Toyota Supra 1990 Manual page 73

ENGINE MECHANICAL - Cylinder Head
EM-41
2
7
4
5 3 6
_
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EM2927
EX
0 0 OQ OQ QO 0 0 QQ
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IN
0 0 0 0 0 0 0 0 0 0 0 0
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No.1 No.2 No.3 No.4 No.5 No.6
EM5793
EM2929
EM2930
9. REMOVE BEARING CAPS AND CAMSHAFTS
(a) Loosen each bearing cap bolt a little at a time and in
the sequence shown in the figure.
(b) Remove the camshaft bearing caps, oil seal and
camshaft.
10.
REMOVE VALVE LIFTERS WITH SHIMS
HINT: Arrange the valve lifters and shims in order.
11. REMOVE VALVES
(a) Using SST, press the valve spring and remove the two
keepers.
SST 09202-70010
(b) Remove the spring retainer, valve spring, seat and
valve.
(c) Pry out the oil seal.
HINT: Arrange the valves, spring seats, valve springs and
retainers in correct order.
INSPECTION, CLEANING AND REPAIR OF
CYLINDER HEAD COMPONENTS
1. CLEAN TOP OF PISTONS AND TOP OF CYLINDER BLOCK
(a) Turn the crankshaft and bring each piston to top dead
center. Using a gasket scraper, remove all the carbon
from the piston tops.
(b) Using a gasket scraper, remove all gasket material
from the top of the block. Blow carbon and oil from
the bolt holes.
CAUTION: Protect your eyes when using compressed air.
2. REMOVE GASKET MATERIAL
Using a gasket scraper, remove all gasket material from
the head and manifold surfaces.
NOTICE: Be careful not to scratch the surfaces.