Any tips out there for testing for boost leaks? My plan is to put a PCV cap into the charge piping where the compressor outlet is (or before the turbo inlet), and hook it to an air compressor with a needle valve to control the flow. Then I would need to pull a rocker or two so there are no open intake valves. This should let me test for leaks in the cold piping, intercooler, BOV, MAF sensor, throttle body, intake manifold, injector o-rings, EVAP and MAP ports, and the various vacuum lines to the BOV, boost controller, brake booster, and fuel pressure regulator. I don't think I'll be pressurizing it past 15psi.

Does this sound like it will work? Any other tips?

 

Theres goin to be some leaking past the valves and such. Best thing to do is take it off the TB, cap it there and then pressure it up from the Turbo outlet.

 

Boost leak symptoms video and DIY boost leak tester

Check this out. Seems easy to build if you don't have one yet.

 

That was one of my main worries, leaking past the valves. As long as that's normal it shouldn't affect the checking of other leaks, other than it might make it hard to listen. Just got to set the air valve perfectly so it will maintain the pressure. I'm really hoping to check for leaks in the intake, especially around the fuel injectors. Apparently it's a common place for leaks.

Thanks for the link! I made one very similar to that

 

No problem! Did you get everything installed yet? I'm anxious to see pics and videos as I'm wanting to do pretty much the exact same setup as you some day.

 

Hoping to do the turbo install this weekend. But I'm wanting to get the cold pipes and intercooler in this week so I can test for leaks. Also waiting on the tune and meth/water injection parts.

 

This is the one I made for my procharger. Attaches where the filter would go. The tube and gauge is so I can watch the air pressure as I fill it with air. Could also cap the exhaust off and test the full system. But that may take awhile to fill. Lol

 

I always pressurize mine where the filter goes. Don't worry about the valves leaking. It takes about 60psi on my leak down gauge to get 20psi built up in the charge pipe. Its better if you pressurize the whole thing so can check vacuum lines and any ports you may have blocked off on the intake. Those little rubber caps dry rought and blow off my truck all the time.