Toyota Supra 1990 Manual page 106

EM-74
ENGINE MECHANICAL - Cylinder Block
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Front _ 2 Direction
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Direction
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A (0.39 in.)
B Middle
C 10mm
EM1818
EM4534
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10mm
(0.39 in.)
EM0086
EM0365
INSPECTION OF CYLINDER BLOCK
1. REMOVE GASKET MATERIAL
Using a gasket scraper, remove all the gasket material from
the cylinder block surface.
2. CLEAN CYLINDER BLOCK
Using a soft brush and solvent, clean the block.
3. INSPECT TOP OF CYLINDER BLOCK FOR FLATNESS
Using a precision straight edge and thickness gauge, meas-
ure the surfaces contacting the cylinder head gasket for
warpage.
Maximum warpage: 0.05 mm (0.0020 in.)
If warpage is greater than maximum, replace the cylinder
block.
4. INSPECT CYLINDERS FOR VERTICAL SCRATCHES
Visually check the cylinder for vertical scratches.
If deep scratches are present, rebore all six cylinders. If
necessary, replace the cylinder block.
5. INSPECT CYLINDER BORE DIAMETER
Using a cylinder gauge, measure the cylinder bore diameter
at positions A, Band C in the thrust and axial directions.