Subaru Impreza 2002 Service Manual page 751

PERIODIC MAINTENANCE SERVICES
B: INSTALLATION
1. SOHC MODEL
Install in the reverse order of removal. <Ref. to ME-
49, Timing Belt Assembly.>
2. DOHC MODEL
Install in the reverse order of removal. <Ref. to
ME(TURBO)-48, Timing Belt Assembly.>
CAUTION:
When installing the timing belt, be sure to align
all alignment marks on the belt with corre-
sponding marks on the sprockets. If incorrectly
installed, interference between pistons and
valves may occur.
CAMSHAFT DRIVE BELT
C: INSPECTION
1. SOHC MODEL
1) Remove the belt covers (RH) and (LH).
2) While cranking the engine at least four rotations,
check the timing belt back surface for cracks or
damage. Replace the faulty timing belt as needed.
3) Measure the timing belt width W. If it is less than
27 mm (1.06 in), check idlers, tensioner, water
pump pulley and cam sprocket to determine idler
alignment (squareness). Replace the worn timing
belt.
4) Install the belt covers (RH) and (LH).
2. DOHC MODEL
1) Remove the belt covers (RH) and (LH).
2) While cranking the engine at least four rotations,
check the timing belt back surface for cracks or
damage. Replace the faulty timing belt as needed.
3) Measure the timing belt width W. If it is less than
30 mm (1.18 in), check idlers, tensioner, water
pump pulley and cam sprocket to determine idler
alignment (squareness). Replace the worn timing
belt.
4) Install the belt covers (RH) and (LH).
PM-14
w
GI0142
W
GI0143