Subaru Legacy 2003 Service Manual page 1697

MECHANICAL
( 3 )
RH-IN
RH-EX
( E )
(1) Arrow mark
(2) Timing belt
(3) 28 tooth length
4) Install the belt idlers.
Tightening torque:
39 N·m (4.0 kgf-m, 28.9 ft-lb)
NOTE:
Make sure that the marks on the timing belt and
sprockets are aligned.
5) After ensuring that the marks on the timing belt
and sprockets are aligned, remove the stopper pin
from tensioner adjuster.
TIMING BELT ASSEMBLY
( 4 )
( D )
( 7 )
(4) 54.5 tooth length
(5) 51 tooth length
(6) 28 tooth length
ME-00090
ME(H4DOSTC)-52
( 1 )
( 5 )
( B )
( A )
(7) Install it in the end
( 2 )
( 6 )
LH-IN
LH-EX
( C )
ME-00089