I felt sure the noise coming from underneath the "rocker box" was tappet noise. However, I have had both boxes off, taken away the lifter system and examined it ..... everything appears to be OK! I was wondering if the noise that I hear could be anything else or whether I might be missing something here.
It is a "tap-tap-tap" noise that increases with engine speed ..... it is quite loud on idle and gets worse on speed up. Any ideas would be gratefully received Thanks in advance Tony