Hi all - come to a point now in the new year to have another go at this faint tapping noise on my 4x4 (see https://passionford.com/forum/viewto...apping+lifters for previous!)

I'm going to remove the cyl.head firstly and thoroughly go over all the checks - distortion, check for wear in tappet bores, check valve guides etc..etc..

I've been wondering recently whether the noise is being caused by very faint touching of the valves against pistons - will be fairly obvious once i've got everything off, and i can measure the head height accurately.

Anyone ever had experience of this before? Not enough to cause damage but just the faintest of contact sufficient to cause a noise as the engine slows back to idle?