Index Subaru Subaru Impreza 3 / Impreza WRX / Impreza WRX STI - service repair manual 2008-2014 year
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PM-10 V-belt PERIODIC MAINTENANCE SERVICES 6. V-belt A: INSPECTION CAUTION: Check and adjust the front side belt tension so that it is within the specified range. Using the belt with a tension out of the specified range may result in a fault such as the following: • If the front side belt tension is higher, unex- pected force is generated at the power steering oil pump, generator and crankshaft bearing, causing abnormal noise due to abnormal wear of the bearing. • If the front side belt tension is lower, the front side belt and crank pulley slip, causing abnor- mally high temperature on the crank pulley due to frictional heat. If this condition repeatedly occurs, the front side belt may abnormally wear, causing abnormal noise, front side belt damage or crank pulley damage. Since the rear belt is a stretch type belt, it does not require tension check and adjustment. 1. PROCEDURE (WITHOUT BELT TEN- SION GAUGE) 1) Replace the belts if cracks, fraying or wear are found. 2) Check the V-belt tension and adjust it if neces- sary by changing the generator installing position or idler pulley installing position. <Ref. to PM-10, REPLACEMENT, V-belt.> lbf) When replacing: 7 — 9 mm (0.276 — 0.354 in) When reusing: 9 — 11 mm (0.354 — 0.433 in) 2. PROCEDURE (WITH BELT TENSION GAUGE) 1) Replace the belts if cracks, fraying or wear are found. 2) Remove the V-belt covers and radiator reservoir tank. 3) Check the belt tension, using the belt tension gauge. Adjust the tension, if necessary by chang- ing the generator installing position or idler pulley installing position. When installing new parts: 640 — 780 N (65 — 80 kgf, 144 — 175 lbf) At inspection: 490 — 640 N (50 — 65 kgf, 110 — 144 lbf) B: REPLACEMENT 1. FRONT SIDE BELT (FOR POWER STEERING OIL PUMP AND GENERATOR) NOTE: Wipe off any oil or water on the belt and pulley. 1) Remove the V-belt covers. 2) Loosen the lock bolt (A). 3) Loosen the slider bolt (B). 4) Remove the front side belt (C). (A) Front side belt (C) 98 N (10 kgf, 22 lbf) C/P Crank pulley GEN Generator pulley P/S Power steering oil pump pulley A/C A/C compressor pulley ME-03314 (A) (B) GEN C/P A/C P/S (C) (A) Front side belt C/P Crank pulley GEN Generator pulley P/S Power steering oil pump pulley A/C A/C compressor pulley ME-03313 C/P P/S A/C GEN (A) (B) PM-00378 |