Toyota B - Page 45

ENGINE
MECHANICAL
-
Cylinder
Head
EM-37
i
p
dead
mrbon
of the
essure
;aterial
rm
the
gasket
r all
the
I
i
6.
INSPECT CYLINDER
HEAD
FOR FLATNESS
Using
a
precision
straight edge
and thickness
gauge,
measure
the surfaces contacting
the cylinder
block and
manifolds for
warpage.
Maximum warpage:
Cylinder
block side O.2O
mm
(O.OO79
in.)
Manifold side O.2O
mm
(O.OO79
in.)
lf warpage is
greater
than
maximum, replace the head.
7. INSPECT
CYLINDER
HEAD FOR
CRACKS
Using
a dye
penetrant,
check the combustion
chamber,
intake
and
exhaust
ports,
head
surface
and the top of the
head for cracks.
lf cracked, replace the
head.
8. CLEAN
VALVES
(a)
Using a
gasket
scraper,
chip any carbon
from the
valve
head.
(b)
Using
a wire brush, thoroughly clean
the valve.
9.
INSPECT
VALVE
STEM
AND VALVE
GUIDE
BUSHING
(a)
Using
a
caliper
gauge
or telescoping
gauge,
measure
the inside diameter of the
valve
guide
bushing.
Bushing
inside
diameter:
9.O1O
-
9.030 mm
(O.3547
-
O.3555
in.)
EM6090
EM5991
EM5990
@
H
EM6073 EM6124
r head.