Toyota 1C Repair Manual page 61

ENGINE MECHANICAL - Cylinder Head
EM -55
112.12
6. INSPECT CYLINDER HEAD FOR FLATNESS
7.
8.
Using a precision straight edge and feeler gauge. measure
the surfaces contacting the cylinder block and manifold
for
warpage.
Maximum warpage:
Cylinder block side 0.2 mm (0.008 In.I
Manifold side 0.2 mm (0.008 In.)
If warpage is greater than maximum. replace the cylinder
head
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.
If a crack is found , replace the head.
CLEAN VALVES
(al Use a g asket scraper to chip any carbon from the
v alve head.
(b} Using a wire brush, clean the valve thoroughly.
9. INSPECT VALVE STEM OIL CLEARANCE
la}
Using a dial indicator or telescoping gauge. measure
the inside diameter of the valve guide bushing.