@ 7 Wonders, yes I did as you suggested and did help. Thanks. @ ChrisC, I have been looking through the manual and blogs, and I think we both may have connected the oil pipes incorrectly. As the outbound oil pipe from the sump should go to the off-side of the oil cooler and the near-side connects goes to the dry sump tank. See the diagram below, can you confirm which way you have done this and if this was picked up in your PBC?