Testing stock BPV for leaks

[Angry7M]

I think my stock bypass valve is leaking, since before I get to 10 psi I can hear it hissing.

So how do I test my stock bypass valve to see if its leaking??? Which way do I blow through???

 

[CTsupra]

Which way do I blow through???

It doesn't matter. If you can blow through it, time for a new one.

 

[Angry7M]

well I can blow thgrough the inlet side (but its not excessive), but If I cover little tube, where the smaller hose connects to...air wont go through. If I blow though the side that connects to the accordion hose, I cant blow any air though there. So???

 

[CTsupra]

Sorry, I wasn't that clear. Don't worry about the vaccum line. If you are nearly passing out trying to blow through one side of the valve, it's still working even if some air is getting through. If you can blow through both sides, it's fubar. I'd just get the 110 bosch bpv, then check for boost leaks.

 

[Angry7M]

Sorry, I wasn't that clear. Don't worry about the vaccum line. If you are nearly passing out trying to blow through one side of the valve, it's still working even if some air is getting through. If you can blow through both sides, it's fubar. I'd just get the 110 bosch bpv, then check for boost leaks.

Well I can blow through the inlet side only, but its not like im passing out LOL, and its only a little. And I can feel the air leaking out the vaccum line.

 

[Angry7M]

Finally, now K know why I hear so much air at almost full boost. I have a huge hole on one of my intercooler piping coupler (im not sure if thats what its called.) No wonder I cant feel any power. So yeah LOL. :biglaugh:

major boost leak FTL:3d_frown: