Thanks so much for your post regarding the PCV. I have spent 2 months trying to track down the source for the loud whistling noise coming for my Freelander LR2 2010 model. My local Landrover mechanic was unable to identify the source, ended up changing my water pump to no avail and sent me to have the transmission checked! The Landrover mechanics in Cape Town are not aware that a PCV valve can cause this problem. Changed the valve cover and hey presto, problem solved. Thanks again, I am truly grateful for your post.