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Boost leak detector - PICS!

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Old 03-14-2011, 12:05 PM
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Boost leak detector - PICS!

This is sooooo cheap and simple I cannot believe I've not done it until now...

3" PVC cap tapped for a schrader valve:


You could get all fancy and tap a pressure gauge in there too - but its totally not necessary. The CCV, VC's, etc are gonna leak some and bleed the pressure down, so we just blow up the intake tubing until it looks uncomfortably inflated and start sprayin' soapy water and listening...

Remove airbox (or in my case 6637) and clamp PVC in place, then blow compressed air in and spray all boots, etc with soapy water:


I'm willing to bet more people have leaks than think they do... Most of that 'dirty engine' syndrome can be mitigated by eliminating leaks found with this EASY test.

Thanks to Jim (rat49F6) for loaning me this tool and all the other help he's been to me since I've been in NJ!!!
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Old 03-14-2011, 01:02 PM
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Great tip!
Reps given!
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  #3  
Old 03-14-2011, 05:19 PM
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Dumb question, but where'd you get the Schrader valve?

Mark
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Old 03-14-2011, 05:25 PM
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Quote:
Originally Posted by SkySkiJason View Post
This is sooooo cheap and simple I cannot believe I've not done it until now...

3" PVC cap tapped for a schrader valve:


You could get all fancy and tap a pressure gauge in there too - but its totally not necessary. The CCV, VC's, etc are gonna leak some and bleed the pressure down, so we just blow up the intake tubing until it looks uncomfortably inflated and start sprayin' soapy water and listening...

Remove airbox (or in my case 6637) and clamp PVC in place, then blow compressed air in and spray all boots, etc with soapy water:


I'm willing to bet more people have leaks than think they do... Most of that 'dirty engine' syndrome can be mitigated by eliminating leaks found with this EASY test.

Thanks to Jim (rat49F6) for loaning me this tool and all the other help he's been to me since I've been in NJ!!!

Keep your psi low or you will have 'leaks' everywhere
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Old 03-14-2011, 05:34 PM
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Good advice Les. Not sure how many psi I was putting in there, but guessing not more than 20-25... We just puffed up the intake tube a little and looked for leaks until it got soft again - then added more air (2-3 secs).

I'm surprised we haven't gotten any comments about the lovely hand model we used for this shoot!
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Old 03-14-2011, 05:42 PM
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Quote:
Originally Posted by SkySkiJason View Post
Good advice Les. Not sure how many psi I was putting in there, but guessing not more than 20-25... We just puffed up the intake tube a little and looked for leaks until it got soft again - then added more air (2-3 secs).

I'm surprised we haven't gotten any comments about the lovely hand model we used for this shoot!
I have a regulator on my air compressor, so I would suggest cranking it down to 20psi. Boys will be boys with the mindset of 'a little will help a little... so... lets go for a lot and.... really muke it up'

I need to make me one of those... I have the stuff laying around.
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Old 03-14-2011, 05:48 PM
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here is mine i made about 5 years ago...



here is a nice one for 30 bucks
Intake Pressure Tester
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Old 03-14-2011, 07:47 PM
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Went ahead and made one of these today (thanks for the easy directions) and I'm afraid to ask about the results - why would air be coming out of the dipstick? I only pressured it up to about 20 psi and couldn't find any other "leaks."
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Old 03-14-2011, 11:40 PM
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cool...another tool to make.
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Old 03-14-2011, 11:48 PM
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Turns out I made the mistake of hooking it up to the CCV coupler just like this. I'll try again later with the detector hooked up to the correct boot.
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Old 03-15-2011, 12:54 AM
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Quote:
Originally Posted by ScaldedDog View Post
Dumb question, but where'd you get the Schrader valve?

Mark
schrader valve came from my B.A. local Hardware store


Quote:
Originally Posted by SkySkiJason View Post
Good advice Les. Not sure how many psi I was putting in there, but guessing not more than 20-25... We just puffed up the intake tube a little and looked for leaks until it got soft again - then added more air (2-3 secs).

I'm surprised we haven't gotten any comments about the lovely hand model we used for this shoot!
u would like those beat up hands

lets make a high class new tester like rons
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Old 03-17-2011, 08:04 AM
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Thanks for the cool idea Jason, I think I'll fab one up while my chip is out for updates......It's too booring and slow to drive anyhow.

I tried to rep you brother, but.....
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Old 03-17-2011, 09:00 AM
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Old 03-17-2011, 09:16 AM
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Quote:
Originally Posted by 76'SuperCab View Post
Went ahead and made one of these today (thanks for the easy directions) and I'm afraid to ask about the results - why would air be coming out of the dipstick? I only pressured it up to about 20 psi and couldn't find any other "leaks."
I would say if you put enough pressure on it with the valves open it will bypass the piston ring's, the reason for CCV. Seems like if you wanted to check for leaks take the intercooler tube off at the cold side at the spider and plug with cap also.
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Old 03-17-2011, 11:05 AM
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Quote:
Originally Posted by jwhitetail View Post
I would say if you put enough pressure on it with the valves open it will bypass the piston ring's, the reason for CCV. Seems like if you wanted to check for leaks take the intercooler tube off at the cold side at the spider and plug with cap also.
Not necessary... We don't need it to 'hold' pressure to check for leaks - just have some pressure in there so we see bubbles in our soapy solution. Anyway, the thing you are suggesting we disconnect is the most likely suspect for a leak... Besides, at least one intake valve is always open, right?

The intake tube goes directly into CCV - unlike gassers, there is no PCV - so air blown in the way I describe is pressurizing crankcase via valve cover. This would be a good reason to keep pressure low. You could plug CCV in intake tube and put as much pressure as ya wanted (until ya broke CAC) - but again, I think its totally unnecessary!

K.I.S.S.

and not needed, but thanks anyway Joe!!!!
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