: ● Vehicle Identification Number (VIN) Vehicle code ● Engine and transmission code ● Paint Code/Interior Code ● Option codes ● The Engine Number (4) The engine number is stamped on crankcase as shown above Tire Pressure (3) Tire pressure label is on the left driver side door lock plate Vehicle Identification Number (1) In accordance with Federal Safety Regulations, the vehicle identification number of your car is located at the bottom left of the windshield frame and can be seen from the outside Vehicle Identification Number (2) The vehicle identification number is also under the front passenger seat Transmission Number Refer to Repair Manual for location Paint Data The paint data is included on the Vehicle Data Label Page 1.2 Safety Compliance Sticker (3) The safety compliance sticker is your assurance that your new Porsche complies with all applicable Federal Motor Vehicle Safety Standards which were in effect at the time the vehicle was manufactured This sticker also shows the month and year of production and the vehicle identification number of your car (perforations) as well as the Gross Vehicle Weight Rating and the Gross Axle Weight Rating 9x1 Body & Structural Repair P52 Section 5-13_Sect-3.qxd 5/8/13 8:22 AM Page 911 (991) Vehicle Introduction General Information Cooling System Two different engines are available for the 911 Carrera (991) The standard models come with an engine where the displacement has been reduced (to 3.4 liters from the previous 3.6 liters) but the high torque of the previous engine has been retained and the power increased further This has been made possible by increasing the nominal rpm from 6,500 rpm to 7,400 rpm The S models still come with a 3.8-liter engine Here the power has been increased by 15 hp to 400 hp (294 kW) As with the 3.4-liter engine, the nominal rpm have been increased to 7,400 rpm (+ 900 rpm) and the maximum engine speed has been increased to 7,800 rpm (+ 300 rpm) The maximum torque is now 440 Nm (+ 20 Nm) The coolant expansion tank is located in the service opening under the engine compartment lid, on the left in the direction of travel There are two caps on the tank, both of which are black for reasons of appearance The left-hand cap is for coolant, while the right-hand cap is used as an oil filler opening The caps themselves are identified with appropriate symbols The two threads are different to avoid interchanging The red ball indicates the current coolant level This ball must be in the area between the and max markings when the engine is cold and the vehicle is positioned horizontally The coolant quantity can vary between 30.3 and 32 qts (28.7 and 30.3 liters) depending on equipment 9x1 Body & Structural Repair Page 1.3 P52 Section 5-13_Sect-3.qxd 5/8/13 8:22 AM Page 911 (991) Vehicle Introduction Development Goals for the Engine The characteristics that are typical of the 911 Carrera, such as superior driving dynamics and performance combined with low fuel consumption, low CO2 emissions and exceptional day-to-day usability, have been further improved Increase in engine power (compared to 2nd Gen 997): • + hp for the 911 Carrera (3.4-liter) • + 15 hp and + 20 Nm for the 911 Carrera S (3.8-liter) Reduced fuel consumption and emission values: • Reduced by to 15%, depending on the model • Fuel consumption and emission values on the 3.4-liter Carrera with Porsche Doppelkupplung (PDK), for example, have been reduced by 15% In addition to direct fuel injection (DFI), which was introduced to sports cars with the 911 Carrera (997) and has already allowed improvements in fuel economy compared with the previous models, the new flat-six engines feature the following new technologies: • Thermal management for engine, transmission and heating • Auto Start Stop function • Variable deceleration fuel cutoff • Vehicle electrical system recuperation (- 0.1 liters in NEDC - New European Driving Cycle) • Displacement downsizing on the 911 Carrera (- 0.2 liters) • Coasting in conjunction with 7-speed Porsche Doppelkupplung (PDK) • 7-speed manual transmission (+ gear) • Electromechanical power steering (- 0.1 liters) Performance/driving dynamics: • Sport button as standard • Sport Chrono package incl dynamic engine mountings (optional) Notes: Page 1.4 9x1 Body & Structural Repair P52 Section 5-13_Sect-3.qxd 5/8/13 8:25 AM Page 12 Approved Bench Systems Page 2.12 9x1 Body & Structural Repair P52 Section 5-13_Sect-3.qxd 5/8/13 8:25 AM Page 13 Approved Bench Systems 9x1 Body & Structural Repair Page 2.13 