Quote:
Originally Posted by rac3r
So assume I have to loosen (but not remove) those on each cylinder and then re-tension? I've not seen/heard that before
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Yes, that's right. As you can see from the diagram, the pulley assembly has three parts; the back plate, which is keyed to the camshaft; the toothed, slotted, pulley, which is free to float relative to the back plate once the screws are loosened; and the top washer, which clamps the pulley assembly together.
With the locking pins inserted into the back plate, the cam cannot move, whatever you do to the toothed pulley, so your valve timing is safe. (Don't loosen the pulley wheel without first locking the back plate.)
The securing screws are 10Nm as you said.