Toyota T100 1996 Service Manual page 809

EM−86
1996 TOYOTA T100 (RM449U)
ENGINE MECHANICAL (3RZ−FE)
(c)
NOTICE:
Do not use a wire brush.
A03810
9.
(a)
P14765
(b)
(c)
If the oil clearance is greater than maximum, replace all the 4
pistons and rebore all the 4 cylinders. If necessary, replace the
cylinder block.
HINT:
Use new cylinder block: Use a piston with the same number
mark as the cylinder bore diameter marked on the cylinder
block.
10.
Using a thickness gauge, measure the clearance between new
piston ring and the wall of the piston ring groove.
If the clearance is not as specified, replace the piston.
P14821
− 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, 37.5 mm (1.47 in.)
from the piston head.
Piston diameter:
STD
94.933 − 94.943 mm (3.7375 − 3.7379 in.)
O/S 0.50
95.433 − 95.443 mm (3.7572 − 3.7576 in.)
Measure the cylinder bore diameter in the thrust direc-
tions (See step 4.).
Subtract the piston diameter measurement from the cylin-
der bore diameter measurement.
Standard oil clearance:
0.047 − 0.070 mm (0.0019 − 0.0028 in.)
INSPECT PISTON RING GROOVE CLEARANCE
Ring groove clearance:
No.1
0.020 − 0.070 mm (0.0008 − 0.0028 in.)
No.2
0.030 − 0.070 mm (0.0012 − 0.0028 in.)