Help with boost leak
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Captain
Joined: Jan 2006
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Help with boost leak
Alright I had my downpipe installed at a shop the other day, running fine, now I am only pushing about 8-9 psi!??! Why is that? Can someone help me with this, or help me find the boost leak? Haven't resetp pcm either... Thanks.
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Joined: Apr 2006
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From: Pennsylvania
RE: Help with boost leak
there is a thread about finding a boostleak in which you make a home-depot style plug for your, for lack of terms, 'pressurized areas' this way you can use an air compressor to pressurize all of your piping and such to 1. see if you have a leak and 2. to locate the leak. ill see if i can dig it up
of course if a shop did it, you can always go back and say WTF???
here is the link: http://www.vfaq.com/mods/ICtester.html
and im bored so...
of course if a shop did it, you can always go back and say WTF???
here is the link: http://www.vfaq.com/mods/ICtester.html
and im bored so...
How to build an Intercooler Pipe Pressure Leak Tester
Parts Needed:
-A 4 inch long piece of 2.5" O.D. (outside diameter) hose. (I used some radiator hose I got at NAPA)
-1.5" I.D. (inside diameter) PVC end cap.
-2 band clamps that will fit around the 2.5" pipe above.
-A valve stem (I used the rubber type you press in)
Note that if you have a larger turbo, the sizes of the end cap and hose may need to be larger in order to fit the turbo inlet.
To assemble, just put everything together as shown.
To get the valve stem in, I had to drill a hole in the PVC cap.
To use it, just remove the intake pipe from your turbocharger inlet, and attach this in its' place.
Now you need to hook something up to the valve stem to pressurize the intake so you can listen for leaks. I use a 7 gallon air tank I got from Walmart, I just fill it up with air at the local gas station. You can also use a simple bike pump.
If you have a manual boost controller hooked up, you might want to plug off its' intake hose, as they leak a lot of air, making it hard to pinpoint the real leak.
Pressurize the system, and listen all over for leaks. Make sure you or a friend listens under the bumper too, wherever there is IC piping.
A leak will be obvious, they make a loud hissing sound.
You might want to have a friend check out your boost gauge while you are pressurizing things, to make sure you don't put too much pressure on things. (20 psi should be safe, or whatever you run safely for boost)
Places I have heard of leaks occuring:
-BOV flange
-Intake manifold ports
-Throttle Body gaskets
-Holes in the intercooler
-Holes in the intercooler piping (sometimes the rubber pipe inside the stock woven mesh pipes cracks, and you can't see it from the outside... the pressure tester will find it though!! )
Pictures and Text by Brent Cook
Idea for tester from Josh Wingell
Contact bacook@mediaone.net for questions.
Parts Needed:
-A 4 inch long piece of 2.5" O.D. (outside diameter) hose. (I used some radiator hose I got at NAPA)
-1.5" I.D. (inside diameter) PVC end cap.
-2 band clamps that will fit around the 2.5" pipe above.
-A valve stem (I used the rubber type you press in)
Note that if you have a larger turbo, the sizes of the end cap and hose may need to be larger in order to fit the turbo inlet.
To assemble, just put everything together as shown.
To get the valve stem in, I had to drill a hole in the PVC cap.
To use it, just remove the intake pipe from your turbocharger inlet, and attach this in its' place.
Now you need to hook something up to the valve stem to pressurize the intake so you can listen for leaks. I use a 7 gallon air tank I got from Walmart, I just fill it up with air at the local gas station. You can also use a simple bike pump.
If you have a manual boost controller hooked up, you might want to plug off its' intake hose, as they leak a lot of air, making it hard to pinpoint the real leak.
Pressurize the system, and listen all over for leaks. Make sure you or a friend listens under the bumper too, wherever there is IC piping.
A leak will be obvious, they make a loud hissing sound.
You might want to have a friend check out your boost gauge while you are pressurizing things, to make sure you don't put too much pressure on things. (20 psi should be safe, or whatever you run safely for boost)
Places I have heard of leaks occuring:
-BOV flange
-Intake manifold ports
-Throttle Body gaskets
-Holes in the intercooler
-Holes in the intercooler piping (sometimes the rubber pipe inside the stock woven mesh pipes cracks, and you can't see it from the outside... the pressure tester will find it though!! )
Pictures and Text by Brent Cook
Idea for tester from Josh Wingell
Contact bacook@mediaone.net for questions.
Professional
Joined: Mar 2006
Posts: 169
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RE: Help with boost leak
LoL i made that exact boost leak tester, it was simple to make and seemed to work if i didnt have massive leaks on my intercooler hot side and cold side pipes!!!