P52 Section 5-13_Sect-3.qxd 5/8/13 8:25 AM Page 14 Approved Bench Systems Notes: Page 2.14 9x1 Body & Structural Repair P52 Section 5-13_Sect-3.qxd 5/20/13 11:02 AM Page Structural Repair Subject Page General Information 911 Carrera (991) Body Structure Boxster (981) Body Structure Cayman (981) Body Structure Steel & Aluminum Connections Self-piercing Rivets Clinched Joints Flow Drill Screws Resistance Spot Welding & MIG Welding Structural Bonding Repair Concept Aluminum to Steel Repairs Connecting Elements 9x1 Body & Structural Repair Page 3.1 P52 Section 5-13_Sect-3.qxd 5/20/13 11:02 AM Page Structural Repair The weight savings was achieved by the use of lightweight materials such as cast, extruded and sheet aluminum Additionally, advanced steels such as ultra-high strength boron alloyed steel, which is 2-3 times stronger than mild steel, contribute to the strength and light weight of the body shell Another benefit of lightweight construction is the effect on weight distribution in the vehicle This has a direct influence on acceleration and driving dynamics; also on safety characteristics such as braking distance and driving stability General Information The 991 model line marks a further milestone in the development of modern Porsche vehicle body shell construction The body shell weighs 14% less than the predecessor model line The crash safety of the body is assured by carefully designed structures in all areas of the vehicle Additionally, the body is designed to meet European legislative requirements for pedestrian protection As a result of the lightweight construction, the overall body shell weight of 644 lbs (292 kg) with attachment parts or 549 lbs (249 kg) without doors and lids is considerably less than a similarly sized all steel body shell Notes: Page 3.2 9x1 Body & Structural Repair P52 Section 5-13_Sect-3.qxd 5/20/13 11:11 AM Page 911 Carrera (991) Structural Repair 9x1 Body & Structural Repair Page 3.3 P52 Section 5-13_Sect-3.qxd 5/20/13 11:02 AM Page Boxster (981) Structural Repair Page 3.4 9x1 Body & Structural Repair P52 Section 5-13_Sect-3.qxd 5/20/13 11:02 AM Page Cayman (981) Structural Repair 9x1 Body & Structural Repair Page 3.5 P52 Section 5-13_Sect-3.qxd 5/20/13 11:02 AM Page Structural Repair The following measures ensure corrosion protection in the 991 model line: Steel and Aluminum Connections An engineering challenge presented by the 991 model line was the joining of the primarily aluminum floor pan assembly with the steel superstructure Traditionally, automobile bodies are assembled with welding processes, primarily resistance spot welding, and to a lesser extent, MIG / MAG welding However, these processes aren’t practical for aluminum to steel connections, both for reasons of strength and corrosion protection Steel to aluminum connections, if not protected, can be subject to a higher rate of corrosion than purely steel or aluminum connections Corrosion that occurs between dissimilar metals is known as galvanic corrosion, and can also be called contact corrosion Thus, insulation of the dissimilar materials is of paramount concern both in production and the AfterSales area • Coating of all steel screws and fasteners such as selfpiercing rivets and high-strength blind rivets used in AfterSales • Galvanization of all steel sheet components (zinc and aluminum have a lower potential difference than steel and aluminum) • Electrochemical insulation by adhesive sealing of aluminum to steel joints Joining Techniques Used In Production Technique Mechanical joining Self-piercing rivet Thermal joining In the 991 model line, galvanic corrosion is prevented through the use of coated self-piercing rivets and special screws in combination with adhesive bonding; however it is the adhesive that provides the majority of the corrosion protection As an additional protection, all aluminum to steel joints are either additionally sealed with PVC and or wax preservation after electrophoretic dip priming (E-coat) Galvanic Corrosion Quantity per vehicle 1443 each Flow drill screw 177 each Clinched joint 416 each MAG weld 17.8 ft (5426 mm) MIG weld 13.15 ft (4009 mm) Resistance spot weld 3499 each Welded studs Adhesive bonding Bonding Aluminum is very resistant to corrosion due to a naturally occurring layer of oxide on the surface When bare aluminum is exposed to an oxygen rich environment, a process called passivation occurs Passivation is the spontaneous formation of a thin, protective oxide film which limits the potential for further