Another disturbing noise from Ruby

[Denis Sweeney]

David, I cannot say that the parts were up to your exacting standard but the block had been decoked and fully cleaned, including degreasing and mechanical wire brushing and a full wire wool to all surfaces. This was all before being sent the machine shop. The studs had not been removed but were fully wire brushed on return the threads were clean. The valves were all cleaned and vacuum tested in the machine shop.
The head was a machined surface, completely bright and shiny when put back together.
Like I said the pics were taken just minutes after the head was removed.