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Boost leak??

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DSMcrazy3

DSMcrazy3

N/T DSM Wiseman
DSM Wiseman
2,196
62
Dec 29, 2004
Humble, Texas
Alright, I am about 100% positive that I have a boost leak, and I know you all are thinking. Just do a boost leak test, which I will. I was just wondering if you guys think this could be where it is(I checked and made sure all my couplers were as tight as I could get them). I've heard if these bolts aren't all tight that it can leak.. What do you guys think?

Thanks,
Josh
 

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Throttle body seals can leak.. BOV gasket can leak.. only way to know is to test it - doesn't take too long to find the leaks, but fixing a couple of them can take awhile.

When I did my boost leak test, I took some liquid soap and lightly covered all gaskets and couplers. a boost leak will make bubbles.
 
TIghten those WG bolts up by the looks of them they are falling out. Also looks like your return is kinked is it?
 
Another thing, in 1st and 2nd gear I get either .5 or 1 PSI, but in 3rd I usually get 2. Is there any certain reason that I would get more in that gear than previous gears? If it's still a boost leak, HOW would I get more PSI in one gear than another??

Thanks,
Josh
 
Could i put alittle of the soap on the turbo, around that area and turn it on and see if it bubbles? Any prob w/ that?
Click to expand...
You'll not be able to build enough pressure free revving it, some leaks will not show until at higher pressure levels.

Alittle bit, the actuator arm gets in the way a bit, but I figured since it's not high pressured or anything it wouldn't restrict the flow too bad...
Click to expand...
If the flapper isn't closed completely, it will greatly affect your spool up time. Whatever is in the way of the actuator arm, move it.

CanadianTSi said:
Just tigthen them then you don't have to worry about them....
Click to expand...
No offense but I'm a little disappointed in your respones, considering how helpful your posts usually are and how long you've been around.

Josh, trust me on this one, the only way to find leaks is to pressurize the system, stop wasting time and get on with it. If you run into trouble along the way, we will be here to help. ;)
 
haha, as soon as I saw your name under last post. I KNEW it was going to say something like that..Knowing how you're so obsessive w/ boost leak tests hahaha just kidding, I know you explained to me why you recommend them so often, and I know it is important I just need to get my hands on a compressor! Unfortuantly for me out of all my friends, I am the only one boosting(proud yet, lonely feeling). I will test it though and let you guys know the out come. It could still be a leak though? Even though the system holds pressure more at sometimes than others?

Thanks again Bruce,
Josh
 
DSMcrazy3 said:
haha, as soon as I saw your name under last post. I KNEW it was going to say something like that..Knowing how you're so obsessive w/ boost leak tests hahaha just kidding
Click to expand...
Every turbo owner should be obsessed with boost leak test, the health of a turbo system is based heavily on a leak free intake tract. :)

It could still be a leak though? Even though the system holds pressure more at sometimes than others?
Click to expand...
Definite yes but probably not limited to, I suspect it also has something to do with your actuator situation as well. If you need to trim your fan, do it, or replace it with aftermarket slim fan. Short cuts usually end up costing more in the long run.

Thanks again Bruce
Click to expand...
Glad to help.
 
DSMcrazy3 said:
How does the actuator have anything to do with the fan? LoL
Click to expand...
I can't really tell what exactly is in the way of your actuator arm from the above picture so I assumed (never assume :coy: ) it was the cooling fan, I still have yet to see a 420a engine bay in person. :)
 
On the 2nd pic I have posted, the black, blurry bar across the bottom is the top of the radiator. If that's what you're talking about. but it is no where close to the actuator arm haha.. My friend just stated that since that bolt is loose, it could be allowing the whole assembly to move. Allowing the flapper to open/close alittle. What do you think?

Josh
 
Tighten those wastegate bracket bolts down, then check if your actuator arm still seems loose....your flapper is opening up prematurely thus not building up boost :thumb:


talk to ya in the morning :rocks:
 
DSMcrazy3 said:
Allowing the flapper to open/close alittle. What do you think?
Click to expand...
Another words, the flapper will not seal when it's suppose to, causing drops in pressure and increase in spool up time. Fix it.
 
LoL Harsh, but oh so helpful..I love you..In a completely heterosexual way of course! haha
It's on the to do list for later today when I get off of work! Thanks for all the input! Oh, you guys think by the flapper being able to open maybe 2 or 3 cm it can cause that much of a drop in pressure??

Josh
 
oldman said:
No offense but I'm a little disappointed in your respones, considering how helpful your posts usually are and how long you've been around.
Click to expand...

I was simply talking about the compressor housing bolts as they are obviously loose, he already stated that he was going to do a boost leak test...
 
CanadianTSi said:
I was simply talking about the compressor housing bolts as they are obviously loose, he already stated that he was going to do a boost leak test...
Click to expand...
My appoligies then :) , I thought you were refering to this.

Alright, I am about 100% positive that I have a boost leak, and I know you all are thinking. Just do a boost leak test, which I will. I was just wondering if you guys think this could be where it is(I checked and made sure all my couplers were as tight as I could get them). I've heard if these bolts aren't all tight that it can leak.. What do you guys think?
Click to expand...

Could i put alittle of the soap on the turbo, around that area and turn it on and see if it bubbles? Any prob w/ that?
Click to expand...
 
Got the boost kickin!!!! WHOOOOOOO! haha. I am only running 4 psi...but I don't care, I will also still perform a boost leak test to see if I should be pushing more, or if that actuator is just set at that much. Thanks for all of you guys' help!! It turned out that tightening those bolts solved the prob!!

Thanks again,
Josh

The boost is awesome!
 
oldman said:
That's cute.. ROFL J/K Glad you got it working.
Click to expand...

...asshole. hahaha...Cute, adorable, pretty, beautiful, CALL IT WHAT YOU WILL...I DON'T CARE!! I'M BOOSTING DAMNIT LoL thanks for all your help Bruce...You're a very..wise....man...LoL(surely you've never gotten that b4) :rolleyes:

Josh
 
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