Mazda CX-7 2007 Workshop Manual page 400

(1) Using a suitable screwdriver or equivalent tool, unlock the chain tensioner ratchet.
(2) Rotate the exhaust camshaft clockwise using a suitable wrench on the cast hexagon and loosen the
tension on the timing chain.
(3) Using a suitable bolt (M6 X 1.0 length
25mm— 35mm {0.99— 1.3 in}) at the engine
front cover upper blind plug, secure the
tensioner arm at the position where the
tension is released.
15. Fix the exhaust camshaft using a wrench on the
cast hexagon, and loosen the camshaft sprocket
installation bolt.
16. Remove the installation bolt and remove the
exhaust camshaft sprocket.
17. Remove the oil control valve (OCV). (See01-10-
29 OIL CONTROL VALVE (OCV) REMOVAL/
INSTALLATION[L3 WITH TC].)
18. Loosen the camshaft cap bolts in two or three
passes in the order shown in the figure and
remove the camshaft cap.
Note
• The camshaft caps are to be kept ordered
for correct reassembly in their original
positions. Do not mix the caps.
19. Remove the camshafts for the intake and exhaust
sides.
20. Remove the tappet.
21. Install an appropriate tappet based on the results
of the valve clearance inspection.
Selected tappet = Removed tappet thickness + Measured valve clearance - Standard valve clearance
Standard valve clearance [Engine cold]
IN: 0.22— 0.28 mm {0.0087— 0.011 in}
EX: 0.27— 0.33 mm {0.011— 0.012 in}
22. Install the camshaft with No.1 cylinder cam aligned at TDC of the compression stroke.
01-10–6
MECHANICAL [L3 WITH TC]
RIB
EXHAUST
CAMSHAFT
SPROCKET
1 3 5
EX
No.1 No.2
IN
2
4 6
RIB
acxuuw00000160
acxuuw00000161
acxuuw00000162
4 2
No.3 No.4
3 1
5
acxuuw00000163