Toyota FJ Cruiser (GSJ 10, 15 series). Manual — part 161
1GR-FE ENGINE MECHANICAL – CYLINDER HEAD
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(c) Using a valve guide bushing brush and solvent,
clean all the valve guide bushes.
(d) Using a soft brush and solvent, thoroughly clean the
cylinder head.
3.
INSPECT CYLINDER HEAD SUB-ASSEMBLY
(a) Inspect the cylinder head for warpage.
(1) Using a precision straight edge and feeler
gauge, measure the warpage on the cylinder
block side and the intake and exhaust sides.
Maximum warpage:
0.10 mm (0.0039 in.)
If the warpage is greater than the maximum,
replace the cylinder head.
A075607E01
A075608E01
Cylinder Block Side:
Intake Manifold Side:
Exhaust Manifold Side:
A075609E03
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1GR-FE ENGINE MECHANICAL – CYLINDER HEAD
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(b) Inspect the cylinder head for cracks.
(1) Using a dye penetrant, check the combustion
chamber, intake ports, exhaust ports and
cylinder block surface for cracks.
If cracked, replace the cylinder head.
4.
CLEAN VALVE
(a) Using a gasket scraper, chip off any carbon from the
valve head.
(b) Using a wire brush, thoroughly clean the valve.
5.
INSPECT VALVE
(a) Inspect the valve stem diameter.
(1) Using a micrometer, measure the diameter of
the valve stem.
Valve stem diameter
(b) Inspect the valve face angle.
(1) Grind the valve enough to remove any pits and
carbon.
(2) Check that the valve is ground to the correct
valve face angle.
Valve face angle:
45.5
°
(c) Inspect the valve head margin thickness.
(1) Using vernier calipers, check the valve head
margin thickness.
Standard margin thickness:
1.0 mm (0.039 in.)
Minimum margin thickness:
0.5 mm (0.020 in.)
If the margin thickness is less than the
minimum, replace the valve.
A075610E01
EM00580E01
A032770E01
Valve Stem
Specification
Intake
5.470 to 5.485 mm (0.2154 to 0.2159 in.)
Exhaust
5.465 to 5.480 mm (0.2152 to 0.2158 in.)
45.5 °
A075611E03
Margin
Thickness
EM00181E02
1GR-FE ENGINE MECHANICAL – CYLINDER HEAD
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(d) Inspect the overall length.
(1) Using vernier calipers, check the overall length.
Standard overall length
Minimum overall length
If the overall length is less than the minimum,
replace the valve.
(e) Inspect the valve stem tip.
(1) Check the surface of the valve stem tip for
wear.
NOTICE:
Do not grind to less than the minimum
length.
If the valve stem tip is worn, resurface the tip
with a grinder or replace the valve.
6.
CLEAN VALVE SEAT
(a) Using a 45
° carbide cutter, resurface the valve
seats.
(b) Clean the valve seats.
7.
INSPECT VALVE SEAT
(a) Apply a light coat of prussian blue to the valve face.
(b) Lightly press the valve against the valve seat.
NOTICE:
Do not rotate the valve.
(c) Check the valve face and seat according to the
following procedure.
(1) If blue appears 360
° around the face, the valve
is concentric.
If not, replace the valve.
(2) If the blue appears 360
° around the valve seat,
the guide and face are concentric.
If not, resurface the valve seat.
(3) Check that the seat is in contact with the middle
of the valve face with the following width.
Standard width:
1.0 to 1.4 mm (0.039 to 0.055 in.)
Overall
Length
EM02534E08
Valve
Specification
Intake
106.95 mm (4.2106 in.)
Exhaust
105.80 mm (4.1654 in.)
Valve
Specification
Intake
106.70 mm (4.2008 in.)
Exhaust
105.55 mm (4.1555 in.)
EM00255E01
A075612E01
Width
P012729E01
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8.
INSPECT INNER COMPRESSION SPRING
(a) Inspect the deviation.
(1) Using steel squares, measure the deviation of
the inner compression spring.
Maximum deviation:
2.0 mm (0.079 in.)
If the deviation is greater than the maximum,
replace the inner compression spring.
(b) Inspect the free length.
(1) Using vernier calipers, measure the free length
of the inner compression spring.
Free length:
47.80 mm (1.8819 in.)
If the free length is not as specified, replace the
inner compression spring.
(c) Inspect the tension.
(1) Using a spring tester, measure the tension of
the inner compression spring at the specified
installed length.
Installed tension
If the installed tension is not as specified,
replace the inner compression spring.
9.
INSPECT VALVE GUIDE BUSH OIL CLEARANCE
(a) Using a caliper gauge, measure the internal
diameter of the valve guide bush.
Inside diameter:
5.51 to 5.53 mm (0.2169 to 0.2177 in.)
(b) Subtract the valve stem diameter measurement
from the valve guide bush internal diameter
measurement.
Standard oil clearance
Maximum oil clearance
If the oil clearance is greater than the maximum,
replace the valve and valve guide bush.
EM00988E03
EM00801E01
EM00281E01
Installed Length
Specification
33.3 mm (1.311 in.)
186.2 to 205.8 N (19.0 to 21.0 kgf, 41.9 to 46.3
lbf)
A075615E02
Valve Guide Bush
Specification
Intake
0.025 to 0.060 mm (0.0010 to 0.0024 in.)
Exhaust
0.030 to 0.065 mm (0.0012 to 0.0026 in.)
Valve Guide Bush
Specification
Intake
0.08 mm (0.0031 in.)
Exhaust
0.10 mm (0.0039 in..)
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