Subaru 2001 IMPREZA Service Manual page 65

MECHANICAL
Warping limit:
0.05 mm (0.0020 in)
Grinding limit:
0.1 mm (0.004 in)
Standard height of cylinder head:
97.5 mm (3.839 in)
CAUTION:
Uneven torque for the cylinder head bolts can
cause warping. When reassembling, pay spe-
cial attention to the torque so as to tighten
evenly.
CYLINDER HEAD ASSEMBLY
G2M0148
ME(SOHC)-64
2. VALVE SEAT
Inspect intake and exhaust valve seats, and correct
the contact surfaces with valve seat cutter if they
are defective or when valve guides are replaced.
Valve seat width: W
Intake
Standard 1.0 mm (0.039 in)
Limit 1.7 mm (0.067 in)
Exhaust
Standard 1.4 mm (0.055 in)
Limit 2.1 mm (0.083 in)
G2M0149
B2M0074