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Tapping at Valve 8 After Valve Adjustment


Seaway

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1985 720

 

Needed to replace my valve cover gasket and while I had the cover off I thought I would do a valve job to try to quiet the tapping valves.  Got everything set at TDC per the instructions I found on this site and adjusted everything (on a warm engine) and got it all buttoned back up with no trouble.  Started the truck and I still have noise from Valve 8.  I know it is this valve because I took the cover off and ran the engine and I can hear it directly from that valve. 

 

Could it be that I since this was the last valve I adjusted that it had cooled enough that I needed to adjust it more tightly than the others?  Could it be a valve problem, and not an adjustment issue?  Should I just go back in and adjust it again once the engine is all the way warmed up?

 

The upside to this whole experience is that the new valve cover doesn't leak and the truck seems to be up on power.  Idle is still rock solid and it seems to be running smoothly.  I am using Rotella 15w-40 and the oil level is spot on.

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TDC set half the valves. Torn ONE revolution to TDC and set the other half.

Yes, that's what I did per your post in another thread on this site.  Everything went smoothly (though perhaps a bit slowly) and I was confident things had gone well until I started it and discovered it still taps.

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