Impreza WRX STI F4-2.5L Turbo (2008)
1) Temporarily tighten the bolts mounting the timing belt guide.
NOTE:
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Before attaching the bolts, clean the bolt holes of the timing belt cover.
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Apply liquid gasket to the threaded portion of cam sprocket. (when reuse the bolts)
Liquid gasket: THREE BOND 1324 (Part No. 004403042) or equivalent
2) Check and adjust the clearance between timing belt and timing belt guide using a thickness gauge.
Clearance: 1.0:±0.5 mm (0.039±0.020 inch)
