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14–140
SST
2004 COROLLA (RM1037U)
ENGINE MECHANICAL
–
(b)
Subtract the valve stem diameter measurement from the
guide bushing inside diameter measurement.
Standard oil clearance:
Intake 0.025 – 0.060 mm (0.0010 – 0.0024 in.)
Exhaust 0.030 – 0.065 mm (0.0012 – 0.0026 in.)
Maximum oil clearance:
Intake 0.08 mm (0.0032 in.)
Exhaust 0.10 mm (0.0039 in.)
If the oil clearance is greater than maximum, replace the valve
and valve guide bushing.
18.
REPLACE VALVE GUIDE BUSHING
(a)
Heat the cylinder head to 80 – 100_C (176 – 212_F).
A62906
(b)
Place the cylinder head on the wooden blocks.
(c)
Using SST, tap out the valve guide bushing.
SST
Wooden
Block
A65693
(d)
Using a caliper gauge, measure the bushing bore diame-
ter of the cylinder head.
Diameter: 10.285 – 10.306 mm (0.4049 – 0.4058 in.)
If the bushing bore diameter of the cylinder head is greater than
10.306 mm (0.4058 in.), machine the bushing bore to the di-
mension of 10.335 – 10.356 mm (0.4069 – 0.4077 in.) to install
a over size valve guide bushing.
HINT:
Valve guide bushing size
A62908
CYLINDER HEAD ASSY
09201–10000, 09201–01055, 09950–70010
(09951–07100)
STD
10.285 – 10.306 (0.4049 – 0.4058)
O/S 0.05
10.335 – 10.356 (0.4069 – 0.4077)
Bushing bore diameter mm (in.)
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