Cylinder Head - Subaru XT 1988 Service Manual

ENGINE
2-3
Cylinder Head
REMOVAL
1)
Remove timing belt, belt cover and related parts.
(Refer to "Timing Belt and Belt Cover".)
2)
Remove camshaft cases, lash adjuster and related parts.
(Refer to "Camshaft and Valve Rocker".)
3)
Remove bolt attaching alternator bracket to cylinder
head. [Except air conditioner model]
4)
Remove bolt attaching adjusting bar to cylinder head.
[Except air conditioner model1
5)
Remove bolts attaching intake manifold to cylinder head,
and then lift intake manifold from cylinder head.
Fig.
46
6)
Remove bolt attach ing water by·pass pipe bracket to
cylinder head.
Fig. 47
27
7) Remove spark plugs.
8)
Remove cylinder heads and gaskets from cylinder block.
9) Using VALVE SPRING PRESS ASSY (899724100),
compress the valve spring and remove the valve spring retainer
key. Remove each valve and valve spring.
a. Mark each valve to prevent confusion.
b. Use extreme care not to damage the lips of the intake valve
oil seals and exhaust valve oil seals.
Fig.
48
INSPECTION
CYLINDER HEAD
VALVE SPRING
PRESS ASSY
L2-469
1)
Make sure that no crack or other damage exists. In
addition to visual inspection, inspect important areas by means
of red check.
2)
Measure the warping of the cylinder head surface that
mates with crankcase by using a straight edge and th ickness
gauge.
If the warping exceeds 0.05 mm (0.0020 in), regrind the
surface with a surface grinder.
Warping limit:
0.05 mm (0.0020 in)
Grinding limit:
0.3 mm (0.012 in)
Standard height of cylinder head:
90.6 mm (3.567 in)