Has I said in the introduction post. I made a complete restauration of my Rekord C Coupé. It has rhe 1.9s 4 cylinder engine that has been completely overhauled. The head was handed over to a shop to be rectified, rotating valves and new seals. Thing is some rockers keep breaking and I font know why. A old classic car mechanic told me that the rotator/spacer where the valve spring seats could be mounted with the wrong orientation because the springs when decompressed still look too short. Photo attached. I don't know what or where else can I look for the cause of it....