I found a couple of these in the bottom of a parts box. I think they're the tensioners for the early 3.0 24v used in the 164, but I'm not 100% sure.
Anyone know for sure if these are 164 tensioners? And if so, how do I test if they still work OK? Both seem to spin freely but I can't work out any other way to test them.
Never mind, found out for myself, they are the mythical QV tensioner and appear to be working fine.
Since they appear to be extremely expensive / hard to find (I'd be more than happy to be told otherwise) maybe this is a bargain price? Roughly 1/2 the price of the last one I found sold anywhere...