So Ive got the heads off today.
Just looks like the valves have just failed. There is no sign of PTV contact on any of the other three pistons.
Both valves have failed in exactly the same place just before it widens out to the head.
There's no sign of Det or anything heat related.
So pissed off about this one as I have gone to great lengths to make sure it didn't happen again.
proper valves double springs, hardened steel retainers, a conservative 7800rpm rev limit and 1.1mm gaskets.
Really really pissed off this time.
