BOV leaking during boost leak test

[4gfun]

Alrighty,

Well I found a large boost leak. I just want to make sure that I know what I am doing before I blame the BOV.

The large hose coming off the BOV leaks badly when I perform the boost leak test. It is not connected to anything since I removed the intake tubing to allow access to the turbo inlet.

If I plug the hose with something, I can get up to 10 psi (my target is 22).

If I don't plug the hose, I can only get 5 psi.

I crushed the BOV recently and did so using a vacuum pump for accuracy.

I don't think the BOV should be leaking at all. I think that the answer is obvious, but I have been surprised before!

Thanks!

 

[jay4725]

I'm going to agree with your original conclusion.

 

[4gfun]

I'm going to agree with your original conclusion.

Bad BOV?

 

[GRAVEDIGGER]

You're right. You should not be leaking any air out of there while doing a blt. If you are, your bov needs replaced.

 

[jay4725]

From what you said, if you were to plug up that hose or hook it back up you should get the amount of psi you were getting when you were testing the crushed BOV, unless you have another leak in the system.

 

[4gfun]

From what you said, if you were to plug up that hose or hook it back up you should get the amount of psi you were getting when you were testing the crushed BOV, unless you have another leak in the system.

Meaning it should stay closed until a higher psi? I do have another leak in the system at the TB but want to get this out of the way.

So are you saying the BOV is bad like gravedigger?

Thanks

 

[Tigerhorns]

You sure its not a bad BOV check, and see it it's blowing air out when your ideling

 

[GRAVEDIGGER]

If it's leaking it's bad.

 

[13b Bro]

Make sure you open the thottle plate to pressurize the IM so you also have pressure on the top side of the BOV diaphragm.

 

[4gfun]

Which is it ? I can't test it at this point...The throttle body has a Boost Leak!

 

[nek]

For blt. Hook your bov up to your turbo nipple. That would simulate the same pressure that the IM would for your bov diaphragm.