Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 166

ME(w/o STI)-45

Crank Pulley

MECHANICAL

13.Crank Pulley

A: REMOVAL

NOTE:

When replacing a single part, perform the work with

the engine assembly installed to body.

1) Remove the V-belts. <Ref. to ME(w/o STI)-38,

REMOVAL, V-belt.>

2) Use the ST to lock the crank pulley, and remove

the crank pulley bolt.

ST 499977100

CRANK PULLEY WRENCH

3) Remove the crank pulley.

B: INSTALLATION

1. METHOD WITHOUT ANGLE GAUGE

1) Clean the crankshaft thread using compressed

air.

2) Install the crank pulley.

3) Apply engine oil to the crank pulley bolt seat and

thread.

4) Tighten the crank pulley bolts.

(1) Use the ST to lock the crank pulley, and

temporarily tighten the crank pulley bolt.

ST 499977100

CRANK PULLEY WRENCH

Tightening torque:

47 N·m (4.8 kgf-m, 34.7 ft-lb)

(2) Draw reference lines (A) and (B) using a

marker to set the socket to the crank pulley bolt

as shown in the figure.

NOTE:

Set the socket onto the crank pulley bolt so that ref-

erence lines (A) and (B) is visible.

ST 499977100

CRANK PULLEY WRENCH

(3) Draw end line (C) on ST using a marker at

the same position as reference line (B) drawn

on the socket in step (2).

ST 499977100

CRANK PULLEY WRENCH

ME-04141

ST

ST

ME-04142

(a) When using 6-point socket
(b) When using 12-point socket

ME-04955

(B)

ST

(A)

(a)

(B)

(A)

(b)

(B)

(A)

ME-04144

(B)

ST

(C)

ME(w/o STI)-46

Crank Pulley

MECHANICAL

(4) Use the ST to lock the crank pulley, and

tighten the crank pulley bolt to the angle where

reference line (A) and end line (C) are aligned.

NOTE:

It should be approx. 60° when reference line (A)

and end line (C) are aligned.

ST 499977100

CRANK PULLEY WRENCH

Tightening angle:

60°

±

5°

5) Install the V-belts. <Ref. to ME(w/o STI)-38, IN-

STALLATION, V-belt.>

2. METHOD WITH ANGLE GAUGE

1) Clean the crankshaft thread using compressed

air.

2) Install the crank pulley.

3) Apply engine oil to the crank pulley bolt seat and

thread.

4) Tighten the crank pulley bolts.

(1) Remove the radiator main fan motor assem-

bly and radiator sub fan motor assembly. <Ref.

to CO(w/o STI)-23, REMOVAL, Radiator Main

Fan and Fan Motor.> <Ref. to CO(w/o STI)-25,

REMOVAL, Radiator Sub Fan and Fan Motor.>

(2) Use the ST to lock the crank pulley, and

temporarily tighten the crank pulley bolt.

ST 499977100

CRANK PULLEY WRENCH

Tightening torque:

47 N·m (4.8 kgf-m, 34.7 ft-lb)

(3) Set the angle gauge, use the ST to lock the

crank pulley, and tighten the crank pulley bolt to

the specified angle.

ST 499977100

CRANK PULLEY WRENCH

Tightening angle:

60°

±

5°

(4) Install the radiator main fan motor assembly

and radiator sub fan motor assembly. <Ref. to

CO(w/o STI)-23, INSTALLATION, Radiator

Main Fan and Fan Motor.> <Ref. to CO(w/o

STI)-25, INSTALLATION, Radiator Sub Fan

and Fan Motor.>

5) Install the V-belts. <Ref. to ME(w/o STI)-38, IN-

STALLATION, V-belt.>

C: INSPECTION

1) Check that the crank pulley has no deformation,

cracks or other damages.

ME-04145

ST

(A)

(C)

ME-07558

ST

ME-07555

ST

ME(w/o STI)-47

Timing Belt Cover

MECHANICAL

14.Timing Belt Cover

A: REMOVAL

NOTE:

When replacing a single part, perform the work with

the engine assembly installed to body.

1) Remove the secondary air pump. <Ref. to EC(w/

o STI)-29, REMOVAL, Secondary Air Pump.>

2) Remove the crank pulley. <Ref. to ME(w/o STI)-

45, REMOVAL, Crank Pulley.>

3) Remove the timing belt cover RH (A).

4) Remove the timing belt cover LH (B).

5) Remove the front timing belt cover (C).

B: INSTALLATION

1) Install the front timing belt cover (C).
Tightening torque:

5 N·m (0.5 kgf-m, 3.7 ft-lb)

2) Install the timing belt cover LH (B).
Tightening torque:

5 N·m (0.5 kgf-m, 3.7 ft-lb)

3) Install the timing belt cover RH (A).
Tightening torque:

5 N·m (0.5 kgf-m, 3.7 ft-lb)

4) Install the crank pulley. <Ref. to ME(w/o STI)-45,

INSTALLATION, Crank Pulley.>

5) Install the secondary air pump. <Ref. to EC(w/o

STI)-29, INSTALLATION, Secondary Air Pump.>

C: INSPECTION

Check the timing belt cover for damage.

ME-04754

(A)

(C)

(B)

ME-04754

(A)

(C)

(B)

ME(w/o STI)-48

Timing Belt

MECHANICAL

15.Timing Belt

A: REMOVAL

NOTE:

• When replacing a single part, perform the work

with the engine assembly installed to body.

• When performing the work with the engine in-

stalled to body, the following parts must also be re-

moved/installed.

• Radiator main fan motor assembly <Ref. to

CO(w/o STI)-23, REMOVAL, Radiator Main Fan

and Fan Motor.> <Ref. to CO(w/o STI)-23, IN-

STALLATION, Radiator Main Fan and Fan Mo-

tor.>

• Radiator sub fan motor assembly <Ref. to

CO(w/o STI)-25, REMOVAL, Radiator Sub Fan

and Fan Motor.> <Ref. to CO(w/o STI)-25, IN-

STALLATION, Radiator Sub Fan and Fan Mo-

tor.>

• When performing the work with the engine in-

stalled to body, protect the radiator with cardboards

or blankets.

1. TIMING BELT

1) Remove the crank pulley. <Ref. to ME(w/o STI)-

45, REMOVAL, Crank Pulley.>

2) Remove the timing belt cover. <Ref. to ME(w/o

STI)-47, REMOVAL, Timing Belt Cover.>

3) Remove the timing belt guide.

4) If the alignment mark or arrow mark (which indi-

cates the direction of rotation) on timing belt fade

away, put new marks before removing the timing

belt as shown in procedures below.

(1) Turn the crankshaft using ST, and align the

alignment marks on crank sprocket, intake cam

sprocket LH, exhaust cam sprocket LH, intake

cam sprocket RH and exhaust cam sprocket

RH with marks on oil pump and notches of tim-

ing belt cover.

ST 499987500

CRANKSHAFT SOCKET

ME-00230

ME-03124

ME-00728

ME-00729

ME-00231

ST