Valve Spring Inspection; Camshaft Inspection - Mazda 2006-2008 RX7 Engine Workshop Manual

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VALVE SPRING INSPECTION

1. Apply pressing force to the pressure spring and inspect the spring height.
• If it is less than the specification, replace the
valve spring.
Valve spring pressing force
390 N {39.76 kgf, 87.67 lbf}
Valve spring standard height H
28.68 mm {1.129 in}
2. Measure the out-of-square of the valve spring,
using a square, as shown in the figure.
(1) Rotate the valve spring one full turn and
measure "A" at the point where the gap is the
largest.
• If it exceeds the specification, replace the
valve spring.
Valve spring out-of-square (Maximum)
1.95 mm {0.0767 in}
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CAMSHAFT INSPECTION

1. Set the No.1 and No.5 journals on V-blocks.
2. Measure the camshaft runout.
• If it exceeds the specification, replace the
camshaft.
Maximum runout (Maximum)
0.03 mm {0.0012 in}
3. Measure the cam lobe height at the two points as
shown in the figure.
• If it is less than the specification, replace the
camshaft.
Camshaft standard height (mm {in})
With variable valve timing mechanism
IN: 42.44 {1.671}
EX: 41.18 {1.621}
Without variable valve timing mechanism
IN: 42.12 {1.659}
EX: 41.08 {1.618}
Camshaft minimum height (mm {in})
With variable valve timing mechanism
IN: 42.33 {1.666}
EX: 41.06 {1.616}
Without variable valve timing mechanism
IN: 42.01 {1.653}
EX: 40.96 {1.612}
MECHANICAL
UPPER
LOWER
E5U011012125E01
ADJ2224E028
A
B3E0110E073
E5U011012420E01
B3E0110E074
B3E0110E076
01–10–15
01–10