Toyota T100 1996 Service Manual page 768

1996 TOYOTA T100 (RM449U)
ENGINE MECHANICAL (3RZ−FE)
20.
(a)
(b)
If the thrust clearance is greater than maximum, replace the
P14708
camshaft. If necessary, replace the bearing caps and cylinder
head as a set.
21.
(a)
(b)
P14706
If the backlash is greater than maximum, replace the cam-
shafts.
22.
(a)
(b)
P14650
(c)
If the oil clearance is greater than maximum, replace the lifter.
If necessary, replace the cylinder head.
EM2196
23.
Using a precision straight edge and thickness gauge, measure
the surface contacting the intake manifold for warpage.
If warpage is greater than maximum, replace the air intake
chamber.
P14624
− CYLINDER HEAD
INSPECT CAMSHAFT THRUST CLEARANCE
Install the camshaft (See page EM−50).
Using a dial indicator, measure the thrust clearance while
moving the camshaft back and forth.
Standard thrust clearance:
0.040 − 0.095 mm (0.0016 − 0.0037 in.)
Maximum thrust clearance:
0.12 mm (0.0047 in.)
INSPECT CAMSHAFT GEAR BACKLASH
Install the camshafts without installing the exhaust cam
sub−gear (See page EM−50).
Using a dial indicator, measure the backlash.
Standard backlash:
0.020 − 0.200 mm (0.0008 − 0.0079 in.)
Maximum backlash:
0.30 mm (0.0188 in.)
INSPECT VALVE LIFTERS AND LIFTER BORES
Using a caliper gauge, measure the lifter bore diameter
of the cylinder head.
Lifter bore diameter:
31.000 − 31.016 mm (1.2205 − 1.2211 in.)
Using a micrometer, measure the lifter diameter.
Lifter diameter:
30.966 − 30.976 mm (1.1578 − 1.2195 in.)
Subtract the lifter diameter measurement from the lifter
bore diameter measurement.
Standard oil clearance:
0.024 − 0.055 mm (0.0009 − 0.0022 in.)
Maximum oil clearance:
0.07 mm (0.0028 in.)
INSPECT AIR INTAKE CHAMBER
Maximum warpage: 0.20 mm (0.0078 in.)
EM−45