2011 Subaru Forester Owner's Manual - Page 366

Maintenance and service 11-19 Spark plugs It may be difficult to replace the spark plugs. It is recommended that you have the spark plugs replaced by your SUBARU dealer. The spark plugs should be replaced according to the maintenance schedule in the "Warranty and Maintenance Booklet". Drive belts & Turbo models . Crank pulley Check the deflection of the front side belt and if there is any looseness, cracks, wear or unusual noise on the front side belt, contact your SUBARU dealer. Continuing to use the vehicle with the belt outside of the specification may cause the engine to malfunction and the above components to malfunction. To check the deflection of the front side belt, place a straightedge (ruler) across two adjacent pulleys (alternator pulley and crank pulley) and apply a force of 22 lbf (98 N, 10 kgf) midway between the pulleys by using a spring scale. The 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) CAUTION . When disconnecting the spark plug cables, always grasp the spark plug cap, not the cables. . Make sure the cables are replaced in the correct order. & Recommended spark plugs NOTE For the recommended spark plugs, refer to "Electrical system" F12-3. 1) 2) 3) 4) 5) 6) A) Power steering oil pump pulley Front side belt Alternator pulley Air conditioner compressor pulley Rear side belt Crank pulley 22 lbf (98 N, 10 kgf) CAUTION The front side belt, which runs in conjunction with the following components, must be used within the specified deflection. . Power steering oil pump pulley . Alternator pulley The rear side belt is a stretch-type belt, therefore the deflection does 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 - CONTINUED -