2006-2007 Subaru Impreza 2.5i wrx STI Repair Service manual
What's Included?
Lifetime Access
Fast Download Speeds
Offline Viewing
Access Contents & Bookmarks
Full Search Facility
Print one or all pages of your manual
POWER ASSISTED SYSTEM
(POWER STEERING)
PS-2
POWER ASSISTED SYSTEM (POWER STEERING)
General Description
1. General Description
A: SPECIFICATION
Model
NON-TURBO TURBO
2.5i, OUTBACK WRX STI
Whole system
Minimum turning radius m (ft) 5.4 (17.7) 5.7 (18.7)
Steering angle (Inside-Outside) 34.5° — 30.3° 32.9° — 28.5°
Steering wheel diameter mm (in) 375 (14.76) 375 (14.76)
Lock-to-lock speed (Turns lock to lock,
Gear box)
3.0 2.7 2.6
Gearbox
Type Rack and pinion, Integral
Backlash 0 (Automatically adjustable)
Valve (Power steering system) Rotary valve
Pump
(Power steering
system)
Type Vane pump
Oil tank Installed on body
Output
cm
3
(cu in)/rev.
7.2 (0.439) 7.2 (0.439)
Relief pressure
kPa (kgf/cm
2
, psi)
6,700 — 7,400
(68 — 75, 972 — 1,073)
7,350 — 8,036
(75 — 82, 1,067 — 1,165)
Hydraulic fluid control Dropping in response to increased engine revolutions
Hydraulic fluid 2 (US qt, Imp qt)
1,000 rpm: 7 (7.4, 6.2)
3,000 rpm: 5 (5.3, 4.4)
7.5 (7.9, 6.6)
Range of revolution rpm 700 — 9,000
Revolving direction Clockwise
Working fluid
(Power steering
system)
Name ATF DEXRON III
Capacity Oil tank 0.3 (0.3, 0.3)
2 (US qt, Imp qt) Total 0.7 (0.7, 0.6)
PS-3
POWER ASSISTED SYSTEM (POWER STEERING)
General Description
Steering wheel Free play mm (in) 17 (0.67)
Turning angle
Inner wheel
2.5i, OUTBACK, WRX 34.5°±1.5°
STI 32.9°±1.5°
Outer wheel
2.5i, OUTBACK, WRX 30.3°±1.5°
STI 28.5°±1.5°
Steering shaft
Clearance between steering wheel and
column cover
mm (in) 4.0 (0.16)
Steering gear-
box
(Power steer-
ing system)
Sliding resistance N (kgf, lbf) 400 (41, 90) or less
Rack shaft
play in radial
direction
Right-turn steering mm (in) 0.19 (0.0075) or less
Left-turn steering mm (in)
Horizontal movement:
0.15 (0.0059) or less
Vertical movement:
0.3 (0.012) or less
Input shaft
play
In radial direction mm (in) 0.18 (0.0071) or less
In axial direction mm (in) 0.5 (0.020) or less
Turning resistance N (kgf, lbf)
Maximum allowable value:
Less than 10.5 (1.1, 2.4)
Difference between right and left
sliding resistance: Less than 20%
Oil pump
(Power steer-
ing system)
Pulley shaft
Radial play mm (in) 0.4 (0.016) or less
Axial play mm (in) 0.9 (0.035) or less
Pulley
Ditch deflection mm (in) 1.0 (0.039) or less
Resistance to rotation N (kgf, lbf) 9.22 (0.94, 2.07) or less
Regular pressure (Unloaded)
kPa (kgf/cm
2
, psi)
981 (10, 142) or less
Steering wheel
effort
(Power steer-
ing system)
At standstill with engine idling on a
concrete road
N (kgf, lbf) 31.4 (3.2, 7.1) or less
At standstill with engine stalled on a
concrete road
N (kgf, lbf) 294.2 (30, 66.2) or less
Recommended power steering fluid Manufacturer
ATF DEXRON III
B.P.
