Mazdaspeed6 L4-2.3L Turbo (2006)
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 (0.99-1.37 inch)) at the engine front cover upper blind plug, secure the tensioner arm at
the position where the tension is released.
20. Fix the exhaust camshaft using a wrench on the cast hexagon, and loosen the camshaft sprocket installation bolt.
21. Remove the installation bolt and remove the exhaust camshaft sprocket.
22. Loosen the camshaft cap bolts in two or three passes in the order shown in the figure and remove the camshaft cap.
Note:
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The camshaft caps are to be kept ordered for correct reassembly in their original positions. Do not mix the caps.
23. Remove the camshafts for the intake and exhaust sides.
24. Remove the tappet.
25. 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 - 0.0110 inch)
EX: 0.27 - 0.33 mm (0.0107 - 0.0129 inch)
26. Install the camshaft with No.1 cylinder cam aligned at TDC of the compression stroke.
