DIY Boost Leak test made easy

This is a simple way to perform a boost leak test. Using items that can be found in just about any hardware store.

2.5'' I.D PVC $6.00
Universal bicycle valve $11.00
Air tank w/gauge $25.00

The rest is just a bottle of soapy water to test for leaks. I have heard of people doing more advanced ways of doing this test by using a smoke machine. But this method has worked for me time n time again, just takes a bit longer.

[christopherwilliams]

Thanks. Blow off pretty close to ground.

[brandonprettyman]

why is your bov so low to ground you should flip that around before you break it off on speed bump

[Grainsauce]

Bike pump or cheap electric walmart pump will work also

[kpdvw]

which idiot designed the blow off on the bottom of the pipe down close to the road surface?

[jesseharriott]

Shoulda sprayed the corner of that intercooler. 💨

[EpicCreeperCorps]

incredibly useful video and interesting ideas. Thanks!

[trmjrzyslime]

danm whats up with that bov how many you been through?

[MojoSoRico]

Do you have to block off the passage way to the throttle body so the air doesn’t escape into the engine ?

[BigVanSmallWorld]

using an air tank is brilliant thank you

[gilessx]

That open fitting on cam cover will be letting in air that is not metered I hope you dont run it like that

[jucwashere]

Good but when you push air there cylinders will allow some air to pass right? They are not 100% sealed.

[MrZimmaframe]

Great video, you are offering free advice to solve an issue. Ignore the negative comments.

[Frzenfrst]

My turbo is kind of a pain to get to. Can I attach the tester to the turbo inlet pipe instead?

[williamgilman]

Cool, I'm in Florida going to be doing this on my 2010 speed 3. thanks for doing the video.

[vazfx]

Thanks. That's is a great solution.

[YuriDomnikov]

Is it possible to just spray soap while the engine is running provided that a helper is revving up the engine ? I know about the noise noise does not help but the bubbles should tell anyway

[g-track]

what if it comes out from the turbo the leak? what do that mean?

[TheTruelakersfan]

Try doing that on a twin turbo car like an n54 engine would be impossible.your lucky that old car is much simpler and has the turbo sticking all the way out like that.

[danmackintosh]

Nice tip, thanks. might have to try this. Just a question though. With 6 cylinders how do you deal with the fact that some valves may be on overlap at the time of the test, just rotate the crank until you find a "sweet spot" or block the exhaust too?

[davejohnson]

Nice video, thanks. Gonna try this. Hope to find something as it's down on power.