Mazda 2006-2008 RX7 Engine - Page 38

MECHANICAL
01–10–24
7. Hold the exhaust camshaft using a suitable
wrench on the cast hexagon as shown in the
figure.
8. Remove the exhaust camshaft sprocket.
9. Loosen the camshaft cap bolts in several passes
in the order shown in the figure.
Note
• The cylinder head and the camshaft caps
are numbered to make sure they are
reassembled in their original position. When
removed, keep the caps with the cylinder
head they were removed from. Do not mix
the caps.
10. Remove the camshaft.
11. Remove the tappet.
12. Select proper adjustment shim.
New adjustment shim
= Removed shim thickness + Measured valve clearance - Standard valve clearance (IN: 0.25 mm
{0.0098 in}, EX: 0.30 mm {0.0118 in})
Valve clearance [Engine cold]
IN: 0.22—0.28 mm {0.0087—0.0110 in}
EX: 0.27—0.33 mm {0.0106—0.0130 in}
13. Install the camshaft with No.1 cylinder aligned with the TDC position.
14. Tighten the camshaft cap bolt using the following
two steps.
Tightening torque
(1) 5.0—9.0 N·m
{51.0—91.7 kgf·cm, 44.3—79.5 in·lbf}
(2)14.0—17.0 N·m
{1.43—1.73 kgf·m, 10.4—12.5 ft·lbf}
B3E0110E095
EXHAUST
CAMSHAFT
SPROCKET
B3E0110E097
9
8
7
5
43
1
2
10
19
18
17
15
16
1413
11
12
20
6
B3E0110E057
9
8
7
5
4
3
1
2
10
19
18
17
15
16
14
13
11
12
20
6
B3E0110E098