Hey everyone, so I’ve got a 2010 NC with a GT Turbo kit from Fab9 installed professionally. Recently I had an oil catch can and new BOV installed because my BOV was leaking. The new BOV had a much stronger spring in it, an 11 PSI spring and I’m unsure what spring was in the old one. After install the car started cutting out under heavy boost and manifold pressure is much higher. I called Fab9 and asked them what can be done to fix this and they said to send data logs. Yesterday after doing some hard pulls with the new BOV I found oil on my drive way which I’ve never had before. I snapped some pics and it looks like the oil is coming from the oil drain line of the turbo. Long story short does anyone have an explanation for the oil issue I’m having now?

 

First, did you mean "wastegate actuator" rather than "BOV"? The blowoff (or bypass) valve is used to dump pressure in the intake when you lift off the throttle, whereas the wastegate is used to control the boost pressure in the intake manifold when you're on the throttle.

The first thing I would check with a leak like that is to make sure the drain hose and relevant fittings are all tight. It could well be the top ftting, small amounts of oil will tend to run down the outside of hoses before collecting enough at the bottom to make a drop to fall on the ground.

What was the car doing such that it needed a new catch can?

--Ian

 

Thanks for the reply. I did mean BOV. We did a boost leak check and the system was loosing pressure on/around the BOV. Upon further inspection it looked like an o ring had either not been used or came off. In addition to this I think Fab 9 sent me to light of a spring as the BOV was always open at idle. Oil fitting on top is clean and had been fully tightened a month ago. My mechanic told me to get a catch can because I had complained about oil residue on the surfaces of the engine and he said it was probably blow by from the PCV. Looking back now I think there’s always been a small leak at the oil drain. Just all very strange to me that just from a new BOV and catch can that I’m now getting significantly higher manifold pressure, boost cuts, and now oil coming from drain line.