Welcome to the North American Subaru Impreza Owners Club Thursday July 10, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Factory 2.5L Turbo Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 03-22-2008, 09:49 PM   #1
ioeth
Scooby Newbie
 
Member#: 173554
Join Date: Mar 2008
Chapter/Region: South East
Location: Raleigh, NC, USA
Vehicle:
2004 Impreza WRX STi
World Rally Blue

Default Just installed VF22 on the STi has a coolant leak...please help

I bought Black Metal's old VF22 that's been ported, polished, upgraded wastegate, and 20G compressor wheel. It's got about 12k-15k miles on it now, but is still in perfect condition.

But, when we put it on the STi today, it is leaking water out onto the uppipe. It seems to be coming from either the coolant inlet or outlet holes on the side of the turbo, where the banjo bolts are. I can't tell exactly where it's coming from since I can't see that side of the turbo with the intercooler installed, though.

So one of my questions is could it be leaking directly out of the turbo housing somewhere, or is it more likely just those banjo bolts? I do have the washers from my VF39, which just came off, and the ones that came on the VF22, except for 2 that we dropped and can't find.

Do I need to go to my Subaru dealership and get some brand new ones, or should these old ones work? At any rate, what are the torque specs for those banjo bolts, so I don't crush the washers?

Any input would be appreciated!

--Matt
* Registered users of the site do not see these ads.

Last edited by ioeth; 03-22-2008 at 09:49 PM. Reason: made it easier to read
ioeth is offline   Reply With Quote
Old 03-23-2008, 12:41 AM   #2
mattjk
*** Banned ***
 
Member#: 16615
Join Date: Mar 2002
Location: Huntington Beach
Vehicle:
I ♥ my TE51
2009 Nissan 370z

Default

the vf22's lower coolant pipe doesn't quite fit right, and hits a very sharp edge of the bellhousing, or was it the block, I don't remember... anyhow, if yours did hit, it could be cracked there.

You can reuse old copper washers if you heat them up, but for how cheap they are, just buy new ones.
mattjk is offline   Reply With Quote
Old 03-23-2008, 03:18 PM   #3
ioeth
Scooby Newbie
 
Member#: 173554
Join Date: Mar 2008
Chapter/Region: South East
Location: Raleigh, NC, USA
Vehicle:
2004 Impreza WRX STi
World Rally Blue

Default

Well, we tried sealing up the banjo bolts really well and it seems to still be leaking, plus the car is overheating (haven't let it, it was just creeping way up). I've gone ahead and pulled the turbo back off to look around and see if we damaged any of the other coolant lines in the install process.

Couldn't see any damage, and none of the piping looks cracked. But, when it is leaking, there is no spray, and water is getting on top of the turbo-to-uppipe flange, so that means it must be coming from there or higher.

I'm not familiar with the internals of turbos, but I'm starting to think that it might be leaking out of the turbo housing itself. There aren't any apparent cracks, but it seems like it could be coming from the joint where the clamp holds the turbo together.

Can anybody confirm that this could be the problem, or offer ideas for other areas to look? Thanks a ton!
ioeth is offline   Reply With Quote
Old 03-24-2008, 10:53 PM   #4
ioeth
Scooby Newbie
 
Member#: 173554
Join Date: Mar 2008
Chapter/Region: South East
Location: Raleigh, NC, USA
Vehicle:
2004 Impreza WRX STi
World Rally Blue

Default

So I put everything back together today, and replaced the stock spring clamps on the coolant lines with screw-type hose clamps. Everything works great!

I still got a TON of steam driving around for the first ten minutes, even after it idled in the garage for about half an hour. The engine never went beyond normal operating temperature, and after a few miles, the steam went completely away. I guess a ton of it leaked out and got into the heat shields and everywhere, and that's what caused the scare on the first day. Ah well, now I know.
ioeth is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Turbo install, leaking coolant. someone please help WILLFUTHEGREAT Factory 2.0L Turbo Powertrain 8 03-26-2008 05:29 PM
Has anyone actually installed a Stromung DP on the STI yet? Wolfen42 Factory 2.5L Turbo Powertrain 2 08-28-2004 11:48 AM
Has anyone done a Defi boost gauge/timer install on the STi? OldSkewS4 Factory 2.5L Turbo Powertrain 4 12-17-2003 02:25 PM
Has anyone installed a Kartboy shortshifter (GC8) on the STi short shift linkage? SC WRX Transmission (AT/MT) & Driveline 0 04-25-2003 05:04 PM
Just installed VF22 and up-pipe...cool fc3swrx Factory 2.0L Turbo Powertrain 30 01-13-2003 12:20 AM


All times are GMT -4. The time now is 03:13 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.