Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Impreza 2001-2002.2004-2007 Approved Subaru Impreza 2004 WRX STi 02. ENGINE SECTION (STi) 04. MECHANICAL 15. Timing Belt Assembly

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                                   TIMING BELT ASSEMBLY
MECHANICAL

15.Timing Belt Assembly
A: REMOVAL
1. TIMING BELT
1) Remove the V-belt. 
2) Remove the crankshaft pulley. 
3) Remove the timing belt cover.                                                              ME-00729

4) Remove the timing belt guides.                      5) If the alignment mark and/or arrow mark (which
                                                       indicates rotation direction) on timing belt fade
                                                       away, put new marks before removing the timing
                                                       belt as follows:
                                                          (1) Turn the crankshaft using ST, and align the
                                                          alignment marks on crankshaft sprocket, intake
                                                          camshaft sprocket (LH), exhaust camshaft
                                                          sprocket (LH), intake camshaft sprocket (RH)
                                                          and exhaust camshaft sprocket (RH) with notch-
                                                          es of timing belt cover and cylinder block.
                                                       ST 499987500          CRANKSHAFT SOCKET
                                      ME-00065




                                                                        ST
                                                                                             ME-00069
                                      ME-00727




                                      ME-00728




                                                 ME(STi)-46
                                     TIMING BELT ASSEMBLY
                                                                                                MECHANICAL

   (2) Using white paint, put alignment and/or ar-      7) Remove the timing belt.
   row marks on the timing belts in relation to the     CAUTION:
   sprockets.                                           After the timing belt has been removed, never
                                                        rotate the intake and exhaust, camshaft sprock-
                                                        et. If the camshaft sprocket is rotated, the in-
                                                        take and exhaust valve heads strike together
                                                        and valve stems are bent.
                                                        2. BELT IDLER AND AUTOMATIC BELT
                                                        TENSION ADJUSTER ASSEMBLY
                                                        1) Remove the belt idler (B) and (C).

                                       EN-00070
                                                                                                (C)

                                                                          (B)




                                                                   (A)

                                                                                                  ME-00074

                                                        2) Remove the belt idler No. 2.
                                       ME-00071

  Z1: 54.5 tooth length
  Z2: 51 tooth length
  Z3: 28 tooth length



                  Z1            Z2
       Z3                                  Z3

                                                                                                  ME-00075

                                                        3) Remove the automatic belt tension adjuster as-
                                                        sembly.

                                       ME-00072

6) Remove the belt idler (A).


                                     (C)

                  (B)



                                                                                                  ME-00076



            (A)

                                       ME-00073




                                                  ME(STi)-47
                                      TIMING BELT ASSEMBLY
MECHANICAL

B: INSTALLATION                                          2) Install the automatic belt tension adjuster as-
                                                         sembly.
1. AUTOMATIC BELT TENSION ADJUST-
ER ASSEMBLY AND BELT IDLER                               Tightening torque:
                                                           39 N

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