Boost/BOV Leak?

[dnl777]

Hi Guys,

This may be a stupid question but just keen to know what I am up against. Recently I have noticed that as my car comes on boost there is quite a loud wooshing noise as if a lot of air is escaping and also my BOV noise has been a lot quieter than what it used to be on release.

My question is am I right in assuming it is my BOV leaking or could it be something more serious?

[Kickit]

what bov is it?

[31-EVO]

I/C hose leak ?
VAC hoses split
Fucked BOV diagphram

Possibilities are endless, always start at the stupid/easy end of the scale

[skinkis]

Pressure test the system, that will tell you if you have any leaks and where they are.

[dnl777]

Going to pressure test the system on the weekend.Thanks for your replies.

Oh and it's a HKS SSV BOV looks like this,

http://img451.imageshack.us/img451/6138/picture0126tp.jpg

[31-EVO]

Throw it.....really really really really hard at a wall

[Niva]

if you have a boost leak from the BOV or what ever, it would register on the guage right?

[skinkis]

if you have a boost leak from the BOV or what ever, it would register on the guage right?

Not necessarily, my old car had a hole in one of the pipes, it had rubbed on the subframe.
The car was still pushing 440rwhp at 15 psi of boost. The car had also been up on a dyno countless times and been tuned etc by a reputable tuner here in Perth, however, he missed the little detail that there was a hole in the pipe... Poor turbo must have been huffin and puffin hard to be able to produce pressure in the manifold...

http://www1.garaget.org/gallery/images/4/3106/3106-797db46178f69c9d37e51c40c94692dd.jpg

[dnl777]

Fuck, that's quite a big hole to not be recognised...
Does anyone know where I can buy one of the pressure testers?

[R3N]

SSQVs you can adjust them, have a search around and make sure it's not too tight

[Reverb]

Fuck, that's quite a big hole to not be recognised...
Does anyone know where I can buy one of the pressure testers?
http://www.turboboostleaktesters.com/

[skinkis]

If you have a welder or know someone that does, you can easily make your own.
A 3" bit of pipe (or whatever size that fits your turbo), weld a lid on it, drill a hole in the lid and smash through a valve for car tires.

Done.

[Kickit]

i got a ssqv thats done the same thing. actually like not hearing the pingpingpingping of a thing haha. time to bin it i say!

[Madhav]

Fuck yes, awesome thread. Been wondering how to do this for ages. Thanks for the info.

[dnl777]

Thanks everyone for your suggestions, had a look at this on the weekend and found the problem. Turned out one of the silicone hose joints right next to my I/C had split, I replaced that and tightened up a couple of other hose clamps and now it runs like a dream.

Much appreciated.

[Lump]

Just in case you didnt know, another way to test for leaks is just to spray all connectioness with carby cleaner at idle and listen for any change.
can be a bit easier than pressure testing