Mazda 2006-2008 RX7 Engine, Руководство по ремонту

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MECHANICAL
01–10–14
2. Tap the valve guide in from the top of the cylinder
head until the SSTs contacts the cylinder head.
3. Verify that the valve guide protrusion height
(dimension A) is within the specification.
Valve guide protrusion height (standard)
12.2—12.8 mm {0.481—0.503 in}
End Of Sie
VALVE SEAT INSPECTION/REPAIR
E5U011010102E01
1. Measure the seat contact width.
•
If not within the specification, resurface the
valve seat using a
45
°
valve seat cutter and/or
resurface the valve face.
Valve seat contact width (Standard)
1.2—1.6 mm {0.048—0.062 in}
2. Verify that the valve seating position is at the
center of the valve face.
(1) If the seating position is too out side, correct
the valve seat using a 70
°
(IN) or 65
°
(EX)
cutter, and a 45
°
cutter.
(2) If the seating position is too inner side, correct
the valve seat using a 35
°
(IN) cutter, and a
30
°
(EX) cutter, and a 45
°
cutter.
3. Inspect the sinking of the valve seat. Measure the
protruding length (dimension L) of the valve stem.
•
If not specified, replace the cylinder head.
Valve protrusion height (Standard)
IN: 40.64—42.24 mm {1.600—1.662 in}
EX: 40.50—42.10 mm {1.595—1.657 in}
49 L012 004A
49 L012 003A
49 L012 002A
VALVE GUIDE
B3E0110E072
A
VALVE GUIDE
CYLINDER HEAD
C3U0110E004
SEAT CONTACT
WIDTH
ADA2224E019
IN
70
°
45
°
35
°
EX
65
°
45
°
30
°
B3E0110E133
L
C3U0110E006