Subaru IMPREZA GD 2007 Series Manual page 2456

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12) Install the timing
ME(H4DOTC)-47, INSTALLATION, Timing Belt
Cover.>
13) Install the crank pulley. <Ref. to ME(H4DOTC)-
46, INSTALLATION, Crank Pulley.>
14) Install the V-belts. <Ref. to ME(H4DOTC)-44,
INSTALLATION, V-belt.>
C: INSPECTION
1. TIMING BELT
1) Check the timing belt teeth for breaks, cracks or
wear. If any fault is found, replace the timing belt.
2) Check the condition on the back surface of the
timing belt. If cracks are found, replace the timing
belt.
CAUTION:
• Be careful not to let oil, grease or engine
coolant contact the timing belt. Remove quickly
and thoroughly if this happens.
• Do not bend the timing belt sharply.
In radial diameter h:
60 mm (2.36 in) or more
h
2. AUTOMATIC BELT TENSION ADJUSTER
1) Visually check the oil seals for leaks, and rod
ends for uneven wear and scratches. If necessary,
replace the automatic belt tension adjuster assem-
bly.
NOTE:
Slight traces of oil at rod's oil seal does not indicate
a problem.
2) Check that the adjuster rod does not move when
a pressure of 165 N (16.8 kgf, 37.1 lbf) is applied to
it. This is to check the adjuster rod stiffness.
3) If the adjuster rod is not stiff and moves freely
when applying 165 N (16.8 kgf, 37.1 lbf), check it
using the following procedures:
(1) Slowly press the adjuster rod down to the
end surface of cylinder. Repeat this operation
two to three times.
(2) With the adjuster rod extended all the way
up, apply a pressure of 165 N (16.8 kgf, 37.1 lbf)
to it to inspect the stiffness of the adjuster rod.
Timing Belt
belt cover. <Ref. to
ME-00099
ME(H4DOTC)-55
(3) If the adjuster rod is not stiff and compress-
es downward, replace the automatic belt ten-
sion adjuster assembly.
CAUTION:
• Always use a vertical type pressing tool to
move the adjuster rod down.
• Do not use a lateral type vise.
• Push the adjuster rod vertically.
• Press-in the push adjuster rod gradually tak-
ing three minutes or more.
• Do not allow press pressure to exceed 9,807
N (1,000 kgf, 2,205 lbf).
• Push in the adjuster rod to the end face of the
cylinder. Do not push in the adjuster rod farther
than the end face of the cylinder. Doing so may
damage the cylinder.
4) Measure the amount of rod protrusion "H" be-
yond the body. If it is not within specifications, re-
place with a new part.
Amount of rod protrusion H:
5.2 — 6.2 mm (0.205 — 0.244 in)
H
5) Check the mating surfaces of timing belt and
contact point of adjuster rod for uneven wear or
scratches. Replace the automatic belt tension ad-
juster assembly if faulty.
6) Check the belt tension pulley for smooth rota-
tion. Replace if noise or excessive play occurs.
7) Check the belt tension pulley for grease leakage.
3. BELT IDLER
1) Check the belt idler for smooth rotation. Replace
if noise or excessive play occurs.
2) Check the outer contacting surface of idler pulley
for uneven wear and scratches.
3) Check the belt idler for grease leakage.
MECHANICAL
ME-00100