Impreza GT F4-2.5L Turbo (2009)
7) Measure the oil clearance of camshaft journal.
1) Clean the camshaft cap and the camshaft journal of the cylinder head.
2) Place the camshaft on the cylinder head. (Without installing the valve lifter)
3) Place a plastigauge across each camshaft journals.
4) Gradually tighten the camshaft cap in at least two steps, in alphabetical order shown in the figure, and then tighten to the specified torque. Do
not turn the camshaft.
Tightening torque:
T1: 9.75 Nm (1.0 kgf-m, 7.2 ft-lb)
T2: 20 Nm (2.0 kgf-m, 14.8 ft-lb)
5) Remove the camshaft cap.
6) Measure the widest point of the plastigauge on each journal. If oil clearance exceeds the standard, replace the camshaft. If necessary, replace
the camshaft caps and cylinder head as a set.
Camshaft oil clearance:
Standard
0.037 - 0.072 mm (0.0015 - 0.0028 in)
7) Completely remove the plastigauge.
8) Measure the thrust clearance with setting the dial gauge at end surface of camshaft. If the thrust clearance is not within the standard or there is
offset wear, replace the camshaft caps and cylinder head as a set. If necessary, replace the camshaft.
Camshaft thrust clearance:
Standard
0.068 - 0.116 mm (0.0027 - 0.0047 in)
