Toyota 2VZ-FE Manual page 81

ENGINE MECHANICAL – Cylinder Block
INSPECTION OF PISTON AND
CONNECTING ROD ASSEMBLIES
1. CLEAN PISTON
(a) Using a gasket scraper, remove the carbon from the
piston top.
(b) Using a groove cleaning or broken ring, clean the piston
ring grooves.
(c) Using solvent and a brush, thoroughly clean the piston.
NOTICE: Do not use a wire brush.
2. INSPECT PISTON DIAMETER AND OIL CLEARANCE
HINT: There are three sizes of the standard diameter, marked
"1", "2" and "3" accordingly. The mark is stamped on the top
of the piston.
(a) Using a micrometer, measure the piston diameter at
right angles to the piston pin center line, 24.25 mm
(0.9547 in.) from the piston head.
Piston diameter:
STD Mark "1" 87.445–87.455 mm
STD Mark "2" 87.455–87.465 mm
STD Mark "3" 87.465–87.475 mm
O/S 0.50
(b) Measure the cylinder bore diameter in the thrust
directions. (See step 5 on page EM–77)
(c) Subtract the piston diameter measurement from the
cylinder bore diameter measurement.
Standard oil clearance:
Maximum oil clearance:
If the oil clearance is greater than maximum, replace all the
six pistons. If necessary, rebore all the six cylinders or replace
the cylinder block.
(3.4427–3.4431 in.)
(3.4431–3.4435 in.)
(3.4435–3.4439 in.)
87.945–87.975 mm
(3.4624–3.4636 in.)
0.045–0.065 mm
(0.0018–0.0026 in.)
0.085 mm (0.0033 in.)
EM-79