corrosion This explains why unpainted aluminum normally does not corrode However, aluminum to steel joints can be subject to galvanic corrosion For this to occur, two conditions must be met Firstly the aluminum and steel must be in contact with each other Secondly, there must be an electrically conductive path between the two metals, such as created by the presence of water When this takes place, the aluminum is attacked and is damaged because it is the baser metal The only defense against galvanic corrosion is to prevent current flow between the two metals The most elementary type of protection would be to paint the two surfaces However, paint damage so small that it’s not visible to the human eye could lead to this type of corrosion Page 3.6 Method 9x1 Body & Structural Repair 206 each 429.8 ft (131 m) P52 Section 5-13_Sect-3.qxd 5/20/13 11:02 AM Page Structural Repair of the flange material This joining technique doesn’t produce as strong a connection as self-piercing riveted joints, therefore is only used in low stress areas The clinching process is also ideal for joining dissimilar materials In the AfterSales area, clinched joints are replaced with the previously mentioned high-strength blind rivets Self-piercing Rivets Flow Drill Screws Self-piercing rivets offer many benefits in body shell production: • Excellent fastening system for joining dissimilar materials • Pierce and fasten in one operation, eliminating need for insertion holes and alignment • No heat affected zone created in the assembly process • Provides consistent, high joint strength comparable to spot welds • Clean assembly process - no fumes, sparks or swarf generated in joining process • Self-sealing: rivet radially expands into material, without breaking through substrate In the AfterSales area, high-strength blind rivets of varying grip ranges are used These special rivets are supplied via the parts department Clinched Joints Flow drill screws are used for the first time in the production of Porsche vehicles These connections are particularly advantageous to the production process; no preparation is necessary (e.g drilled or threaded holes), the installation process is fast with no material waste or swarf as a byproduct The flow drill screw is driven into the material to be joined under high contact pressure and at high speed As a result, the material is softened, a thread is formed and the screw is tightened In the AfterSales area, flow drilled screws can be removed and replaced with new screws If the threads are damaged, larger size screws can be substituted (M6 instead of M5) Predrilling may be necessary when installing new parts; the relevant work instructions should be followed In the clinching process, a positive and frictional interlock is produced by partial shearing and subsequent upsetting 9x1 Body & Structural Repair Page 3.7 P52 Section 5-13_Sect-3.qxd 5/20/13 11:02 AM Page Structural Repair Resistance Spot Welding and MIG Welding Repair Concept The steel components of the body shell are repaired with commonly known processes such as resistance spot welding and to a lesser extent, Metal Inert Gas welding (MIG welding) Reshaping of the body structure of the 991 model line with a straightening bench using pulling and or pressure devices is not permitted Straightening can cause irreparable damage to the joints in the body shell structure Also, straightening can change the crash properties of the body shell structure The damaged components should be cut off and replaced without any straightening operations When replacing steel parts, resistance spot welding must be carried out using only equipment approved by Porsche AG Otherwise, the strength of the body shell will be otherwise impaired and consequential damage can occur Visual inspection of resistance spot welds cannot determine quality The only valid test of a resistance spot weld is the so called “destructive test” where the two sheets are torn apart in order to assess the remaining weld nugget size However, this test is impossible to carry out once a replacement component is joined to the vehicle Therefore, test welds must be carried out beforehand on the metal scraps from the vehicle being repaired Porsche AG has not published weld nugget size requirements, so industry standards should be used in evaluating test welds There is no provision for aluminum welding in the 991 model line repair concept Structural Bonding In conjunction with the self-piercing rivet, clinch and flow drilled screw