Boost Leak detector for 2000ca250
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Joined: Jan 2011
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From: Puget Sound
Boost Leak detector for 2000ca250
You need a 3" schedule 40 PVC cap. Some install a Schrader valve, but I don't have a way to hold my air hose to it while I check for leaks. I used an air hose fitting, since I can regulate my air down to 15 PSI. My air hose fitting has a 1/4" pipe thread on the other end and the trickiest part was to find a tap for 1/4" National Pipe Thread (NPT). Maybe you can find something that can be installed with a nut and washer to make an air seal. Not that it's important that it not leak, but it's important everything is quiet so you can hear the real leaks.
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Joined: Jan 2011
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From: Puget Sound
Agreed, that's what I used - it made the process so simple: Adjust the pressure, hook up, spray. I could hear the leak when the compressor wasn't running and this helped to make short work of the whole process. I'll take a photo of the device and post it when I remember where the heck I put it. I'm going to dive into the valley (to fix boost leaks) after I let Chris (visiting from Texas) drop his foot in it once. I'm sure the PMS fever will spike after that.
Fleet Mechanic
Joined: Feb 2007
Posts: 1,852
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Just a general question about boost leak detection... I've always wondered what's going on at the engine end when you pressurize the intake. Isn't there always a little leakage through the intake valves and into the cylinders? Is it constantly leaking down a little bit?
I've never done it, just wondering what to expect if I did.
I've never done it, just wondering what to expect if I did.
Postmaster
Joined: Jul 2006
Posts: 4,993
Likes: 2
From: Bend, OR
Yes. If there is a valve in the open pos then you will hear leakage. No matter what there will be some past the rings, and such.
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Joined: Jan 2011
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From: Puget Sound
I'm a total dummy in this arena, so I have to rely on all the threads I've read that suggest I keep the pressure down to about 15 PSI. I found my leak with almost no pressure on the supply gauge.
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Joined: Apr 2012
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From: North Georgia
To find all my leaks... i had to get creative with my pvc cap. It would only stay in until about 15psi no matter how tight i cranked down on the clamp... so i had to cut grooves in it like threads to get some more grab...
With the cap no longer a shotgun blast to the face waiting to happen again... i cranked her up to 30psi and the pressure turned the motor over a bit...
Everything was holding beautifully at 30psi. Would not have found the leak in my intercooler if i had not gone that high... couple pinholes top drivers side on the inside i need to zip up.
The quick connect feature i also adopted maked the process much less like a dark ritual... what with all the cursing and all. And the inline pressure regulator is a beautiful thing hooked in right at the cap.
With the cap no longer a shotgun blast to the face waiting to happen again... i cranked her up to 30psi and the pressure turned the motor over a bit...
Everything was holding beautifully at 30psi. Would not have found the leak in my intercooler if i had not gone that high... couple pinholes top drivers side on the inside i need to zip up.
The quick connect feature i also adopted maked the process much less like a dark ritual... what with all the cursing and all. And the inline pressure regulator is a beautiful thing hooked in right at the cap.
Elder User
Joined: Dec 2002
Posts: 797
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From: UT
For the dum dums like myself wondering where this gets plugged into the system at:
https://www.ford-trucks.com/forums/1...l#post10091987
https://www.ford-trucks.com/forums/1...l#post10091987
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