If I bought a 1984 V8 110 a year ago and a tappet or two was a little
> noisy, and if the general advice I received was that I should remove the
> rocker covers, take off the oil feed pipes (whatever they are) and clean
> them out so the tappets quietened down, and that if I didn't do this
> quickly the cam would be damaged, and if I ignored that advice until
> today, would it be too late to do the pipe cleaning thing, or are the
> cam lobes knackered now anyway, so it wouldn't get quieter, so I needn't > bother?
> SNIP
>
I found this regime effective. Change the oil every 3000 miles Use a decent 20-50 (not supermarket, I used Duckhams for the older engine) Use a flushing additive whilst warming the engine prior to draining the oil. In my case , I think the flushing removed any build up of clag. Regards