Ok- sorry to offend.

you can always run your feeler gauge through a micrometer to see how much drag is appropriate. Personally, for me, it I've got to watch checking the adjustments. The airfilter and intake prevent a straight line on the feeler gauge and gap. So, especially on the exhaust, I've got to make sure it's straigt in line.

Another observation. I've had at times noises I couldn't trace down which worried me. Many times changing the oil has cured the problems- I've tested the old oil and it tested fine. So, cannot explain it. I have not had this problem with Chevron Delo or the Mobil Delvac.
Is the idle speed correct? Any loping of the engine? A good valve adjustment and clean filters- the engine should idle very smooth.

Reminds me where are my wrenches Loo!!

Michael

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Michael McGuire
83 300d
01 vw A4 TDI
66 Chevy Corsa
68 GMC V6 w/oD
86 300E