Subaru STi TIMING BELT User's Manual
Contents
1. 10 Install the timing belt guide MT vehicle 1 Temporarily tighten the remaining bolts 2 Check and adjust clearance between the timing belt and timing belt guide Clearance 1 0 0 5 mm 0 039 0 020 in 13 11 Tighten the remaining bolts Tightening torque 9 8 N m 1 0 kgf m 7 2 ft lb yi iva il ty paeen i a ARAF Install the timing belt cover 1 Install the front belt cover C Tightening torque 5 N m 0 5 kgf m 3 6 ft lb 2 Install the right hand belt cover B Tightening torque 5 N m 0 5 kgf m 3 6 ft lb 3 Install the left hand belt cover A Tightening torque 5 N m 0 5 kgf m 3 6 ft lb Install the crankshaft pulle 1 Install the crankshaft pulley 2 Install the pulley bolt To lock the crankshaft use ST 499977300 CRANKSHAFT PULLEY WRENCH 3 Clean the crankshaft pulley thread using an air jet 4 Apply engine oil to the crankshaft pulley bolt seat and thread 5 Tighten the bolts temporarily with tightening torque of 44 N m 4 5 kgf m 33 ft lb 6 Tighten the crankshaft pulley bolts Tightening torque 127 N m 13 kgf m 94 0 ft lb 7 Confirm that the tightening angle of the crankshaft pulley bolt is 45 degrees or more If not conduct the following procedures 1 through 4 16 CAUTION If the tightening angle of crankshaft pulley bolt is less than 45 degrees the bolt should be damaged In this case the bolt must be2. SUBARU PERFORMANCE TUNING 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 some cases special tools may be required Installation should never be undertaken by unqualified persons or by those lacking the necessary tools and facilities Subaru of America Inc reserves the right to alter these installation instructions at any time without prior notification to customers http www spt subaru com 11 2003 SUBARL STi PERFORMANCE TIMING BELT Timing Belt Installation Instructions Remove the serpentine belts ALTERNATOR 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 AIR CONDITIONING COMPRESSOR BELT 1 Loosen the lock nut A 2 Loosen the slider bolt B Igy amp mag 7 P Y VON OLLA S Trt 2 LST pal Vi A Ue 3 Remove the A C belt 4 Remove the A C belt tensioner Remove the crankshaft pulle 1 Remove the crankshaft pulley bolt To lock crankshaft use ST 499977300 CRANKSHAFT PULLEY WRENCH 2 Remove the crankshaft pulley Remov
3. dition these valves are held lifted Right side camshafts are held so that their cams do not push valves down Left hand camshafts must be rotated from the zero lift position to the position where the timing belt is to be installed at as small an angle as possible in order to prevent mutual interference of intake and exhaust valve heads Do not allow the camshafts to rotate in the direction shown in the figure as this causes both 11 intake and exhaust valves to lift simultaneously resulting in interference with their heads Rotale direction Roiate direction amp Ftc bek set position Rotate _diraction Rotate direction S2M12314 Align the alignment mark on the timing belt with marks on the sprockets in the alphabetical order shown in the figure While aligning marks position the timing belt properly CAUTION Disengagement of more than three timing belt teeth may result in interference between the valve and piston e Ensure the belt s rotating direction is correct 12 Arrow mark ming bolt 3 DnA 28 tooth A 28 tooth length tengih 8 Install the belt idlers Tightening torque 39 N m 4 0 kgf m 28 9 ft lb CAUTION Make sure that the marks on the timing belt and sprockets are aligned 9 After ensuring that the marks on the timing belt and sprockets are aligned remove the stopper pin from tensioner adjuster
