Re: Chasing the knock.
Your latest picture doesn't show gear backlash. It appears to me to show crankshaft endplay. 2 different animals.
Gear back lash is checked by inserting feeler gauges between the crank gear and cam gear teeth. As mentioned before it should be in the .004-.007" range. If a .010" strip will slide thru, you still have too much lash.
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