Hi all,
My 1989 metro with original big valve head(refurbed if that makes a difference) taps like len goodman under load.
It sounds like a metallic tapping, but it isnt the tappets as it doesn't tap when idleing at 1000rpm.
It increases as the engine speed increases and has got louder recently.
Tappet clearences adjusted to factory settings
Any ideas what it is? I think it is without a doubt engine, but what?
It almost sounds electronic too, so could it be distributor? Or potentially alternator?