Toyota Celica Supra 1986 Service And Repair Manual page 46

EM-24
ENGINE MECHANICAl Cylinder Head
;;;::
5 . ClEAN CYUNDER HEAD
Using a soft brush and solvenl, clean the head.
CAUTION: Do not dean the head In a hot
...,k as this wll
. . riously
dama9•
it.
6 . CHECX HEAD FOR FlATNESS
7 .
Ia) Using a precrslon straight edge and feeler gauge.
cheek that neither the head nor manif"old surface is
warped.
lbl Measure warpage at the four sides and diagonally as
illustrated .
Maximum head tuf'f.ee w81pege:
0.10 mm 10.0039 ln.)
Maximum intake menifokt aurt.ce
w•
pege:
0.10 mm 10.0039 ln.)
Maximum ext.euat manifold surface
w_,.:
o. 10 mm 10.0039 ln.)
Maximum camshaft hou-'ng surface warpage:
0 .10 mm 10.0039 ln
.)
If warpage is greator than specified value. replace the head.
INSPECT CYLINDER HEAD FOR CRACKS
Using a dye peneuant. chack thecombustionchambor,ln·
take and exhaust porta, heed surface and the top of the
heed fOf
CJ11Ckl.
If
a
crack is found, replace the head.
8. ClEAN VAlVES
Use a gasket screpe' to chip any carbon from the vatve
head.
Using a wife brush, clean the vatve thoroughly.