2008-2010 Subaru Impreza WRX & STI Factory Workshop Service Repair Manual

FW-2 Foreword FOREWORD 1. Foreword A: FOREWORD These manuals are used when performing maintenance, repair or diagnosis of Subaru IMPREZA. Applicable model: 2009MY GE*****, GH***** The manuals contain the latest information at the time of publication. Changes in the specifications, methods, etc. may be made without notice.

HU-2 How to Use This Manuals HOW TO USE THIS MANUALS 1. How to Use This Manuals A: HOW TO USE THIS MANUALS 1. STRUCTURE Each section consists of SCT that are broken down into SC that are divided into sections for each component. The specification, maintenance and other information for the components are included, and the diagnostic information has also been added where necessary. 2. CONTENTS The first page has an index with tabs.

HU-3 How to Use This Manuals HOW TO USE THIS MANUALS 3. COMPONENT Illustrations are provided for each component. The information necessary for repair work (tightening torque, grease up points, etc.) is described on these illustrations. Information is described using symbol. To order parts, refer to parts catalogue. Example: HU-00017 (14) (9) (8) (7) (6) (10) (4) (10) (22) (11) (19) (17) (15) (13) (12) (18) (16) (1) (2) (3) (4) (5) (6) (7) (8) (11) (10) (9) (12) (13) (19) (18) (20) (17) (16) (24) (10) (25) (5) (4) (4) (4) (3) (3) (3) (2) (1) (21) (15) (23) T7 T2 T2 T2 T2 T2 T2 T4 T5 T5 T8 T6 T6 T6 T11 T10 T1 T1 T3 T3 T3 T1 T9 T4 T5 T5 T3 T4 T3 T2 T4 T2 T1 T3 (20) (21) (23) (22) (10) (24) (25) (26) (35) (34) (27) (14) (28) (29) (31) (32) (37) (30) (33) (36) T3 T2 T1 .... , : Selective part : Replacement part : Sealing point : Should be lubricated with oil. : Should be lubricated with grease. : Tightening torque

HU-4 How to Use This Manuals HOW TO USE THIS MANUALS 4. SPECIFICATION If necessary, specifications are also included. 5. INSPECTION Inspections to be carried out before and after maintenance are included. 6. MAINTENANCE • Maintenance instructions for serviceable parts describe work area and detailed step with illustration. It also describes the use of special tool, tightening torque, caution for each procedure. • If many serviceable parts are included in one service procedure, appropriate reference is provided for each parts. Example: (A) Component (D) Cautions (G) Tightening torque (B) Process (E) Tool number of special tool (H) Illustration (C) Reference (F) Name of special tool HU-00041 1) Remove the manual transmission assembly from vehicie. <Ref. to MT-33, REMOVAL, Manual Transmission Assembly.> 15.Main Shaft A: REMOVAL 11) Tighten the lock nuts to the specified torque using ST1 and ST2. NOTE: Secure the lock nuts in two places after tightening. ST1 498937000 TRANSMISSION HOLDER (A) (B) (C) (D) (G) (E) (F) (H) Tightening torque: 120 N m (12.2 kgf-m, 88.5 ft-lb) ST1 ST2 ST2 499987003 SOCKET WRENCH (35)

HU-5 How to Use This Manuals HOW TO USE THIS MANUALS 7. DIAGNOSIS Tables showing a step-by-step process make it easy to conduct diagnosis. 8. SI UNITS Measurements in these manuals are according to the SI units. Metric and yard/pound measurements are also included. Example: Tightening torque: 45 N·m (4.6 kgf-m, 33.2 ft-lb)

HU-6 How to Use This Manuals HOW TO USE THIS MANUALS 9. EXPLANATION OF TERMINOLOGY • List AAI : Air Assist Injection HID : High-Intensity Discharge AAR : Angular Adjusted Roller H/U : Hydraulic Unit A/B : Airbag IG : Ignition ABS : Anti-lock Brake System IN : Intake A/C : Air Conditioner INT : Intermittent AC : Angular Contact I/O : Input / Output ACC : Accessory ISC : Idle Speed Control A/F : Air Fuel Ratio LAN : Local Area Network ALT : Generator LCD : Liquid Crystal Display ASSY : Assembly LED : Light Emitting Diode AT : Automatic Transmission LH : LH (Left Hand) ATF : Automatic Transmission Fluid LSD : Limited Slip Differential AVCS : Active Valve Control System M/B : Main Fuse & Relay Box AWD : All Wheel Drive MFI : Multi Point Injection BATT : Battery MP-T : Multi-Plate Transfer BJ : Bell Joint MT : Manual Transmission CAN : Controller Area Network NA : Natural Aspiration CD : Compact Disc OP : Option Parts COMPL : Complete OBD : On-Board Diagnosis CPU : Central Processing Unit P/S : Power Steering DOHC : Double Overhead Camshaft P/W : Power Window DTC : Diagnosis Trouble Code PCV : Positive Crankcase Ventilation DOJ : Double Offset Joint PID : Parameter Identification DVD : Digital Versatile Disc or Digital Video Disc RAM : Random Access Memory EBD : Electronic Brake Distribution RH : RH (Right Hand) EBJ : High-efficiency Compact Ball Fixed Joint ROM : Read Only Memory EDJ : High-efficiency Compact Double Offset Joint rpm : Revolution Per Minute ECM : Engine Control Module SOHC : Single Overhead Camshaft EGI : Electronic Gasoline Injection SRS : Supplemental Restraint System E/G : Engine SSM : Subaru Select Monitor EGR : Exhaust Gas Recirculation ST : Special Tool EX : Exhaust SW : Switch ETC : Electronic Throttle Control TGV : Tumble Generator Valve F/B : Fuse & Joint Box VDC : Vehicle Dynamics Control FWD : Front Wheel Drive V.I.N. : Vehicle Identification Number GPS : Global Positioning System VTD : Variable Torque Distribution

