Hi all,

Does anyone know what the inside of a bailey breather tank looks like? The one on my FRST is making a rattling noise as if something has broken inside, is this normal? Could this cause crank case pressure to increase as there seems to be oil forcing its way out from top of the dipstick after the car has been driven on boost, and in turn can crank case pressure affect oil pressure? My oil pressure on idle used to be a solid 20psi on idle i'm now getting 14-12psi. I've done a cylinder compression check and they are reading 130psi, 130psi, 125psi and 130psi, i'm assuming these numbers are ok, which could lead me to believe the piston rings are ok.

any thoughts on why lower oil pressure and build up of crank case pressure? is this related to the rattling breather tank?