QUOTE(nditiz1 @ Jun 30 2020, 08:45 AM)
So doing a valve adjustment i found #3 intake to be very loose. I started to adjust and then found this. Why/how did this happen?
Also, why are my leakdown tests consistently 20% leaking through the case? Rings? I did it cold and the engine looks to be rebuilt from how clean the inside of the heads were.
The adjusters do wear,once the hardening has broken away you get your problem,this is often compounded by too much clearance.
I never refit adjustment screws that are too worn,its just not worth it,you will need to check the end (tip) of the inlet valve isn't damaged which I fear might be the case.
Try a compression test with the engine up to temp ,a cold air cooled engine takes up a fair amount with expansion,if your leakdown test is even 20% it will improve when hot so you should be fine.
Good luck.