boost leak test

[peter535]

when doing a boost leak test how long do u have to pressurise the turbo im using a 150psi compresor and im not getting anything on my boost gauge

 

[snowborder714]

What kind of boost gauge do you have? Where is the vacuum line tapped into? What kind of line are you using for the vacuum line (small nylon one that comes with most gauges)?

 

[oldman]

1. Post a picture of your air compressor.

2. Move the tester to the TB elbow.

3. Use proper grammar, spelling, punctuation and capitalization in tech posts.

 

[peter535]

How can i post pictures?

 

[peter535]

What kind of boost gauge do you have? Where is the vacuum line tapped into? What kind of line are you using for the vacuum line (small nylon one that comes with most gauges)?

its a glow shift gauge,the line i beleave is cilicone

 

[peter535]

I just put the tester on the tb and now i can see on my boost gauge when i pressurise it my question is do i have to have my air intake back on and the pipe that was on tb do i have to block it off?

 

[snowborder714]

I just put the tester on the tb and now i can see on my boost gauge when i pressurise it my question is do i have to have my air intake back on and the pipe that was on tb do i have to block it off?

I'm not quite sure what you're asking here. When you do a boost leak test from the tb elbow, you don't have to have your intake pipe on the turbo (if that's what you're asking). If not, please describe your question with better grammar and punctuation.

 

[peter535]

I'm not quite sure what you're asking here. When you do a boost leak test from the tb elbow, you don't have to have your intake pipe on the turbo (if that's what you're asking). If not, please describe your question with better grammar and punctuation.

The uicp that goes to the tb i have to disconect it in order to put the tester on the tb, do i have to block it off the uicp?

 

[oldman]

The uicp that goes to the tb i have to disconect it in order to put the tester on the tb, do i have to block it off the uicp?

No, you're pressurizing towards the engine, not towards the turbo. Once you're done fixing leaks after the TB, reconnect the UICP and retest from the turbo.

 

[peter535]

When i pressurize from the tb im testing from the tb to what?

 

[turbosax2]

You take the uicp pipe off, but leave the tb elbow attached. Place the boost leak tester on the throttle body elbow (just like you would attach it to the turbo) and pressurize the system. The reason you do this is to eliminate all of the piping from the turbo to the throttle body so you only have to focus from the throttle body on. This helps you find leaks easier since you have a smaller area to pay attention to. Once you're satisfied you have fixed all the leaks you can, put the uicp back on and test again from the turbo.

 

[oldman]

When i pressurize from the tb im testing from the tb to what?

To the intake valves and one combustion chamber because one set of intake valves will be open. Study post #2 in this article.

 

[Spoolin98]

To the intake valves and one combustion chamber because one set of intake valves will be open. Study post #2 in this article.

Bruce
This maybe a really dumb question, but how do you turn the motor to 30* ATDC to avoid valve overlap.

 

[turbosax2]

Bruce
This maybe a really dumb question, but how do you turn the motor to 30* ATDC to avoid valve overlap.

http://www.dsmtuners.com/forums/turbo-system-tech/277248-easiest-way-find-30-atdc.html

 

[Spoolin98]

http://www.dsmtuners.com/forums/turbo-system-tech/277248-easiest-way-find-30-atdc.html

Thanks Eric