Subaru Legacy 2004 Service Manual page 1161

Timing Belt
MECHANICAL
4. BELT IDLER
1) Check the belt idler for smooth rotation. Replace
if noise or excessive play occurs.
2) Check the outer contacting surfaces of idler pul-
ley for abnormal wear and scratches.
3) Check the belt idler for grease leakage.
ME(H4DOTC)-50