SPC-2 Impreza SPECIFICATIONS 1. Impreza A: DIMENSION B: ENGINE C: ELECTRICAL Model 4 door 5 door OUTBACK Overall length mm (in) 4,580 (180.3) 4,415 (173.8) Overall width mm (in) 1,740 (68.5) Overall height (at C.W.) mm (in) 1,475 (58.1) 1,480 (58.3) Compartment Length mm (in) 1,985 (78.1) Width mm (in) 1,475 (58.1) Height mm (in) Model without sunroof : 1,200 (47.2) Model with sunroof : 1,170 (46.1) Wheelbase mm (in) 2,620 (103.1) Tread Front mm (in) 1,495 (58.9) 1,490 (58.7) Rear mm (in) Non-turbo model: 1,495 (58.9) Turbo mode (205 tire) l: 1,500 (59.1) Turbo mode (225 tire) l: 1,505 (59.3) 1,495 (58.9) Minimum road clearance mm (in) 155 (6.1) 160 (6.3) Model 2.5 L Turbo 2.5 L turbo (WRX-SS model) 2.5 L Engine type Horizontally opposed, liquid cooled, 4-cylinder, 4-stroke gasoline engine Valve arrangement DOHC SOHC Bore × stroke mm (in) 99.5 × 79.0 (3.92 × 3.11) Displacement cm 3 (cu in) 2,457 (149.94) Compression ratio 8.4 10.0 Ignition order 1 — 3 — 2 — 4 Idle speed at Park or Neutral position rpm 700 MT: 650 AT: 700 Maximum output kW (HP)/rpm 167 (224)/5,200 198 (265)/6,000 127 (170)/6,000 Maximum torque N·m (kgf-m, ft-lb)/rpm 307 (31.3, 226)/2,800 330 (33.7, 244)/4,000 230 (23.5, 170)/4,400 Model 2.5 L Turbo 2.5 L Ignition timing (at idling) BTDC MT: 12° 10° AT: 17° 10° MT: 10° 8° AT: 15° 10° Spark plug Type and manufacturer NGK: SILFR6A NGK: FR5AP-11 Generator 12 V — 110 A 12 V — 90 A Battery Type and capacity (5HR) AT: 12 V — 52 AH (65D23L) MT: 12 V — 48 AH (55D23L)

SPC-3 Impreza SPECIFICATIONS D: TRANSMISSION 5MT: 5-forward speeds, 1-reverse 4AT: Electronically controlled fully-automatic, 4-forward speeds and 1-reverse DSPD: Dry Single Plate Diaphragm TCC: Torque Converter Clutch E: STEERING F: SUSPENSION G: BRAKE H: TIRE Model 2.5 L Turbo 2.5 L Transmission type 5MT 4AT 5MT 4AT Clutch type DSPD TCC DSPD TCC Gear ratio 1st 3.166 2.785 3.454 2.785 2nd 1.882 1.545 2.062 1.545 3rd 1.296 1.000 1.448 1.000 4th 0.972 0.694 1.088 0.694 5th 0.738 — 0.780 — 6th — — — — Rev. 3.333 2.272 3.333 2.272 Reduction gear (Front) 1st reduction Type of gear — Helical — Helical Gear ratio — 1.000 — 1.000 Final reduction Type of gear Hypoid Hypoid Hypoid Hypoid Gear ratio 3.900 3.900 3.900 4.111 Reduction gear (Rear) Transfer reduction Type of gear Helical — Helical — Gear ratio 1.000 — 1.000 — Final reduction Type of gear Hypoid Hypoid Hypoid Hypoid Gear ratio 3.900 3.900 3.900 4.111 Model 2.5i, OUTBACK WRX, 2.5 GT WRX-SS Type Rack and pinion Turns, lock to lock 2.8 Minimum turning diameter m (ft) Curb to curb 10.6 (34.8) 10.8 (35.5) Wall to wall 11.2 (36.7) 11.4 (37.4) Front Macpherson strut type suspension Rear Double-wishbone type suspension Model 2.5 i OUTBACK, WRX, 2.5 GT, WRX-SS Service brake system Dual circuit hydraulic with vacuum suspended power unit Front Ventilated disc brake Rear Drum brake (OP: Disc brake) Disc brake Parking brake Mechanical on rear brakes Model 2.5 i OUTBACK, WRX, 2.5 GT WRX-SS Rim size 16 × 6 1 / 2 JJ 17 × 7JJ Tire size P205/55R16 89V P205/50 R17 88V 225/45 R17 91W Type Tubeless, Steel belted radial

