Impreza F4-2.5L SOHC (2003)
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Be careful not to let oil, grease or coolant contact the belt. Remove quickly and thoroughly if this happens.
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Do not bend the belt sharply.
Bending radius: h 60 mm (2.36 inch) or more
AUTOMATIC BELT TENSION ADJUSTER
1) Visually check oil seals for leaks, and rod ends for abnormal wear or scratches. If necessary, replace faulty parts.
2) Check that the adjuster rod does not move when a pressure of 294 N (30 kgf, 66 lbs.) is applied to it. This is to check adjuster rod's stiffness.
3) If the adjuster rod is not stiff enough and moves freely when applying 294 N (30 kgf, 66 lbs.), check it using the following procedures:
1) Slowly press the adjuster rod down to the end surface of the cylinder. Repeat this motion 2 or 3 times.
2) With the adjuster rod moved all the way up, apply a pressure of 294 N (30 kgf, 66 lbs.) to it. Check adjuster rod's stiffness.
3) If the adjuster rod is not stiff enough and moves down, replace the automatic belt tension adjuster assembly with a new one.
CAUTION:
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Always use a vertical type pressing tool to move the adjuster rod down.
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Do not use a lateral type vise.
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Push the adjuster rod vertically.
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Press-in the push adjuster rod gradually taking more than 3 minutes.
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Do not allow press pressure to exceed 9,807 N (1,000 kgf, 2,205 lbs.).
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Press the adjuster rod as far as the end surface of the cylinder. Do not press the adjuster rod into the cylinder. Doing so may damage the
cylinder.
4) Measure the extension of rod beyond the body. If it is not within specifications, replace with a new one.
Rod extension: H 5.7 ± 0.5 mm (0.224 ± 0.020 inch)
BELT TENSION PULLEY
1) Check the mating surfaces of timing belt and contact point of adjuster rod for abnormal wear or scratches. Replace the automatic belt tension
adjuster assembly if faulty.
2) Check the tension pulley for smooth rotation. Replace if noise or excessive play is noted.
3) Check the tension pulley for grease leakage.
BELT IDLER
1) Check the belt idler for smooth rotation. Replace if noise or excessive play is noted.
2) Check the belt outer contacting surfaces of idler pulley for abnormal wear and scratches.
3) Check the belt idler for grease leakage.
