Subaru Legacy 2003 Service Manual page 1696

simultaneously, their heads will interfere with
each other, resulting in bent valves.
(A) Intake camshaft
(B) Exhaust camshaft
• When the timing belts are not installed, four
camshafts are held at the "zero-lift" position,
where all cams on camshafts do not push the
intake and exhaust valves down. (Under this
condition, all valves remain unlifted.)
• When the camshafts are rotated to install the
timing belts, #2 intake and #4 exhaust cam of
left-hand camshafts are held to push their cor-
responding valves down. (Under this condition,
these valves are held lifted.) Right-side cam-
shafts are held so that their cams do not push
valves down.
• Left-hand camshafts must be rotated from
the "zero-lift" position to the position where the
timing belt is to be installed at as small an angle
as possible, in order to prevent mutual interfer-
ence of intake and exhaust valve heads.
• Do not allow the camshafts to rotate in the di-
rection shown in the figure as this causes both
TIMING BELT ASSEMBLY
(A)
(B)
ME-00086
ME(H4DOSTC)-51
intake and exhaust valves to lift simultaneous-
ly, resulting in interference with their heads.
( B )
( B )
(A) Rotating direction
(B) Timing belt installation position
3) Installation of timing belt:
Align the alignment mark on timing belt with marks
on sprockets in alphabetical order shown in the fig-
ure.
While aligning marks, position the timing belt prop-
erly.
CAUTION:
• Disengagement of more than three timing
belt teeth may result in interference between
the valve and piston.
• Ensure the belt's rotating direction is correct.
MECHANICAL
( A )
( A )
( A )
( A )
ME-00314
ME-00088