BossHogg

I've recently installed a new set of boost tubes on all the inlets and outlets under the hood including turbo etc. I've also had the manifold gaskets and turbo gaskets replaced, and this past week I noticed that it sounds like I've got a really small boost leak somewhere. What's the best way to track down a boost leak?

The leak only appears or should I say I can only hear it only on SOME WOT runs, doesnt happen every time? Its kinda weird.

5.9Excursion

Go to your local plumbing store and buy a 4" to 4" rubber coupler, a 4" pvc fitting that slips inside it with internal threads on the other side and a 4" threaded cap. Drill the cap and thread it to accept an air hose connection. Dial down the regulator on your air compressor and pressurize your air intake (remove intake setup and place this on your turbo inlet). Keep in mind if you don't secure it tight enough, the assembly will blow of the turbo...

good luck...

BossHogg

Sounds easy enough. One question though, when I do this how will I know when the system is pressureized enough? I guess I'll start hearing where my leak is first? Do I need to tighten down the 4" inlet to the turbo first with a hose clamp or something?

5.9Excursion

Yes, tighten the rubber coupler down with clamps. Usually you can find any leaks with much less than your normal boost pressure (soapy water in a spray bottle works well too, look for bubbles).

WUnderwood

do a search, this has been posted a few times before

CrashCade

https://www.dieseltruckresource.com/...st+leak+tester

cincydiesel

Second the soapy water. Worked great for finding mine

XXLTEXAN

while you got a bucket of soapy water you can give yourself and your truck a bath...erbody wins