Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 82

ME(STI)-90

Cylinder Block

MECHANICAL

(7) Set the parts so that the #3 and #4 cylinders

are on the upper side. Following the same pro-

cedures as used for #1 and #2 cylinders, install

the pistons and piston pins.

(8) Install the service hole cover.

NOTE:

Use new O-rings.
Tightening torque:

6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

22) Install  the  water  tank  pipe  assembly  onto  the

cylinder block RH.
NOTE:

Use a new clamp for the water tank pipe assembly

clamp, fit the cut out in the ST with the protrusion on

the  clamp  as  shown  in  the  figure,  and  lock  the

clamp.

ST 18353AA000 CLAMP PLIERS

23) Install the baffle plate.
Tightening torque:

6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

24) Install the oil strainer.
NOTE:

Use new O-rings.
Tightening torque:

10 N·m (1.0 kgf-m, 7.4 ft-lb)

25) Tighten  the  oil  strainer  stay  together  with  the

baffle plate.
Tightening torque:

6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

26) Apply liquid gasket to the mating surfaces of oil

pan, and install the oil pan.
NOTE:

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

THREE BOND 1217G (Part No. K0877Y0100) 

or equivalent

Tightening torque:

5 N·m (0.5 kgf-m, 3.7 ft-lb)

27) Apply liquid gasket to the mating surface of oil

separator cover and the threaded portion of bolt (A)

shown  in  the  figure  (when  reusing  the  bolt),  and

then install the oil separator cover.
NOTE:

• Install within 5 min. after applying liquid gasket.

• Use new oil separator cover.
Liquid gasket:

Mating surface

THREE BOND 1217G (Part No. 

K0877Y0100) or equivalent

Bolt thread (A) (when reusing the bolt)

THREE BOND 1324 (Part No. 004403042) or 

equivalent

Tightening torque:

6.4 N·m (0.65 kgf-m, 4.7 ft-lb)

28) Install the flywheel. <Ref. to CL-14, INSTALLA-

TION, Flywheel.>

29) Install the clutch disc and cover. <Ref. to CL-

11, INSTALLATION, Clutch Disc and Cover.>

ME-04374

ST

(A) Gasket

LU-02353

(A)

ME-03333

(A)

ME(STI)-91

Cylinder Block

MECHANICAL

30) Install the oil pump.

(1) Using the ST, install the front oil seal.

ST 499587100

OIL SEAL INSTALLER

NOTE:

Use a new front oil seal.

(2) Apply liquid gasket to the mating surfaces of

oil pump.

NOTE:

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

THREE BOND 1217G (Part No. K0877Y0100) 

or equivalent

(3) Apply a thin coat of engine oil to the inside of

front oil seal.

(4) Install the oil pump to cylinder block.

CAUTION:

• Be  careful  not  to  damage  the  front  oil  seal

during installation.

• Make sure the front oil seal lip is not folded.
NOTE:

• Align the flat surface of oil pump’s inner rotor with

that of crankshaft before installation.

• Use new O-rings.

• Do not forget to assemble O-rings.

(5) Apply liquid gasket to the three bolts thread

shown in figure. (when reusing bolts)

Liquid gasket:

THREE BOND 1324 (Part No. 004403042) or 

equivalent

Tightening torque:

6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

31) Install the water pump and gasket.
NOTE:

• When installing the water pump, tighten bolts in

two  stages  in  alphabetical  order  as  shown  in  the

figure.

• Use a new gasket.
Tightening torque:

First: 12 N·m (1.2 kgf-m, 8.9 ft-lb)

Second: 12 N·m (1.2 kgf-m, 8.9 ft-lb)

32) Install the water by-pass pipe for heater.
Tightening torque:

6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

33) Install  the  oil  cooler.  <Ref.  to  LU(STI)-24,  IN-

STALLATION, Engine Oil Cooler.>

(A) O-ring

LU-00021

ST

ME-00165

(A)

ME-00312

ME-04946

ME-04743

(F)

(C)

(A)

(E)

(D)

(B)

ME(STI)-92

Cylinder Block

MECHANICAL

34) Install  the  oil  filter.  <Ref.  to  LU(STI)-31,  IN-

STALLATION, Engine Oil Filter.>

35) Install the cylinder head. <Ref. to ME(STI)-70,

INSTALLATION, Cylinder Head.>

36) Install the camshaft. <Ref. to ME(STI)-64, IN-

STALLATION, Camshaft.>

37) Install the generator and A/C compressor with

their brackets.
Tightening torque:

36 N·m (3.7 kgf-m, 26.6 ft-lb)

38) Install the crank sprocket. <Ref. to ME(STI)-60,

INSTALLATION, Crank Sprocket.>

39) Install the cam sprocket. <Ref. to ME(STI)-59,

INSTALLATION, Cam Sprocket.>

40) Install the timing belt. <Ref. to ME(STI)-52, IN-

STALLATION, Timing Belt.>

41) Adjust the valve clearance. <Ref. to ME(STI)-

29, ADJUSTMENT, Valve Clearance.>

42) Install the rocker cover.

(1) Install the rocker cover gasket to the rocker

cover. (outer section and ignition coil section)

NOTE:

Use a new rocker cover gasket.

(2) Apply liquid gasket to the specified point of

the cylinder head.

NOTE:

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

THREE BOND 1217G (Part No. K0877Y0100) 

or equivalent

(3) Install the rocker cover onto cylinder heads.

Ensure the gasket is properly positioned during

installation.

(4) Temporarily tighten the rocker cover bolts in

alphabetical order shown in the figure, and then

tighten to specified torque in alphabetical order.

Tightening torque:

6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

ME-05981

ME-05982

(E)

(F)

(H)

(G)

(D),(L)

(A),(I)

(C),(K)

(B),(J)

(B),(J)

(H)

(F)

(C),(K)

(E)

(A),(I)

(D),(L)

(G)

ME(STI)-93

Cylinder Block

MECHANICAL

43) Connect the PCV hose (A) and vacuum hose

(B) to the rocker cover.
NOTE:

Use a new clamp for the PCV hose (A), fit the cut

out in the ST with the protrusion on the clamp as

shown in the figure, and lock the clamp.

ST 18353AA000 CLAMP PLIERS

44) Install the timing belt cover. <Ref. to ME(STI)-

49, INSTALLATION, Timing Belt Cover.>

45) Install  the  crank  pulley.  <Ref.  to  ME(STI)-47,

INSTALLATION, Crank Pulley.>

46) Install the intake manifold. <Ref. to FU(STI)-21,

INSTALLATION, Intake Manifold.>

47) Install the rear side belt. <Ref. to ME(STI)-41,

REAR SIDE BELT, INSTALLATION, V-belt.>

48) Install  the  engine  to  the  vehicle.  <Ref.  to

ME(STI)-34, INSTALLATION, Engine Assembly.>

ME-04374

ST

ME-05768

(A)

(B)

(A)

(B)