Doubt it would be the clutch release bearing if it was a 'churning noise'. If it was a clutch release bearing it would make more of a screaming/screeching noise, obviously everytime you released the clutch. QUOTE (Robwalker @ Feb 11 2009, 03:03 PM) So bar the head gasket going, where else could water and oil be mixing? Also for some reason my water seems to be over compressing and shooting water everywhere. This could be the pressure relief valve in the cooling system, what vehicle is it?