Toyota Celica Supra 1986 Service And Repair Manual page 48

EM·21 ENGINE MECHANICAL - Cylinder Head
8oth intake and exhaust
Guido bo<o mm Cin.l
13.()()().13.027
10.6118.0.51 291
Ovor
13.027
10.61291
Guido
ol<o
u .. sro
u ..
0/S 0.05
Snap
Rlnv
(d) Using a caliper gouae. measure th<l valve guide bore
of the cylinder h<lad.
(e) Select a new valve guide.
If the valve guide bore of the cylinder head ;, more than
13.027 mm (0.5 1291n.). machine the bore to the follow·
lng dimensions.
Rebored
valve guide
buohlng
bore dloo-lion
(cold ):
13.0 6· 13.077 mm 10.6138·0.6148
ln.)
(I)
Heat the cylinder head to about 90°C C 194° F).
(g)
Using SST end
1
hammer.
drive in the
new
valve guide
until
th~nap
ring makes contact w ith the c:yUnder
h<lad.
SST 0920Hl0011
(h) Using a sharp S.mm reamer. ream
the
valve guk:Se to
obtain spedfied
cle~rence
between the guide ond new
valve.
Stendard oil ........,.,
Intake: 0.026 - 0.060 mm
(0.0010 - 0 .0024 ln.)
Exheuat: 0.030 - 0.066 mm
(0.0012 - 0.0026 ln.)
INSPECT AND GRIND VA LVES
(a) Grind valves onty enough to remove pits and carbon.
M ake sure
the
valves are ground at the correct vatve
face angle.
Valve f ace ongle: 44.6 °