Hi guys and yes I went for a few runs in the C8 and on the last one it blew the coolant out which was a major disappointment, I do believe it is the spring as mine isn't bound with energy and the filler funnel was pitted but I honed that but it is wearing a bit thin. Any idea of NOS for those two? My temp gauge was on normal middle setting so it wasn't over-temping in fact it only took about ten minutes for it to be ok to refill prior to going home,
Regards
Paul