throttle body boost leak?

[bronson]

so i boost leak tested my 95' tsi and the only thing i could find leaking air was my throttle body. not the 4 bolts that hold it on but the idle adjustment bolt.... Is ok if it leaks from there or do i need to replace t/b ?

 

[blazebolt]

You will need to replace the throttle body seals. They tend to leak over time

http://www.plymouthlaser.com/tbor.htm

 

[ZmanIV]

Just get the real seals from MachV.com
http://www.machv.com/throtbodseal.html

 

[95CarbonEclipse]

That looks like a major PITA... has anybody here done this? And how much of a PITA is it?

 

[ZmanIV]

It is actually really easy.
the hard part was getting the return spring correctly wound back up without the catch wanting to rip a hole in my finger.

 

[kmoore]

I wouldn't say its too hard. But it is a PITA. I have done it on my 97 TB. Real time consuming. But, it really isn't too hard. Just take your time and do it right.

Hell, the hardest part for me was just getting the throttle cable disconnected from the actual throttle body

 

[turbosax2]

It is actually really easy.
the hard part was getting the return spring correctly wound back up without the catch wanting to rip a hole in my finger.

+1. Darn springs....

 

[95CarbonEclipse]

I've been needing to do this for a while but when I first read the vfaq on it, i thought... maybe i'll wait til I can afford a new TB.

 

[ericbev]

so i boost leak tested my 95' tsi and the only thing i could find leaking air was my throttle body. not the 4 bolts that hold it on but the idle adjustment bolt.... Is ok if it leaks from there or do i need to replace t/b ?

Correct me I if I wrong, but did he not say it was leaking around his BISS not his shaft seals? Replacing the O ring around the BISS is much much easier than doing the shaft seals. That is what you meant correct?


http://www.plymouthlaser.com/biss.htm

 

[Zenja]

Yeah, some of you need to learn how to read. He's talking about the BISS screw. Fixing this one is really easy.

 

[ZmanIV]

oops sorry

while you are at it just go ahead and do the TB shaft seals.

I used Dow silicone vacuum grease on all my seals when I replaced them

 

[blazebolt]

Haha, yeah I missed that too. The biss o-ring is easy to replace. Hopefully you don't have to take the TB off to get the screw out. If you do, I would replace the shaft seals while its off. Nothing like a new set of seals

 

[kenamond]

Why would he pull his TB off to replace the BISS O-ring? Then he has to worry about the TB gaskets sealing. If the BISS is the only thing leaking, I'd fix that first and make sure there aren't other TB leaks before ripping the TB off. If the BISS was the only problem, he's done.

 

[blazebolt]

Why would he pull his TB off to replace the BISS O-ring? Then he has to worry about the TB gaskets sealing. If the BISS is the only thing leaking, I'd fix that first and make sure there aren't other TB leaks before ripping the TB off. If the BISS was the only problem, he's done.

I suggested it only IF he had to take off the TB to get the biss screw out. I've read several posts of people who had difficulty getting the screw out with the TB still attached. If the screw gets stuck you can easily stick a screw driver or a long rod from the bottom to push the biss screw out. When I did my TB swap I could see how difficult it would be if it was still on.

 

[bronson]

thanks a lot for the help fellas