Toyota T100 1996 Service Manual page 922

EM−94
1996 TOYOTA T100 (RM449U)
ENGINE MECHANICAL (5VZ−FE)
(c)
NOTICE:
Do not use a wire brush.
P21448
8.
Mark
1, 2 or 3 Front
HINT:
Mark
There are 3 sizes of the standard piston diameter, marked "1",
(Cavity)
"2" and "3" accordingly. The mark is stamped on the piston top.
(a)
26 mm
Z14705
(b)
(c)
If the oil clearance is greater than maximum, replace all the 6
pistons. If necessary, rebore all the 6 cylinders or replace the
cylinder block.
HINT:
Use new cylinder block: Use a piston with the same number
mark as the standard bore diameter marked on the cylinder
block.
9.
Using a feeler gauge, measure the clearance between new pis-
ton ring and the wall of the piston ring groove.
If the clearance not as specified, replace the piston.
P21456
− CYLINDER BLOCK
Using solvent and a brush, thoroughly clean the piston.
INSPECT PISTON OIL CLEARANCE
Using a micrometer, measure the piston diameter at right
angles to the piston pin center line, 26 mm (1.02 in.) from
the piston head.
Piston diameter:
STD Mark "1"
STD Mark "2"
STD Mark "3"
O/S 0.50
Measure the cylinder bore diameter in the thrust direc-
tions (See step 5.).
Subtract the piston diameter measurement from the cylin-
der bore diameter measurement.
Standard oil clearance:
0.134 − 0.154 mm (0.0053 − 0.0060 in.)
Maximum oil clearance:
0.174 mm (0.0069 in.)
INSPECT PISTON RING GROOVE CLEARANCE
Standard ring groove clearance:
No.1
No.2
93.356 − 93.366 mm (3.6754 − 3.6758 in.)
93.367 − 93.376 mm (3.6759 − 3.6762 in.)
93.377 − 93.386 mm (3.6763 − 3.6766 in.)
93.856 − 93.886 mm (3.6951 − 3.6963 in.)
0.040 − 0.080 mm (0.0016 − 0.0031 in.)
0.030 − 0.070 mm (0.0012 − 0.0028 in.)