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Subaru STi TIMING BELT manual

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Table of contents for the manual

  • Page 1

    STi TIMING BELT INSTRUCTIONS Thank you for your purchase of SPT Performance Parts. The following instructions have been provided to you as a courtesy of Subaru of America, Inc. Installation instructions are intended only for certified trained automotive technicians or those with the necessary automotive knowledge to properly complete the job. In so[...]

  • Page 2

    1 STi PERFORMAN CE TI MI NG BELT Timing Belt Installation Instructions Remove the serpentine belts A LTERN A TOR / POWER STEERING BELT 1) Remove the belt cover. 2) Loosen the lock bolt (A). 3) Loosen the slider bolt (B). 4) Remove the Alternator / Power Steering belt ( C). A IR CONDITIONING COMPRESSOR BELT 1) Loosen the lock nut (A) . 2) Loosen the[...]

  • Page 3

    2 3) Remove the A/C belt. 4) Remove the A/C belt tensioner. Remove the crankshaft pulle y 1) Remove the crankshaft pulley bolt. To lock crankshaft, use: ST 499977300 CRANKSHAFT PULLEY W RENCH 2) Remove the crankshaft pulley. Remove the timing belt cove r 1) Remove the left-hand belt cover (A).[...]

  • Page 4

    3 2) Remove the right-hand belt cover (B). 3) Remove the front belt cover (C). Remove the timing belt 1) Remove the timing belt guides. (MT vehicle)[...]

  • Page 5

    4 2) If the alignment mark and/or arrow mark (which indicates rotation direction) on timing belt fade away, put new mar ks before removing the timing belt as follows: (A) Turn t he crankshaft using ST 499987500 and alig n alignment marks on crankshaft sprocket, lefthand intake camshaft sprocket, left-hand exhaust camshaft sprocket, right-hand intak[...]

  • Page 6

    5 Z 1 : 54.5 tooth length Z 2 : 51 tooth length Z 3 : 28 tooth length 3) Remove the belt idler (A).[...]

  • Page 7

    6 4) Rem ove the timing belt. CA UT ION: A fter the ti ming belt has been remov ed, never rotate the intake and exhaus t, camshaft sprocket. If the camshaft sprocket is rotated, the intake and exhaust valve heads strike together and valve stems are ben t. Remove the automa t i c b e lt tension a d juster assembly 1 ) Re m o v e t he a u t o m a t i[...]

  • Page 8

    7 Install the automatic belt tens ion ad juster assembly and belt idle r CA UT ION: • A lw ays use a v ertical type pressing tool to move the adjuster rod do wn. • Do n ot u se a latera l ty p e vise. • Push the adjuster rod vert ically. • Be sure to slo wly move the adjuster rod down applying a pressure of 294 N (30 kgf, 66 lb). • Press-[...]

  • Page 9

    8 4) Install the automatic belt tension adjuster assembly. Tightening torque: 39 N·m (4.0 kgf-m, 28.9 ft-lb)[...]

  • Page 10

    9 Install the tim ing belt Crankshaft and camshaft sprocket alignment (1) Align mark (A) on the c rankshaft sprocket with mark on the oil pump cover at cy linder block. (2) Align single line mark (A) on the right-hand exhaust camshaft sproc ket with notch (B) on belt cover. (3) Align single line mark (A) on the right-hand intake camshaft sprocket w[...]

  • Page 11

    10 and exhaust camshaft sprockets are aligned.) (4) Align single line mark (A) on left-hand exhaust camshaft sprocket with notch (B) on bel t cover by tur nin g the sprocket counterclockwise (as viewed from front of en gine). (5) Align single line mark (A) on left-hand intake camshaft sprocket with notch (B) on bel t cover by turning the sprocket c[...]

  • Page 12

    11 engine can be independently rotated with the timing belts removed. A s can be seen from the figure, if the intake and exhaus t valves are lifted simultaneously , their heads will interfere with each other, resulting in bent valves. (A) Intake cam shaft (B) Exhaust ca mshaft • When the timi n g belts are not installed, f our camshafts are held [...]

  • Page 13

    12 intake and exhaust valves to lift simultaneously, resulting in interference with t heir heads. 7) Installat ion of timing belt: Align the alig nment mark on the timing belt with marks on the sprockets in the alphabetical order shown in the figure. W hile aligning marks, position the timing belt properly. CA UT ION: • Dise ngage ment o f mo re [...]

  • Page 14

    13 8) Inst all the belt idler s. Tightening torque: 39 N·m (4.0 kgf-m, 28.9 ft-lb) CA UT ION: Make sure that the marks on the timing belt and sprockets are aligned. 9) After ensuring that the mar ks on the timing belt and sprockets are aligned, remove the stopper pin from tensioner adj uster. 10) Install the timing belt guide. (MT vehicle) (1) Tem[...]

  • Page 15

    14 (11) Tighten t he remaining bolts. Tightening torque: 9.8 N·m (1.0 kgf-m, 7.2 ft-lb)[...]

  • Page 16

    15 Install the tim ing belt cover 1) Install t he front belt cover (C). Tightening torque: 5 N·m (0.5 k gf- m, 3 .6 ft-l b) 2) Install t he right-hand belt cover (B).[...]

  • Page 17

    16 Tightening torque: 5 N·m (0.5 k gf- m, 3 .6 ft-l b) 3) Install the left-hand belt cover (A). Tightening torque: 5 N·m (0.5 k gf- m, 3 .6 ft-l b) Install the crankshaft pu lley 1) Install t he crankshaft pulley. 2) Install t he pulley bolt. To lock the crankshaft, use: ST 499977300 CRANKSHAFT PULLEY W RENCH (3) Clean the crankshaft pulley threa[...]

  • Page 18

    17 CA UT ION: If the tightening angle of crankshaft pu lley bolt is less than 45 degrees, the bolt should be damaged. In this case, the bolt must be replaced. (8) Replace the crankshaft pulley bolts and clean them. Crankshaft pulley bolt: 12369AA011 (9) Clean the crankshaft thread using an air jet. (10) Tig h ten the bolts temporarily w ith tighten[...]

  • Page 19

    18 Tightening torque: Lock bolt through bolt: 25 N·m (2.5 kgf-m, 18 ft-lb) Slider bol t: 8 N·m (0.8 k gf- m, 5 .5 ft-l b) 17) Install t he belt cover.[...]