connections; adhesive bonding is used for strength, NVH (noise, vibration and harshness) reasons, and insulation of dissimilar materials in certain areas The material used in body shell production is Sikapower 498 However, this is one part material is not suitable for the AfterSales area; rather the two component Betamate 2096 provided by the parts department is used for repairs Important! > See workshop manual document “WM 5X00IN Information on aluminum repairs” for more information Increasingly stringent safety requirements and the development objective of increased stability along with decreased vehicle mass have demanded that materials with the highest- strength characteristics are used in the 991 model series These ultra-high-strength steels are used for safety components such as A and B pillars, roof frame and door sills However, this extremely high strength impairs the standard body repair processes of reshaping, machining and welding Generally, repairs to the steel components are similar to purely steel vehicles Great care must be taken to avoid causing galvanic corrosion to the aluminum parts as a result of cutting and grinding operations Dust produced by grinding and flying sparks must not be allowed to fall onto aluminum parts, whether bare or painted If at all possible, cutting work should be done using a body saw rather than a cut off wheel or grinder When spark producing work is unavoidable, every effort should be made to reduce the sparks as much as possible Aluminum to Steel Repairs There are cases when both aluminum and steel parts may be damaged, for example the rear side member and outer wheel house After removing the damaged parts, the genuine replacement parts must be installed according to the workshop manual instructions While doing so, extreme care must be taken to exclude the possibility of future galvanic corrosion Page 3.8 9x1 Body & Structural Repair P52 Section 5-13_Sect-3.qxd 5/20/13 11:02 AM Page Structural Repair Damage Diagnosis Higher-strength and ultra-high-strength steel components may only be replaced as complete parts Partial replacement is not permitted on the basis of safety reasons Due to the inherent rigidity of this metal, only very limited repairs are possible Connecting Elements If the threads in any of the cast aluminum parts become stripped out or otherwise damaged, there are five different repair sets available for service, all threads are accounted for Each Porsche dealer has these tools on hand Welded studs, such as for ground connections and miscellaneous parts such as wiring harnesses and underbody panels are replaced with riveted studs and or riveted nuts, depending on the component Refer to the work instructions in the Workshop Manual for the exact replacement procedure Front Section Rear Section Due to the material characteristics, cast aluminum parts cannot be repaired In the 991 model line, cast aluminum parts that have a deviation of +/- 2mm and the measuring points or other visible damage must be replaced The relevant measuring points are called out with arrows in the accompanying images Other aluminum components can be repaired to a limited extent The factors involved are the type of aluminum (hardness, sheet or extrusion) and the damage present Heating aluminum parts to approximately 176° F (80° C) prior to attempting repairs can increase the likelihood of success Components that develop cracks, notches or kinks have lost strength in those areas and therefore must be replaced If there is any suspicion that cracks could be present in any aluminum part, a dye penetrant test should be carried out on the suspected area If the part is cracked, it must be replaced 9x1 Body & Structural Repair Page 3.9 P52 Section 5-13_Sect-3.qxd 5/20/13 11:02 AM Page 10 Structural Repair Notes: Page 3.10 9x1 Body & Structural Repair P52 Cover 5-13_Layout 5/8/13 8:21 AM Page Part Number - PNA P52 004 Edition - 2/15 ... on and off and activates and deactivates coasting mode 9x1 Body & Structural Repair P52 Section 5-13_Sect-3.qxd 5/8/13 8:22 AM Page 911 (991) Vehicle Introduction During coasting, the kinetic and. .. unpainted bodyshell Page 1.12 9x1 Body & Structural Repair P52 Section 5-13_Sect-3.qxd 5/8/13 8:22 AM Page 13 911 (991) Vehicle Introduction The unpainted bodyshell consists of the main bodyshell and. .. additional 10 mm and mechanical/ electronic rear differential lock) 9x1 Body & Structural Repair P52 Section 5-13_Sect-3.qxd 5/8/13 8:22 AM Page 11 911 (991) Vehicle Introduction Power Steering Porsche