Impreza WRX STI F4-2.5L Turbo (2008)
15) Loosen the front camshaft cap upper area and intake camshaft cap bolts equally, a little at a time in alphabetical order as shown in the figure.
16) Loosen the front camshaft cap lower area and exhaust camshaft cap bolts equally, a little at a time in alphabetical order as shown in the figure.
17) Remove the front camshaft cap.
18) Remove the intake camshaft caps and intake camshaft.
19) Remove the exhaust camshaft caps and exhaust camshaft.
NOTE: Arrange camshaft caps in order so that they can be installed in their original positions.
20) Remove the oil seal.
NOTE: Do not scratch the journal surface when removing the oil seal.
21) Similarly, remove the camshaft RH and related parts.
INSTALLATION
1) Install the camshaft.
Apply engine oil to the cylinder head at camshaft journal installation location before installing the camshaft. Install the camshaft so that each valve is
close to or in contact with base circle of the cam lobe.
NOTE:
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Set the camshaft to the position shown in the figure.
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When set at the position shown in the figure, it is not necessary to rotate camshaft RH when installing the timing belt, but it is necessary to rotate
camshaft LH slightly.
