Subaru Legacy 2004 Service Manual page 290

MECHANICAL
Color of spring part:
Intake [Silver]
Exhaust [Silver]
ST2
F: ADJUSTMENT
1. CYLINDER HEAD
1) Make sure that no crack or other damage do not
exist. In addition to visual inspection, inspect impor-
tant areas by means of red lead check.
Also make sure the gasket installing surface shows
no trace of gas and water leaks.
2) Place the cylinder head on the ST.
ST 498267800 CYLINDER HEAD TABLE
3) Measure the warping of the cylinder head sur-
face that mates with crankcase using a straight
edge and thickness gauge.
If the warping exceeds the limit, regrind the surface
with a surface grinder.
Warping limit:
0.03 mm (0.0012 in)
Grinding limit:
0.1 mm (0.004 in)
Standard height of cylinder head:
97.5 mm (3.839 in)
NOTE:
Uneven torque for the cylinder head bolts can
cause warping. When reassembling, pay special
attention to the torque so as to tighten evenly.
ST
(A) Straight edge
(B) Thickness gauge
Cylinder Head
ST1
ME-00284
(A)
(B)
ME-00285
ME(H4SO 2.0)-60
2. VALVE SEAT
Inspect the intake and exhaust valve seats, and
correct the contact surfaces with a valve seat cutter
if they are defective or when valve guides are re-
placed.
Valve seat width W:
Standard
Intake (A)
0.8 — 1.4 mm (0.03 — 0.055 in)
Exhaust (B)
1.2 — 1.8 mm (0.047 — 0.071 in)
(A)
3. VALVE GUIDE
1) Check the clearance between valve guide and
stem. The clearance can be checked by measuring
respectively the outer diameter of valve stem and
inner diameter of valve guide with a micrometer.
(B)
ME-00397
ME-00287