Correct way to Boost Leak test my ALH TDI?

[2002_auto_tdi]

I have searched around and have noticed that there seem to be numerous ways to do it that contradict each other.

As a matter of fact, I see posts where people complain that there are too many contradictions!

I am using the below method with my homemade boost leak tester that I used to use on my 4g63t.

It is very reliable and works perfect but due to sizing I can only fit it on the airbox end of the accordion.

Is this still a suitable test? I am reading that this is not the right way because the airbox isn't pressurized and yet the below is still sold with clear instructions which makes me think that is a reasonable method.

What is the deal here?

Thanks.

VW 1.9L TDI Diesel

Boost Leak Tester for your Turbo's Compressor Inlet Pipe

turboboostleaktesters.com

 

[Nero Morg]

You need to test from turbo outlet, to EGR valve inlet. I ended up making my own adapter from pvc piping from home depot. Put a cap on the turbo end, then have the gauge at the elbow that goes to the intake. Should hold 25psi no issues.

 

[2002_auto_tdi]

...and that is the way it was done on the 4g63....I have a similar home depot setup. Appreciated.

 

[Nuje]

You need to test from turbo outlet, to EGR valve inlet. I ended up making my own adapter from pvc piping from home depot. Put a cap on the turbo end, then have the gauge at the elbow that goes to the intake. Should hold 25psi no issues.

So, just to elaborate (and clarify for me): You pull the outlet pipe off the turbo, cap/seal that end of the piping, then rig up something similar at the EGR end of the piping? What do you use to pressurize and measure the air pressure?

 

[2002_auto_tdi]

So, just to elaborate (and clarify for me): You pull the outlet pipe off the turbo, cap/seal that end of the piping, then rig up something similar at the EGR end of the piping? What do you use to pressurize and measure the air pressure?

Well I can speak to how I more or less built one for my 4g63t. If the diameter of the turbo Inlet is different I think I would rather try to work through that with an adapter than build another one...

Boost leak test how to with boostpro.net tester

My reasons for doing this write-up are two fold. My first reason is to review the www.boostpro.net boost leak tester and then explain how to use it.Boost Pro: boost leak tester w/gauge review:When ordering the tester you are giving an option for models with a guage or without...

www.dsmtuners.com

Post 3.

I did add a boost gauge, I just watched the one in the car. My compressor has a boost gauge so I started a few psi below my boost target and carefully increased pressure from there. At the end of the white cap, I used a quick disconnect fitting from harbor freight for quick disconnect to the compressor.

 

[mittzlepick]

Look for the oil leakage. Reolace seal at that point, if oil returns replace that pipe.

 

[Nero Morg]

This is my setup I use.

 

[wonneber]

With the car running I sprayed soapy water on the pipes from the ASV and worked back to the turbo.
I did find a crack where one of the tubes rubbed against a pulley.