Boost test, am I doing this right?

[mtroxel]

Read a few DIY's where you just pump into the intake side of the turbo. Does the throttle plate hold the pressure on the other end? I can't hold pressure that way. Not at all. I hear some fluid moving around somewhere, but I can't hold boost. I don't think I'm even holding enough pressure so that I'd hear a leak.

[Audi_509]

I tried doing this a few weeks ago. I'm not sure if I was doing it right. But I thought the rear pvc had to be disconnected and plugged. I also read to remove the oil cap.

[Der Konig]

Fail, you need to plug the pcv return line from the turbo. You are just pressurizing the valve cover and it is escaping. See pic, I use shop rags and a wine stop.

Also, I have been told it is not good to pressure test on the inlet side of the turbo since it can strain the seals. I don't really see it doing that much damage and I do it on the inlet side, but just a thought. So you would test at the IC piping instead.

[mtroxel]

Fail, you need to plug the pcv return line from the turbo. You are just pressurizing the valve cover and it is escaping. See pic, I use shop rags and a wine stop.

Thanks. I wondered about that pipe but thought the check valve in there would hold the boost. You don't block the hose going into the throttle body?

[Der Konig]

Thanks. I wondered about that pipe but thought the check valve in there would hold the boost. You don't block the hose going into the throttle body?

No problem, and no I don't block anything else.