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2AZ-FE ENGINE MECHANICAL – CYLINDER HEADEM–73
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(c) Using a vernier caliper, measure the valve overall
length.
Standard overall length:
101.15 mm (3.9823 in.)
Minimum overall length:
100.70 mm (3.9646 in.)
If the overall length is less than the minimum,
replace the exhaust valve.
(d) Using a micrometer, measure the diameter of the
valve stem.
Standard valve stem diameter:
5.465 to 5.480 mm (0.2152 to 0.2158 in.)
If the overall length is less than the minimum,
replace the exhaust valve.
(e) Using a vernier caliper, measure the valve head
margin thickness.
Standard margin thickness:
1.40 mm (0.0551 in.)
Minimum margin thickness:
1.20 mm (0.0472 in.)
If the overall length is less than the minimum,
replace the exhaust valve.
14. INSPECT INTAKE VALVE GUIDE BUSH
(a) Using a caliper gauge, measure the inside diameter
of the guide bush.
Standard bush inside diameter:
5.510 to 5.530 mm (0.2169 to 0.2177 in.)
If the inside diameter is not as specified, replace the
intake valve guide bush.
(b) Subtract the valve stem diameter measurement
from the guide bush inside diameter measurement.
Standard oil clearance:
0.025 to 0.060 mm (0.0010 to 0.0024 in.)
Maximum oil clearance:
0.08 mm (0.0032 in.)
If the clearance is greater than the maximum,
replace the valve and intake guide bush.
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EM–742AZ-FE ENGINE MECHANICAL – CYLINDER HEAD
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15. INSPECT EXHAUST VALVE GUIDE BUSH
(a) Using a caliper gauge, measure the inside diameter
of the guide bush.
Standard bush inside diameter:
5.510 to 5.530 mm (0.2169 to 0.2177 in.)
If the inside diameter is not as specified, replace the
exhaust valve guide bush.
(b) Subtract the valve stem diameter measurement
from the guide bush inside diameter measurement.
Standard oil clearance:
0.030 to 0.065 mm (0.0012 to 0.0026 in.)
Maximum oil clearance:
0.10 mm (0.004 in.)
If the clearance is greater than the maximum,
replace the valve and exhaust valve guide bush.
16. INSPECT CYLINDER HEAD SET BOLT
(a) Using a vernier caliper, measure the length of the
head bolts from the seat to the end.
Standard bolt length:
141.3 to 142.7 mm (5.563 to 5.618 in.)
Maximum bolt length:
144.2 mm (5.677 in.)
If the bolt length is greater than the maximum,
replace the cylinder head set bolt.
17. INSPECT EXHAUST MANIFOLD
(a) Using a precision straightedge and a feeler gauge,
measure the surface contacting the cylinder head
for warpage.
Maximum warpage:
0.70 mm (0.028 in.)
If the warpage is greater than the maximum, replace
the exhaust manifold.
REPLACEMENT
1. REPLACE INTAKE VALVE GUIDE BUSH
(a) Heat the cylinder head to 80 to 100
C (176 to
212
F).
(b) Place the cylinder head on wooden blocks.
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2AZ-FE ENGINE MECHANICAL – CYLINDER HEADEM–75
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(c) Using SST and a hammer, tap out the guide bush.
SST 09201-10000 (09201-01050), 09950-70010
(09951-07100)
(d) Heat the cylinder head to 80 to 100
C (176 to
212
F).
(e) Place the cylinder head on wooden blocks.
(f) Using a caliper gauge, measure the bush bore
diameter of the cylinder head.
Standard diameter:
10.285 to 10.306 mm (0.4049 to 0.4058 in.)
If the bush bore diameter of the cylinder head is
greater than 10.306 mm (0.4058 in.), machine the
bush bore to the dimension of 10.335 to 10.365 mm
(0.4068 to 0.4077 in.).
Standard valve guide bush diameter
If the bushing bore diameter of the cylinder head is
greater than 10.394 mm (0.4092 in.), replace the
cylinder head.
(g) Using SST and a hammer, tap in a new guide bush
to the specified protrusion height.
SST 09201-10000 (09201-01050), 09950-70010
(09951-07100)
Standard protrusion height:
9.6 to 10.0 mm (0.378 to 0.394 in.)
A098136E01
A124781
A124782Condition Specified Condition
STD 10.333 to 10.344 mm (0.4068 to
0.4072 in.)
O/S
(0.05 mm)10.383 to 10.394 mm (0.4088 to
0.4092 in.)
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EM–762AZ-FE ENGINE MECHANICAL – CYLINDER HEAD
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(h) Using a sharp 5.5 mm reamer, ream the valve guide
bush to the standard specified clearance between
the valve guide bush and valve stem.
Standard oil clearance:
0.025 to 0.060 mm (0.0010 to 0.0024 in.)
2. REPLACE EXHAUST VALVE GUIDE BUSH
(a) Heat the cylinder head to 80 to 100
C (176 to
212
F).
(b) Place the cylinder head on wooden blocks.
(c) Using SST and a hammer, tap out the guide bush.
SST 09201-10000 (09201-01050), 09950-70010
(09951-07100)
(d) Heat the cylinder head to 80 to 100
C (176 to
212
F).
(e) Place the cylinder head on wooden blocks.
(f) Using a caliper gauge, measure the bush bore
diameter of the cylinder head.
Standard diameter:
10.285 to 10.306 mm (0.4049 to 0.4058 in.)
If the bush bore diameter of the cylinder head is
greater than 10.306 mm (0.4058 in.), machine the
bush bore to the dimension of 10.335 to 10.365 mm
(0.4068 to 0.4077 in.).
A124783
A124781
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A087006E03
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2AZ-FE ENGINE MECHANICAL – CYLINDER HEADEM–77
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Standard valve guide bush diameter
If the bushing bore diameter of the cylinder head is
greater than 10.394 mm (0.4092 in.), replace the
cylinder head.
(g) Using SST and a hammer, tap in a new guide bush
to the specified protrusion height.
SST 09201-10000 (09201-01050), 09950-70010
(09951-07100)
Standard protrusion height:
9.6 to 10.0 mm (0.378 to 0.394 in.)
(h) Using a sharp 5.5 mm reamer, ream the valve guide
bush to the standard specified clearance between
the valve guide bush and valve stem.
Standard oil clearance:
0.030 to 0.065 mm (0.0012 to 0.0026 in.)
3. REPLACE STUD BOLT
NOTICE:
If the stud bolt is deformed or threads are damaged,
replace it.
(a) Using E5 and E7 "torx" socket wrenches, remove
the 11 stud bolts.
Condition Specified Condition
STD 10.333 to 10.344 mm (0.4068 to
0.4072 in.)
O/S
(0.05 mm)10.383 to 10.394 mm (0.4088 to
0.4092 in.)
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EM–782AZ-FE ENGINE MECHANICAL – CYLINDER HEAD
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(b) Using E5 and E7 "torx" socket wrenches, install the
11 stud bolts.
4. REPLACE RING PIN
(a) Remove the 4 ring pins.
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2AZ-FE ENGINE MECHANICAL – CYLINDER HEADEM–79
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(b) Using a plastic-faced hammer, tap in 4 new ring pins
to the specified protrusion height.
Protrusion height:
3.0 mm (0.12 in.)
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EM–802AZ-FE ENGINE MECHANICAL – CYLINDER HEAD
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REASSEMBLY
HINT:
• Thoroughly clean all parts to be assembled.
• Before installing the parts, apply fresh engine oil to all
sliding and rotating surfaces.
• Replace oil seals with new ones.
1. INSTALL VALVE STEM OIL SEAL
(a) Using SST, push in a new oil seal.
SST 09201-41020
HINT:
The intake valve oil seal is gray and the exhaust
valve oil seal is black.
NOTICE:
Pay close attention when installing the intake
and exhaust oil seals. For example, installing
the intake oil seal into the exhaust or installing
the exhaust oil seal to the intake can cause
installation problems later.
2. INSTALL INTAKE VALVE
(a) Place the cylinder head on wooden blocks.
(b) Install the valve, seat, spring and retainer onto the
cylinder head.
(c) Using SST, compress the spring, and place the 2
retainer locks around the valve stem.
SST 09202-70020 (09202-00010)
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