Subaru 2009 IMPREZA Service Manual page 81

3) When camshaft pulley or timing belt position is
offset, check for any defect and repair or replace as
required.
2. SOHC MODEL (CHECK FOR OTHERS)
1) Remove the timing belt cover (LH).
2) While cranking engine at least four rotations,
check the timing belt back surface for cracks or
damage. Replace the faulty timing belt as needed.
3) When the side part of timing belt (arrow direction
shown in the figure) is abnormally worn (fluff or
jumping out of core) or damaged, check the idlers,
tensioner, water pump pulley and cam sprocket to
determine idler alignment (squareness). Replace
the worn or damaged timing belt.
4) Install the timing belt cover (LH).
3. DOHC MODEL (CHECK FOR TIMING
BELT POSITION)
1) Remove the timing belt cover (LH) and (RH).
2) Turn the crank pulley and align single line mark
(A) on the intake camshaft pulley (RH) with notch
(B) on timing belt cover and check the following.
(1) Make sure double lines (C) on intake and
exhaust camshaft pulley (RH side) are aligned.
(2) Make sure single line (D) on exhaust cam
shaft pulley (RH side) is aligned to timing belt
cover notch (E).
(B)
(E)
(3) Make sure single line (A) on intake cam
shaft pulley (LH side) is aligned to timing belt
cover notch (B).
(4) Make sure double lines (C) on intake and
exhaust camshaft pulley (LH side) are aligned.
Timing Belt
(A)
(C)
(D)
PM-00533
PERIODIC MAINTENANCE SERVICES
(5) Make sure single line (D) on exhaust cam
shaft pulley (LH side) is aligned to timing belt
cover notch (E).
(A)
(C)
3) When camshaft pulley position is offset, check
for any defect and repair or replace as required.
4. DOHC MODEL (CHECK FOR OTHERS)
1) Remove the timing belt cover (LH).
2) While cranking engine at least four rotations,
check the timing belt back surface for cracks or
damage. Replace faulty timing belts with new parts
as required.
3) When the side part of timing belt (arrow direction
shown in the figure) is abnormally worn (fluff or
jumping out of core) or damaged, check the idlers,
tensioner, water pump pulley and cam sprocket to
determine idler alignment (squareness). Replace
the worn timing belt with new part.
4) Install the timing belt cover (LH).
PM-17
(B)
(E)
(D)
PM-00534
PM-00343