The Ford Capri Laser Page

I did the valve clearances today and all rockers had no gap,except cylinder 4 exhaust. Still a bit tappety,I think,unless it's just my head

Worryingly, if they`ve closed up like that, could it be valve seat recession? All you can do is keep an eye on it I suppose, surprising `cos a lot of people drive around, additive free, with no problems at all.