xt2005bonbon Posted December 14, 2015 Share Posted December 14, 2015 Some of you may know that one can perform a quick vacuum/boost leak test by doing the following: 1. take off the "S shaped" hose between the air box and the turbo inlet hose 2. plug off the turbo inlet hose with a spray paint can cap 3. disconnect the bpv hose from the blow-off valve 4. blow (with your lungs) through the bpv hose 5. don't let air escap through that hose and listen for leaks Two questions about this method: 1. Is it as effective as doing a true boost leak test? 2. assuming one does not have a leak, what should be the rate of air pressure loss while I avoid air escaping from the bpv hose with my thumb? For instance, I blow through the hose and close it with my thumb. If I take off my thumb after 5 sec, air will rush back. After 10 sec, not so much. After 15 sec, almost nothing back. Is that to be expected? Link to comment Share on other sites More sharing options...
gimpydingo Posted December 15, 2015 Share Posted December 15, 2015 Sub'd for question 2. I did just make a smoke tester, need to test it this weekend, knock and a/f out of whack after heads replacement. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted December 15, 2015 Author Share Posted December 15, 2015 fwiw, this website mentions that "if you lose 1 psi per second (1psi/s), then your system is in good shape." But that is when you perform a boost leak test. Not sure if this applies to the 'quick and dirty' leak test via the bpv hose. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted December 18, 2015 Author Share Posted December 18, 2015 bump! Link to comment Share on other sites More sharing options...
JmP6889928 Posted December 18, 2015 Share Posted December 18, 2015 Dude...you blow your car? Wow..... Link to comment Share on other sites More sharing options...
xt2005bonbon Posted December 18, 2015 Author Share Posted December 18, 2015 http://forums.nasioc.com/forums/images/smilies/blankface.gif Link to comment Share on other sites More sharing options...
gimpydingo Posted December 19, 2015 Share Posted December 19, 2015 dude...you blow your car? Wow..... oh no!!!! Link to comment Share on other sites More sharing options...
xt2005bonbon Posted December 22, 2015 Author Share Posted December 22, 2015 So, does anyone know? Surprised no one replied yet.. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted December 28, 2015 Author Share Posted December 28, 2015 One last bump until I give up . Link to comment Share on other sites More sharing options...
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