Because I am an idiot and overtightened the rocker. Or put the curved rocker gi in guide in the wrong way around my car broke down. The rocker bolt has snapped.
Fortunately it was a clean snap and was while I was stationary. (Outside the ashmoleon) anyway, what is the prognosis.
1) a new head assembly £1k 2) a delay for a repaired head assembly by sns. £500 3) someone mearby will be able to fit a new bolt. £250
I guess I am asking if these bolts can be replaced without having to changed the whole head section??,