4. e the timing belt cover 1 Remove the left hand belt cover A 2 Remove the right hand belt cover B 3 Remove the front belt cover C EI q oy p j gt W 3 CS A ae a a esl Ab Seem Li A B e a ic E o ee Remove the timing belt 1 Remove the timing belt guides MT vehicle a Ae N a nanana j a t foo r WP e emi Wh 2 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 A Turn the crankshaft using ST 499987500 and align alignment marks on crankshaft sprocket lefthand intake camshaft sprocket left hand exhaust camshaft sprocket right hand intake camshaft sprocket and right hand exhaust camshaft sprocket with notches of belt cover and cylinder block ST 499987500 CRANKSHAFT SOCKET B Using white paint put alignment and or arrow marks on the timing belts in relation to the sprockets Z1 54 5 tooth length Z2 51 tooth length Z3 28 tooth length 4 Remove the timing belt CAUTION After the timing belt has been removed never rotate the intake and exhaust camshaft sprocket If the camshaft sprocket is rotated the intake and exhaust valve heads strike together and valve stems are bent Remove the automatic belt tension adjuster assembly 1 Remove the automatic belt tension adjuster assembly Install the automatic belt tension adj
5. h B on belt cover Make sure double lines C on intake camshaft and exhaust camshaft sprockets are aligned 4 Align single line mark A on left hand exhaust camshaft sprocket with notch B on belt cover by turning the sprocket counterclockwise as viewed from front of engine 5 Align single line mark A on left hand intake camshaft sprocket with notch B on belt cover by turning the sprocket clockwise as viewed from front of engine Ensure double lines C on intake and exhaust camshaft sprockets are aligned C ill S2M1230B 6 Ensure camshaft and crankshaft sprockets are positioned properly CAUTION Intake and exhaust camshafts for this DOHC 10 engine can be independently rotated with the timing belts removed As can be seen from the figure if the intake and exhaust valves are lifted simultaneously their heads will interfere with each other resulting in bent valves i A T gf k m aes ae rt F rT A Intake camshaft B Exhaust camshaft When the timing belts are not installed four camshafts are held at the zero lift position where all cams on camshafts do not push the intake and exhaust valves down Under this condition all valves remain unlifted When the camshafts are rotated to install the timing belts 2 intake and 4 exhaust cam of left hand camshafts are held to push their corresponding valves down Under this con
6. replaced 8 Replace the crankshaft pulley bolts and clean them Crankshaft pulley bolt 12369AA011 9 Clean the crankshaft thread using an air jet 10 Tighten the bolts temporarily with tightening torque of 44 N m 4 5 kgf m 33 ft lb 11 Tighten the crankshaft pulley bolts keeping them in an angle between 65 degrees and 75 degrees CAUTION Conduct the tightening procedures by confirming the turning angle of the crankshaft pulley bolt referring to the gauge indicated on the belt cover 12 Install the A C belt tensioner re a p gt CIL 14 Install the Alternator Power Steering belt 15 Tighten the slider bolt B until belt is snug 16 Tighten the lock bolt A 17 Tightening torque Lock bolt through bolt 25 N m 2 5 kgf m 18 ft lb Slider bolt 8 N m 0 8 kgf m 5 5 ft lb
7. uster assembly and belt idler CAUTION Always use a vertical type pressing tool to move the adjuster rod down e Do not use a lateral type vise e Push the adjuster rod vertically e Be sure to slowly move the adjuster rod down applying a pressure of 294 N 30 kgf 66 Ib e Press in the push adjuster rod gradually taking more than three minutes Do not allow press pressure to exceed 9 807 N 1 000 kgf 2 205 Ib e Press the adjuster rod as far as the end surface of the cylinder Do not press the adjuster rod into the cylinder Doing so may damage the cylinder Do not release the press pressure until stopper pin is completely inserted 1 Attach the automatic belt tension adjuster assembly to the vertical pressing tool 2 Slowly move the adjuster rod down with a pressure of 294 N 30 kof 66 Ib until the adjuster rod is aligned with the stopper pin hole in the cylinder 3 With a 2 mm 0 08 in dia stopper pin or a 2 mm 0 08 in nominal dia hex bar wrench inserted into the stopper pin hole in the cylinder secure the adjuster rod Install the timing belt Crankshaft and camshaft sprocket alignment 1 Align mark A on the crankshaft sprocket with mark on the oil pump cover at cylinder block 2 Align single line mark A on the right hand exhaust camshaft sprocket with notch B on belt cover 3 Align single line mark A on the right hand intake camshaft sprocket with notc
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