Engine Mechanical (H4DOTC): V-belt: Inspection

Replace the belts, if cracks, fraying or wear is found.
Check the drive belt tension and adjust it if necessary by changing generator installing position and/or idler pulley installing position.
Belt tension (With using belt tension gauge)

(A)

replaced: 618 - 755 N (63 - 77 kgf, 139 - 170 lb)

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

(B)*

replaced: 740 - 880 N (75 - 90 kgf, 166 - 198 lb)

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

*: with air conditioner

Fig 1: Checking Drive Belt Tension
Courtesy of SUBARU OF AMERICA, INC.

Belt tension

(A)

replaced: 7 - 9 mm (0.276 - 0.354 in)

reused: 9 - 11 mm (0.354 - 0.433 in)

(B)*

replaced: 7.5 - 8.5 mm (0.295 - 0.335 in)

reused: 9.0 - 10.0 mm (0.354 - 0.394 in)

*: with air conditioner

Fig 2: Checking Drive Belt Tension With Torque Specifications
Courtesy of SUBARU OF AMERICA, INC.