Boost leaks...

[Dus10R]

Well for the past week I've noticed that my car has only been boosting to .7 bar. Didn't seem normal to me so I built a gizmo that I could plug into the intake tract where the airbox would normally connect to, pressurize the track and listen and look for leaks.

So Right off I hear a hissing sound comming from the right side of the engine so I start feeling around and then start spraying soapy water around and I can't find it. So I happen to rest my hand on the oil filler cap and the sound got muffled. So I tried to tighen the oil filler cap and it was alread as tight as it would go and still leaking. So I barely started to back it off and it sealed and stopped hissing.

Then I sprayed water over all of the hoses and lines on top where the DV's are and I started to see bubbles comming from a small hose that connects to a square block. The hose is clamped on with some type of wierd clamp and it looks to be leaking from around the clamp. The hose and block are behind and above where the oil filter is and it runs front to back, not sure what it is but I have pictures that I'll post later. That one I couldn't fix, to hard to get to without removing a lot of stuff.

So then I crawled under the car and could hear more hissing comming from the rear driver side. Turned out to be the intake hose going into the turbo, so I tighted all the hose clamps and it stopped.

Took the car back out and now it's boosting consistantly at .9 bar (stock unprogrammed ecu)

So, if anyone has an X50 that's been boosting in the .7 range (Ive read posts from guys asking if that was normal) you may ought to check for boost leaks, it's not normal.

[jpflip]

Do yourself a favor and lower the engine next time you work in that area...It is so simple and give you so much space to properly work in what was a tight spot!

See this discussion....Lowering the engine

[Dus10R]

Do yourself a favor and lower the engine next time you work in that area...It is so simple and give you so much space to properly work in what was a tight spot!

See this discussion....Lowering the engine

Doing this doesn't put any weird stresses on the transmission or axles?

[jpflip]

Many people replace the diverter valves that way, me included. I was worried the first time but checked everywhere and nothing is under stress or binding....

[Dus10R]

Many people replace the diverter valves that way, me included. I was worried the first time but checked everywhere and nothing is under stress or binding....

Would def. make it easier... thanks for the tip.

[Dus10R]

From my PET schematic, it looks like the only boost leak I have left is from this part no: 996 605 165 00 Change-Over Valve.

Seems like a weird place for a boost leak, but then again so did the oil filler cap.

[jpflip]

I was able to stop the leak at the oil cap by cranking the engine just a little bit (just a touch of starter) until, I guess, all the intake valves were closed....