Any B5 S4 Specific Boost Leak Test DIY?

**CONTROL ONE** · 11-04-2008 10:03 AM

Searched the usual sites but couldn't come up with anything specific to the B5 S4, or even with a twin turbo setup?

I've boost leak tested my DSM a billion times but the setup was much more convenient, just pull off the air filter and cover the actual turbo inlet with the tester to diagnose.

I can only imagine that since we do not have access to the turbos that the only method would be through the Y-pipe opening?

Thanks.

**Blake260** · 11-04-2008 10:07 AM

yep, thru the y-pipe, and plug the hole for the pancake valve on the right.

**CONTROL ONE** · 11-04-2008 10:21 AM

Anyone know off hand what size diameter I would need to make one?

What would be a 'safe' value to pressure test to? 25 psi?

I'm currently running a GIAC X chip, so I would definitely want to test up to 20 psi.

Would this method find leaks in the DV's specifically?

**VinNyS4** · 11-04-2008 11:19 AM

20psi Is To Much Try Around 10-15psi The Most If You Have A Leak Somewhere You Will Here A Hissing Sound From Where The Leak Is Coming From

**2000 A6 2.7t 6m** · 11-04-2008 11:26 AM

Here's a write-up on how to make and use a leak tester, courtesy of AWE.
http://www.awe-tuning.com/media/pdf/...ure_tester.pdf

**CONTROL ONE** · 11-04-2008 12:35 PM

Originally Posted by 2000 A6 2.7t 6m

Here's a write-up on how to make and use a leak tester, courtesy of AWE.
http://www.awe-tuning.com/media/pdf/...ure_tester.pdf

Cheers, that's just about perfect.

**RedRocketS4** · 11-04-2008 12:36 PM

if you can't find the cap specified in the awe write-up, just get a 1" rubber chair leg nub thingy. worked for me.

**soccerplayer01** · 11-09-2008 06:08 PM

i make them all the time, they are so easy to make, costs 7 bucks to make. home depot or lowes u can go to make one instead of spending 20 bucks. 3 in rubber cuppler, pvc cap, pvc glue, 2 clamps, dont know the name but where u fill air in tires, lol.

**CONTROL ONE** · 11-18-2008 01:49 PM

Just made one myself from Home Depot today for $13.32 CDN.

**NogaroWonda00** · 11-21-2008 02:29 PM

Originally Posted by VinNyS4

20psi Is To Much Try Around 10-15psi The Most If You Have A Leak Somewhere You Will Here A Hissing Sound From Where The Leak Is Coming From

well i put 25ish thru mine, (stage 3 thou) so for you id say do a few psi higher than you peak at just in case

By the way i still have all the stock hoses, the only thing ive had to replace was the throttle body boot......Which brings me to my next point

open the butterfly ;)

**dfaudi** · 10-17-2010 08:49 PM

Check out turboboostleaktesters.com

**quattro_tts** · 11-06-2010 04:11 PM

had the same problem, step by step instructions on how to test a 1.8T for leaks. Cheap and fast way

http://www.younanplex.com/engine/car...t_audi_tt.html

cheers!

**quattro_tts** · 11-06-2010 04:12 PM

^^ if that links doesnt work...heres the direct link

http://www.younanplex.com/engine/car...t_audi_tt.html

**JackalS4** · 11-06-2010 08:30 PM

Originally Posted by dfaudi

Check out turboboostleaktesters.com

Ah yes, I got mine from them, T-bolt kit, gauge & all! A great kit!

Here are a couple of pics, i'll try and do a specific pressure test write-up with this kit since i've been meaning to...

Here's our kit (2.7T/S4):
http://www.turboboostleaktesters.com...dsh-Kit/Detail

They had great customer service too!

I'll do the write-up when I get the chance.

**Campbell_2.7T** · 11-06-2010 09:57 PM

http://www.allroadfaq.com/downloads/...re_testing.pdf

**dfaudi** · 11-07-2010 02:38 AM

Originally Posted by dfaudi

Check out turboboostleaktesters.com

Theres also a writeup on the kit with a tire valve stem.
http://www.turboboostleaktesters.com...101/Categories

**camlacen** · 10-10-2011 08:19 PM

Sorry to bring back an old thread but not finding much information. I made my little tester with a gauge and what not. The system doesn't build any pressure at all. I have the oil fill cap off and can here the oil bubbling? Does this mean that I'm low on compression?

**mholme** · 10-10-2011 08:26 PM

It's not supposed to build pressure. You run a sustained pressure through the intake to expose any leaks. The bubbling is normal.

EDIT: I just reread that you aren't getting any pressure at all. What's your air source?

**camlacen** · 10-12-2011 07:23 PM

I large compressor with a regulator set to 15 psi.

**mholme** · 10-12-2011 07:40 PM

Maybe the gauge on your tester isn't working? It sounds like pressure is going through the intake from your description.

**camlacen** · 10-12-2011 07:48 PM

I'm going to get plugs for the charge pipes and pressurize it to there and see if it holds anything; If the guage still isn't reading I will try a different one. There was quite a large hole in one of the charge pipes (maybe 1.5 inches by .5 inches) that was fixed but only brought me up maybe 2 psi.

**JackalS4** · 10-12-2011 08:28 PM

Make sure you've plugged the PCV port (see my above pic) - just in case you missed this detail.

**BADRVCA** · 07-01-2013 07:07 AM

When i do a Boost leak the Air stays in the intake system...any ideas why ??

**toolo4sno** · 07-03-2013 07:14 PM

Originally Posted by dfaudi

Check out turboboostleaktesters.com

I just bought the turbo boost leak testers device. I have used my DIY version a few times, but the PVC part frequently popped out. It hasn't been very useful, and this thing isn't that much more than the DIY parts.

I like the gauge and valve fitting to hold the pressure and then check for leaks. I haven't checked the pressure yet, but with an OTD approaching I should. Ironically, it shipped from right down the road from here.

I would hear the bubbling noise when using my DIY unit. I never felt very confident it told me anything. The bubbling is kinda loud and makes air leaking sounds hard to find. That or i don't have any. We'll see if seeing gauge movement helps.

**ETFS4** · 07-03-2013 08:12 PM

Originally Posted by CONTROL ONE

Just made one myself from Home Depot today for $13.32 CDN.

I see you're in Toronto control one, any time to run a check on my car?

**toolo4sno** · 07-05-2013 02:50 PM

I have done some pressure tests now with the turboboost... device. I seem to be getting less loss than the 1PSI/s the guide above describes (http://www.turboboostleaktesters.com...101/Categories).

I timed my air loss at about 16 psi per minute. I could not hear any air noises aside from the bubbles in my oil. I'm going to call it and say I don't have a leak.