EM-93
ENGINE MECHANICAL - Cylinder Block
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 cylinder block.
3. INSPECT TOP OF CYLINDER BLOCK FOR FLATNESS
Using a precision straight edge and thickness gauge,
measure the surfaces contacting the cylinder head gasket
for warpage.
Maximum warpage: 0.20 mm (0.0079 in.)
If warpage is greater than maximum, replace the cylinder
block.
4. INSPECT CYLINDER FOR VERTICAL SCRATCHES
Visually check the cylinder for vertical scratches.
If deep scratches are present, rebore all five (1PZ) or six
(1HZ and 1HD-T) cylinders. If necessary, replace the
cylinder block.
5. INSPECT CYLINDER BORE DIAMETER
HINT: There are three sizes of the standard cylinder bore
diameter, marked "1", "2" and "3" accordingly. The mark is
stamped on the upper left rear of the cylinder block.
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