SPC-4 Impreza SPECIFICATIONS I: CAPACITY Model 2.5 L Turbo 2.5 L 5MT 4AT 5MT 4AT Fuel tank 2 (US gal, Imp gal) 64 (16.9, 14.1) Engine oil Capacity (at overhaul) 2 (US qt, Imp qt) 5.0 (5.3, 4.4) When replacing engine oil and oil filter 2 (US qt, Imp qt) 4.2 (4.4, 3.7) When replacing engine oil only 2 (US qt, Imp qt) 4.0 (4.2, 3.5) Transmission gear oil 2 (US qt, Imp qt) 3.5 (3.7, 3.1) — 3.5 (3.7, 3.1) — ATF 2 (US qt, Imp qt) — 9.3 — 9.6 (9.8 — 10.1, 8.2 — 8.4) — 9.3 — 9.6 (9.8 — 10.1, 8.2 — 8.4) Front differential gear oil 2 (US qt, Imp qt) — 1.1 — 1.3 (1.2 — 1.4, 1.0 — 1.1) — 1.1 — 1.3 (1.2 — 1.4, 1.0 — 1.1) Rear differential gear oil 2 (US qt, Imp qt) 0.8 (0.8, 0.7) Power steering fluid 2 (US qt, Imp qt) 0.7 (0.7, 0.6) Engine coolant 2 (US qt, Imp qt) 7.5 (7.9, 6.6) 7.4 (7.8, 6.5) 6.8 (7.2, 6.0) 6.7 (7.1, 5.9)

SPC-5 Impreza SPECIFICATIONS J: WEIGHT Model 4 door SOHC 2.5 i MT AT OP code U4 U4 U4 U4 U4 C0 U4 U4 U4 U4 FW NF IZ IO VO NF FW NF IZ IO Curb weight (C.W.) Total kg (lb) 1,390 (3,064) 1,395 (3,075) 1,385 (3,053) 1,405 (3,097) 1,405 (3,097) 1,395 (3,075) 1,420 (3,130) 1,425 (3,141) 1,415 (3,119) 1,435 (3,163) Front kg (lb) 780 (1,719) 780 (1,719) 775 (1,708) 785 (1,730) 785 (1,730) 780 (1,719) 810 (1,785) 810 (1,785) 805 (1,774) 815 (1,796) Rear kg (lb) 610 (1,345) 615 (1,356) 610 (1,345) 620 (1,367) 620 (1,367) 615 (1,356) 610 (1,345) 615 (1,356) 610 (1,345) 620 (1,367) Gross vehicle weight (G.V.W.) kg (lb) 1,950 (4,299) 1,950 (4,299) 1,950 (4,299) 1,950 (4,299) 1,950 (4,299) 1,950 (4,299) 1,950 (4,299) 1,950 (4,299) 1,950 (4,299) 1,950 (4,299) Gross axle weight (G.A.W.) Front kg (lb) 990 (2,183) 990 (2,183) 990 (2,183) 990 (2,183) 990 (2,183) 990 (2,183) 990 (2,183) 990 (2,183) 990 (2,183) 990 (2,183) Rear kg (lb) 1,000 (2,205) 1,000 (2,205) 1,000 (2,205) 1,000 (2,205) 1,000 (2,205) 1,000 (2,205) 1,000 (2,205) 1,000 (2,205) 1,000 (2,205) 1,000 (2,205) Option Aluminum wheel — — — — — Cruise control Leather package — — — — — Genuine leather seat — — — — — — — — — — High grade audio — — — — — — Navigation — — — — — — — — — Satellite tuner — — — — — — — — — Rear disc brake — — Satellite SW — — — — — Side airbag Curtain airbag VDC — — Front fog light — — — — — Cold weather package — — — — — — — — — — Sunroof — — — — — — — Spare tire (standard) — — — — — — — — — —

2008-2010 Subaru Impreza WRX & STI Factory Workshop Service Repair Manual

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