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[I6V8]

No. Wear on the tip vs none or little on the backside which is where the tappet sits when you check the clearance.

My point was, if you set the lash to 0.010 (or 0.007 at the cam), the (much)...

[I6V8]

UPDATE:

Well, the puzzle is solved. As it turns out the cam is the original, 300K+ miles on them and wasn't reground during the rebuild. The rockers were replaced on an as needed basis....

[I6V8]

So, I found pretty noticeable tappet wear tracks on both lobes on cylinder 2 and less so on 6. These might very well stem from the tighter clearance I set last week on those 2.

That said,...

[I6V8]

I don't believe so but can ask the owner before the PO. It seems to be getting noisier too and today it started tapping right away and then quieted down faster.

I'm changing to 15w-50 right...

[I6V8]

I ordered one before seeing your post lol. Was just delivered 20 minutes ago....

[I6V8]

UPDATE:

I thought the clacking was gone after doing another round of adjustments tightening clearances slightly to the tighter end of 0.008 and 0.009 but 2 cold starts later we're back to...

[I6V8]

Not sure on the rockers. I got the cover off now and snapped a pic. Oil is Mobil 1 5W-50.

Drilled the spray bar holes out to 2mm, cleaned and blew out with compressed air.

Re-checked...

[I6V8]

Alright, resurrecting this thread as I'm prepping to pull the rocker cover off again next week. I'm beginning to think I might have some premature wear on one of the cam lobes on cylinder 1.
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