CALTEX
CASTROL
MOBIL
SHELL
TEXACO
PS-4
POWER ASSISTED SYSTEM (POWER STEERING)
General Description
B: COMPONENT
1. STEERING WHEEL AND COLUMN
(1) Bushing (5) Steering wheel Tightening torque: Nâ‹…m (kgf-m, ft-lb)
(2) Steering shaft (6) Airbag module T1: 1.2 (0.12, 0.9)
(3) Steering roll connector (7) Steering wheel lower cover T2: 25 (2.5, 18.1)
(4) Column cover T3: 45 (4.6, 33.2)
PS-00618
(2)
(4)
T2
T1
(3)
(1)
T3
(6)
(5)
(7)
PS-5
POWER ASSISTED SYSTEM (POWER STEERING)
General Description
2. POWER ASSISTED SYSTEM
• NON-TURBO MODEL
PS-00645
T1
T11
T13
T10
T5
T15
T4
T14
T4
T14
T15
T10
T13
(18)
(19)
(19)
(19)
T5
T9
T9
T8
T8
T1
T4
T2
T2
T3
T6
T7
T9
T9
T2
T12
(10)
(9)
(4)
(4)
(4)
(1)
(6)
(58)
(57)
(8)
(12)
(15)
(13)
(14)
(16)
(5)
(2) (3)
T4
(11)
(38)
(36)
(39)
(40)
(41)
(42)
(43)
(44)
(45)
(46)
(47)
(56)
(55)
(54)
(49)
(53)
(52)
(46)
(45)
(44)
(37)
(43)
(42)
(41)
(40)
(23)
(24)
(25)
(26)
(27)
(38)
(39)
(21)
(22)
(20)
(17)
(19)
(36)
(28)
(29)
(31)
(47)
(30)
(50)
(35)
(34) (33)
(32)
(37)
(51)
(48)
(7)
(7)
T12
PS-6
POWER ASSISTED SYSTEM (POWER STEERING)
General Description
(1) Eye bolt (26) Seal ring (51) Oil seal
(2) Pipe C (27) Pinion and valve ASSY (52) Piston ring
(3) Gasket (28) Oil seal (53) Rack
(4) Clip (29) Back-up washer (54) Rack bushing
(5) Pipe D (30) Ball bearing (55) Rack stopper
(6) Clamp E (31) Snap ring (56) Snap ring
(7) O-ring (32) Lock nut (57) Suction hose
(8) Cap (33) Adjusting screw (58) Hose
(9) Reservoir tank (34) Spring
(10) Reservoir tank bracket (35) Sleeve Tightening torque: Nâ‹…m (kgf-m, ft-lb)
(11) Pulley (36) Adapter T1: 6 (0.6, 4.3)
(12) Oil pump (37) Clamp T2: 7.4 (0.75, 5.4)
(13) Bracket (38) Cotter pin T3: 8 (0.8, 5.8)
(14) Belt tension nut (39) Castle nut T4: 13 (1.3, 9.4)
(15) Bushing (40) Dust cover T5: 15 (1.5, 10.8)
(16) Belt cover (41) Clip T6: 15.7 (1.6, 11.6)
(17) Pipe E (42) Tie-rod end T7: 22 (2.2, 15.9)
(18) Pipe F (43) Clip T8: 24 (2.4, 17.4)
(19) Clamp plate (44) Boot T9: 25 (2.5, 18.1)
(20) Universal joint (45) Band T10: 27 (2.75, 19.9)
(21) Dust seal (46) Tie-rod T11: 37.3 (3.8, 27.5)
(22) Valve housing (47) Lock washer T12: 40 (4.1, 29.5)
(23) Gasket (48) Pipe B T13: 60 (6.1, 44.3)
(24) Oil seal (49) Pipe A T14: 78 (8.0, 57.9)
(25) Ball bearing (50) Steering body T15: 83 (8.5, 61.5)
PS-7
POWER ASSISTED SYSTEM (POWER STEERING)
General Description
• TURBO MODEL AND STI MODEL
PS-00644
T13
T10
T16
T6
T8
T14
T15
T16
T10
(7)
(6)
(2)
(52)
(16)
(4)
(4)
(9)
(8)
(10)
(5)
(4)
(40)
(41)
(42)
(43)
(44) (47)
(28)
(27)
(29)
(30)
(31)
(32)
(33)
(34)
(35)
(48)
(50)
(49)
(51)
(46)
(15) (39)
(38)
(37)
(36)
(35)
(34)
(33)
(32)
(31)
(30)
(29)
(28)
(27)
(26)
(25)
(53)
T8
T14
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(24)
(45)
T4 T1
T3
T3
T3
T1
T2
T7
T5
T9
T11
(14)
(13)
(4)
(12)
(11)
(3)
T12 (1)
T13
T12
T13
(55)
(54)
T4
T4
T4
PS-8
POWER ASSISTED SYSTEM (POWER STEERING)
General Description
(1) Eye bolt (26) Clamp (51) Seat pad
(2) Pipe C (27) Castle nut (52) Suction hose
(3) Gasket (28) Cotter pin (53) Return hose
(4) Clip (29) Dust seal (54) Pipe G
(5) Pipe D (30) Clip (55) Pipe H
(6) Clamp E (31) Tie-rod end
(7) O-ring (32) Clip Tightening torque: Nâ‹…m (kgf-m, ft-lb)
(8) Cap (33) Boot T1: 7.4 (0.75, 5.4)
(9) Reservoir tank (34) Wire T2: 8 (0.8, 5.8)
(10) Reservoir tank bracket (35) Tie-rod T3: 13 (1.3, 9.4)
(11) Pulley (36) Holder T4: 15 (1.5, 10.8)
(12) Oil pump (37) Bushing T5: 15.7 (1.6, 11.6)
