1984 380sl valve lash noise on start up

[Bigmike500se]

Hi,

I have a 1984 380sl, that makes a ticking noise on start up but goes away after minutes. I've replaced all the lifters, rockers, cams, oilers and cam towers. Since then the clicking started. I have tried switching weight oils went from regular to synthetic and back to normal and the clicking continued.

I would like to know if this is normal for this type of ticking to go on with not just cold start but also start ups after 3 1/2 hours and the engine is still warm?

Please help any advise would help including suggestions.

Thanks