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14–136
1.0 – 1.4 mm
(0.039 – 0.055 in.)
2004 COROLLA (RM1037U)
ENGINE MECHANICAL
–
8.
INSPECT CYLINDER HEAD FOR CRACKS
(a)
Using a dye penetrate, check the combustion chamber,
intake ports, exhaust ports and cylinder block surface for
cracks.
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9.
INSPECT VALVE SEATS
(a)
Apply a light coat of prussian blue (or white lead) to the
valve face.
(b)
Lightly press the valve against the seat.
NOTICE:
Do not rotate valve.
Width
(c)
Check the valve face and seat according to the following
procedure.
(1)
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(2)
(3)
10.
REPAIR VALVE SEATS
NOTICE:
45_
Take off a cutter gradually to make smooth valve seats.
(a)
If the seating is too high on the valve face, use 30_ and
30_
45_ cutters to correct the seat.
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CYLINDER HEAD ASSY
If blue appears 360_ around the face, the valve is
concentric. If not, replace the valve.
If blue appears 360_ around the valve seat, the
guide and face are concentric. If not, resurface the
seat.
Check that the seat contact is in the middle of the
valve face with the width between 1.0 – 1.4 mm
(0.039 – 0.055 in.).
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