Engine Mechanical (H4SO): V-belt: Inspection

Replace the belts, if crack, fraying or wear is found.
Check the belt tension and adjust it if necessary by changing the generator installing position or idler pulley installing position.
Belt tension (with belt tension gauge):

(A)

When installing new parts: 640 - 780 N (65 - 80 kgf, 144 - 175 lb)

At inspection: 490 - 640 N (50 - 65 kgf, 110 - 144 lb)

(B)

When installing new parts: 650 - 750 N (66 - 76 kgf, 146 - 169 lb)

At inspection: 350 - 450 N (36 - 46 kgf, 78 - 101 lb)

Fig 1: Checking Belt Tension (With Belt Tension Gauge)
Courtesy of SUBARU OF AMERICA, INC.

Belt tension (without belt tension gauge):

(A)

When installing new parts: 7 - 9 mm (0.276 - 0.354 in)

At inspection: 9 - 11 mm (0.354 - 0.433 in)

(B)

When installing new parts: 7.5 - 8.5 mm (0.295 - 0.335 in)

At inspection: 9.0 - 10.0 mm (0.354 - 0.394 in)

Fig 2: Checking Belt Tension (Without Belt Tension Gauge)
Courtesy of SUBARU OF AMERICA, INC.