13 Apr 12 16:35, Mark Hofmann wrote to Roy Witt:

 RW>> For solid lifter engines, especially that 30/30 Duntov cam, required
 RW>> valve
 RW>> adjustments about once a week; or after a hard run on race day.

 MH> Is there an adjustment that can be made to stop the "cold engine
 MH> value tap" or whatever it is called?

No. One could make an attempt to fix that by removing said lifter, take it
apart and clean it, maybe replace the spring. As long as there is engine
valve spring pressure on that weak lifter, it will leak down and need to
be pumped up by engine oil pressure before the valve tap goes away.

 MH> It really isn't worth taking off the re-sealed value covers at this
 MH> point. I think I'm going to try the 0W-20 synthetic on my next oil
 MH> change.

You might want to re-think that. By going heavier with your oil, rather
than lighter. The heavier the oil, the less likely the lifter will leak
down. Give 10w-40 oil a try.

                R\%/itt


  ... Only those who will risk going too far can possibly
  ... find out how far one can go ~ TS Eliot


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