Thanks for the info speedy.....
...but I don't fancy regrinds to be honest. Main problems seem to be either lack of adjustment range to accommodate the drop in base circle diameter (currently struggling with this problem on a Lancia TC motor I'm building), or if they use metal spraying to build up then grind back to original spec, I'd worry about it falling off. I suppose if the wear wasn't too bad and just the exhaust lobes were done, it might just work, but there are too many 'ifs' in there for my taste and more importantly, my crappy luck.
And "from £450 + VAT" for billet...now that's just plain silly
Car ain't worth more than £1500 even if it was perfect.
Shame about the 164 cams not fitting without work though. The ones in my spare pair of 164 heads are fine. Maybe I should put that 3.0 I have sat in the garage in the car then.....
...hang about, that sounds familiar
I reckon this must be a common problem with the 12V V6 you know. Exhaust lobes are much narrower than the inlet ones, they operate the valve via a rocker with a ratio greater than 1:1 so assuming a similar valve spring, the pressure on the nose of the lobe must be way higher than the inlet. They also get a bit less oil than the inlets.
I'm starting to think that the "best V6 ever made" ain't so hot. I know a lot of folk who have had crank problems, valve guides are a constant problem, the hydraulinc timing belt tensioner is less than brilliant, I think the valve gear is suspect on the 12V and lets not even discuss the ridiculous timing belt wrap-angles on the 24V - no wonder they slip teeth and do the valves....
..still, it's better than an Essex or Cologne by a decent margin.
Ho hum. 'spose I'd best just suck it up and stop whinging.
There's a really nice looking 164 3.0 parked nearby with a for sale sign in the window...maybe I should go look at it.