(13) Bracket (38) Oil seal T6: 20 (2.0, 14.5)
(14) Belt tension nut (39) Oil seal T7: 22 (2.2, 15.9)
(15) Stiffener (40) O-ring T8: 24 (2.4, 17.4)
(16) Belt cover (41) Rack T9: 25 (2.5, 18.1)
(17) Universal joint (42) Oil seal T10: 27 (2.75, 19.9)
(18) Dust cover (43) Back-up washer T11: 37.3 (3.8, 27.5)
(19) Plug (44) Steering body T12: 40 (4.1, 29.5)
(20) O-ring (45) Pipe A T13: 60 (6.1, 44.3)
(21) Oil seal (46) Pipe B T14: 64 (6.5, 47.0)
(22) Pinion (47) Lock nut T15: 90 (9.0, 65.1)
(23) Seal ring (48) Adjusting screw T16: 85 (8.6, 62.2)
(24) Oil seal (49) Spring
(25) Adapter (50) Sleeve
PS-9
POWER ASSISTED SYSTEM (POWER STEERING)
General Description
3. OIL PUMP
• NON-TURBO MODEL
(1) Power steering oil pump ASSY
PS-00024
(1)
PS-10
POWER ASSISTED SYSTEM (POWER STEERING)
General Description
• TURBO MODEL AND STI MODEL
C: CAUTION
• Wear work clothing, including a cap, protective
goggles, and protective shoes during operation.
• Before removal, installation or disassembly, be
sure to clarify the failure. Avoid unnecessary re-
moval, installation, disassembly and replacement.
• Be careful not to burn your hands, because each
part on the vehicle is hot after running.
• Use genuine power steering fluid, grease etc. or
the equivalent. Do not mix steering fluid, grease
etc. with that of another grade or from other manu-
facturers.
• Be sure to tighten fasteners including bolts and
nuts to the specified torque.
• Place shop jacks or rigid racks at the specified
points.
• Before securing a part on a vise, place cushion-
ing material such as wood blocks, aluminum plate,
or shop cloth between the part and the vise.
(1) Power steering oil pump ASSY
PS-00440
(1)
You're Reading a Preview
What's Included?
Lifetime Access
Fast Download Speeds
Offline Viewing
Access Contents & Bookmarks
Full Search Facility
Print one or all pages of your manual
$28.99
Viewed 18 Times Today
Secure transaction
What's Included?
Lifetime Access
Fast Download Speeds
Offline Viewing
Access Contents & Bookmarks
Full Search Facility
Print one or all pages of your manual
$28.99
The 2006-2007 Subaru Impreza 2.5i WRX STI Repair Service manual is a comprehensive guide designed to assist with the maintenance and repair of the specified Subaru Impreza models. Packed with detailed instructions, diagrams, and illustrations, this manual provides everything you need to effectively troubleshoot, diagnose, and fix issues with your vehicle.
- 2006 Subaru Impreza 2.5i WRX STI
- 2007 Subaru Impreza 2.5i WRX STI
Whether you are a professional mechanic or a DIY enthusiast, this repair service manual will prove to be an indispensable tool in your workshop. It covers a wide range of topics including engine, transmission, electrical system, brakes, suspension, steering, and much more.
With step-by-step instructions and clear explanations, the manual ensures that even complex repairs are made accessible to users of all skill levels. Additionally, it includes valuable technical specifications, troubleshooting tips, and maintenance schedules to help you keep your Subaru Impreza in optimal condition.
Invest in the 2006-2007 Subaru Impreza 2.5i WRX STI Repair Service manual and empower yourself to tackle any repair or maintenance task with confidence. No matter the issue you encounter, this manual will serve as your trusted companion, guiding you through the process and ensuring your Subaru Impreza stays reliable and efficient.
