Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 104

LU(STI)-18

Oil Pan and Strainer

LUBRICATION

5. Oil Pan and Strainer

A: REMOVAL

1) Disconnect the ground cable from battery.

2) Remove the air intake duct. <Ref. to IN(STI)-10,

REMOVAL, Air Intake Duct.> <Ref. to IN(w/o STI)-

10, REMOVAL, Air Intake Duct.>

3) Remove the air intake boot.

4) Remove  the  intercooler.  <Ref.  to  IN(STI)-12,

REMOVAL, Intercooler.> <Ref. to IN(w/o STI)-12,

REMOVAL, Intercooler.>

5) Remove the pitching stopper.

6) Remove the radiator upper brackets.

7) Support the engine with a lifting device and wire

ropes.

8) Lift up the vehicle.
CAUTION:

When lifting up the vehicle, raise up wire ropes

at the same time.

9) Remove  the  under  cover.  <Ref.  to  EI-28,  RE-

MOVAL, Front Under Cover.>

10) Drain the engine oil. <Ref. to LU(STI)-11, RE-

PLACEMENT, Engine Oil.>

11) Remove  the  front  exhaust  pipe.  <Ref.  to

EX(STI)-6, REMOVAL, Front Exhaust Pipe.>

12) Remove  the  nuts  which  secure  the  engine

mounting to the front crossmember.

13) Remove the bolts which secure oil pan on cyl-

inder block with the engine raised up.

14) Insert an oil pan cutter blade between cylinder

block-to-oil pan clearance and remove the oil pan.
CAUTION:

Do not use a screwdriver or similar tool in place

of oil pan cutter.

15) Remove the oil strainer.

IN-00203

LU-02413

EX-02520

CO-02407

LU-00222

LU-02415

LU(STI)-19

Oil Pan and Strainer

LUBRICATION

16) Remove the baffle plate.

B: INSTALLATION

NOTE:

Before installing the oil pan, clean the mating sur-

face of oil pan and engine block.

1) Make  sure  that  the  seals  (A)  are  installed  se-

curely on the baffle plate in a direction as shown in

the figure below.
NOTE:

Use a new seal.

2) Install the baffle plate.
Tightening torque:

6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

3) Install the oil strainer to cylinder block.
NOTE:

Use new O-rings.
Tightening torque:

10 N·m (1.0 kgf-m, 7.4 ft-lb)

4) Tighten the oil strainer stay together with the baf-

fle plate.
Tightening torque:

6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

5) Apply liquid gasket to the mating surfaces of oil

pan, and install the oil pan.
NOTE:

• Use a new gasket.

• Install within 5 min. after applying liquid gasket.
Liquid gasket:

THREE BOND 1217G (Part No. K0877Y0100) 

or equivalent

(A) Oil pan
(B) Oil strainer

(C) Baffle plate
(D) Cylinder block

(A)

(C)

(D)

(B)

LU-02334

LU-00052

(A)

(A) Gasket

LU-02353

(A)

LU(STI)-20

Oil Pan and Strainer

LUBRICATION

6) Tighten the bolts which install oil pan to cylinder

block.
Tightening torque:

T1: 5 N·m (0.5 kgf-m, 3.7 ft-lb)

T2: 6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

T3: 10 N·m (1.0 kgf-m, 7.4 ft-lb)

7) Lower the engine onto front crossmember.

8) Install the nuts which hold the engine mounting

to the front crossmember.
Tightening torque:

45 N·m (4.6 kgf-m, 33.2 ft-lb)

9) Install the front exhaust pipe. <Ref. to EX(STI)-6,

INSTALLATION, Front Exhaust Pipe.>

10) Install the under cover. <Ref. to EI-28, INSTAL-

LATION, Front Under Cover.>

11) Lower the vehicle.
CAUTION:

When lowering the vehicle, lower the lift up de-

vice and wire ropes at the same time.

12) Remove the lifting device and wire ropes.

13) Install the pitching stopper.
Tightening torque:

T1: 50 N·m (5.1 kgf-m, 36.9 ft-lb)

T2: 58 N·m (5.9 kgf-m, 42.8 ft-lb)

14) Install the radiator upper brackets.
Tightening torque:

12 N·m (1.2 kgf-m, 8.9 ft-lb)

15) Install the intercooler. <Ref. to IN(STI)-13, IN-

STALLATION,  Intercooler.> <Ref. to  IN(w/o STI)-

12, INSTALLATION, Intercooler.>

(A) Oil pan
(B) Oil strainer

(C) Baffle plate
(D) Cylinder block

T2

T2

T3

T1

(A)

(C)

(D)

(B)

T1

LU-02335

LU-02415

LU-00222

MT-01301

T1

T2

CO-02407

LU(STI)-21

Oil Pan and Strainer

LUBRICATION

16) Install the air intake boot.
Tightening torque:

2.5 N·m (0.3 kgf-m, 1.8 ft-lb)

17) Install the air intake duct. <Ref. to IN(STI)-10,

INSTALLATION, Air Intake Duct.> <Ref. to IN(w/o

STI)-10, INSTALLATION, Air Intake Duct.>

18) Connect the battery ground terminal.

19) Refill  the  engine  oil.  <Ref.  to  LU(STI)-11,  IN-

SPECTION, Engine Oil.>

C: INSPECTION

Check that the oil pan, oil strainer and baffle plate

do not have deformation, cracks or damage.

LU-02413

IN-00203