2008 Subaru Impreza Owner's Manual - Page 336
2008 Subaru Impreza Manual
Page 336 highlights
11-20 Maintenance and service & Recommended spark plugs Non-turbo models: FR5AP-11 (NGK) Turbo models: SILFR6A (NGK) Drive belts using a spring scale. Belt deflection should be the amount specified. If the front side belt is loose, cracked, or worn, contact your SUBARU dealer. in (mm) Deflection New belt A 0.28 - 0.35 (7.0 - 9.0) Used belt 0.35 - 0.43 (9.0 - 11.0) 1) 2) 3) 4) 5) 6) A) Power steering pump pulley Front side belt Alternator Air conditioner compressor pulley Rear side belt Crank pulley 98 N (10 kgf, 22 lbf) The rear side belt is a stretch-type belt, and the deflection and tension do not need to be checked. If there are cracks or wear confirmed on the belts and a squeaking sound is heard from them, contact your SUBARU dealer. The alternator, power steering pump, and air conditioner compressor depend on drive belts. Satisfactory performance requires that belt tension be correct. To check the tension of the front side belt, place a straightedge (ruler) across two adjacent pulleys (alternator and crank pulley) and apply a force of 22 lbs (98 N, 10 kg) midway between the pulleys by
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