>What's going on when the valve clearances get bigger?
>What if it happens over a relatively short period of time vs a long period of
>time? Does that mean anything?
At best it would be due to the adjuster screw loosening up, or inaccurate
setting to begin with.
If only found on a couple of valves, then it might be due to cam or tappet
wear. This wear usually accelerates quickly if it is happening. Reset the
valves and check again in 100 miles. If the same valves are loose again. It
is probably a very "bad" thing. After tightening, use a dial gauge on the
rockers and see if the formerly loose ones are moving less. If they are less,
then you have confirmed that the cam lobes are going bad. It would be best to
fix it now.
-Tony
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