Toyota Celica Supra 1986 Service And Repair Manual page 47

ENGINE MECHANICAL - Cylinder Head
EM·25
9. INSPECT VALVE STEM GUIDE WEAR
Ia) Using a dial indicator or telescoping gauge, measure
the insi de diameter of the vatve guide.
Standard lnoide
cllemeter:
8 .01 -
8 .03 mm
10 .3154 - 0 .3181
ln.)
(b) UHlg a micrometat. measure the diameter of the velva
stem.
St....S.d valve atom dl-er:
lntelce 7 .970 - 7.985 mm
10.3138 - 0 .3144 in.)
Eol\aust 7 .9115 - 7.980 mm
(0.31
311 -
0 .3142 ln.)
(cl Subtract the valve stem measurement I rom the valve
guide measurement.
L-==~----------'""2: ~ "'~
Standard oil clearance:
Intake 0 .025 - 0 .060 mm
(0.00 10 - 0 .0024
ln.)
Eol\auot 0 .030 - 0 .065 mm
(0 .0012 - 0 .00261n.l
Maximum
ol d
.. rance:
Intake 0.06 mm 10.0031 in.)
Exhaust
0 . 10 mm 1 0 .0039 ln .l
If the clearance is greater than following values, replace
the valve and guide:
10. IF NECESSARY. REPlACE VALVE GUIDE
Cal
Bra~he
valve gukte using a brass bar and hammer.
lbl Heat the cylinder hee.d to appro><. 90° C 1194 °FJ.
(e) Using SST and a hammer, drive out the valve guide.
SST 09201 ·6001 1