P12685
EM6368
P12400
Z09167
Cylinder Head Side
Air Intake Chamber Side
-
ENGINE MECHANICAL
CYLINDER HEAD
EM-51
994
Author:
Date:
2001 SIENNA (RM787U)
22.
INSPECT VALVE LIFTERS AND LIFTER BORES
(a)
Using a caliper gauge, measure the lifter bore diameter
of the cylinder head.
Lifter bore diameter:
31.000 - 31.018 mm (1.2205 - 1.2212 in.)
(b)
Using a micrometer, measure the lifter diameter.
Lifter diameter:
30.966 - 30.976 mm (1.2191 - 1.2195 in.)
(c)
Subtract the lifter diameter measurement from the lifter
bore diameter measurement.
Standard oil clearance:
0.024 - 0.050 mm (0.0009 - 0.0020 in.)
Maximum oil clearance: 0.07 mm (0.0028 in.)
If the oil clearance is greater than maximum, replace the lifter.
If necessary, replace the cylinder head.
23.
INSPECT AIR INTAKE CHAMBER
Using a precision straight edge and feeler gauge, measure the
surface contacting the intake manifold for warpage.
Maximum warpage: 0.10 mm (0.0039 in.)
If warpage is greater than maximum, replace the chamber.
24.
INSPECT INTAKE MANIFOLD
Using a precision straight edge and feeler gauge, measure the
surface contacting the cylinder head and air intake chamber for
warpage.
Maximum warpage:
Air intake chamber side: 0.15 mm (0.0059 in.)
Cylinder head side: 0.08 mm (0.0031 in.)
If warpage is greater than maximum, replace the manifold.