www.tdiclub.com

Economy - Longevity - Performance
The #1 Source of TDI Information on the Web!
Forums Articles Links Meets
Orders TDI Club Cards TDIFest 2016 Gone, but not forgotten VAG-Com List Unit Conversions TDIClub Chat Thank You

Order your TDIClub merchandise and help support TDIClub


Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW B5 Passat TDIs

VW B5 Passat TDIs This is a general discussion about B5 Passat(>98 (2004-2005 in North America)). Non TDI related postings will be moved or removed.

Reply
 
Thread Tools
Old June 24th, 2019, 10:47   #1
MagnumVW
Member
 
Join Date: Jun 2013
Location: Salt Lake City, UT
Default Viton O-rings for Boost Leak?

Mods completed on the car: manual swap, BSM delete, stage 2 from tdtuning.

I had what I thought was a boost leak sound coming from my BHW when I first added the stage 2 tune, but my father thought otherwise. Well, my turbo failed (most likely from being overworked due to boost leak), so I replaced it. I also replaced all of the O-rings on the charge piping with the idparts OEM O-ring kit found at https://www.idparts.com/intercooler-...hw-p-5448.html. I also cleaned out each of the connections for the pipes very well, as they had a lot of gunk in them from leaking charged air.

I also checked all of the intake piping for holes after cleaning them off really well but noticed no cracking or holes whatsoever. When I first fired the car up after doing all of the above, I noticed better throttle response and higher MPG (high 30s) than I had before, but after about 3 drives around town the same boost leak noise is back and my throttle response is back to being less than ideal, and I'm back to the lower MPG (low 30s).

IDparts told me over the phone that they've never had complaints with their o-ring kits, but I'm suspecting that the O-rings still aren't adequate for my stage 2 tune after I completed a manual swap. Kerma sells viton O-rings that they claim seal better than the OEM ones. Has anyone had any experience with the Kerma viton o rings sealing better? Should I maybe get some custom O rings that are slightly oversized instead? For example, the stock o rings are 4mm x 48mm for the larger ones and 4mm x 42mm for the smaller one coming out of the turbo. I could maybe try to get 5mm x 48mm and 5mm x 42mm O rings. What do you all think?

Last edited by MagnumVW; June 24th, 2019 at 15:26.
MagnumVW is offline   Reply With Quote
Old June 24th, 2019, 16:01   #2
stevekris
Veteran Member
 
Join Date: Jan 2005
Location: Indianapolis IN
Default

do not use o rings, use the correct seals, they have a square cross section.
sorry, saw you are using the correct seals.
check the 90 degree hose at the rear of the engine carefully for splits.
Hope this helps. Thank you
Steve

Last edited by stevekris; June 24th, 2019 at 16:04.
stevekris is offline   Reply With Quote
Old June 24th, 2019, 16:08   #3
MagnumVW
Member
 
Join Date: Jun 2013
Location: Salt Lake City, UT
Default

Quote:
Originally Posted by stevekris View Post
do not use o rings, use the correct seals, they have a square cross section.
sorry, saw you are using the correct seals.
check the 90 degree hose at the rear of the engine carefully for splits.
Hope this helps. Thank you
Steve
Thanks Steve, I will for sure look at the 90 degree hose today and make 100% certain that it is not split in any way. I keep reading that that seems to be a common happening with these engines, so I hope that is the issue at hand since it's easily fixed by replacing it.
MagnumVW is offline   Reply With Quote
Old June 27th, 2019, 13:41   #4
Scubanero
Veteran Member
 
Scubanero's Avatar
 
Join Date: May 2007
Location: Calgary AB
Default

Quote:
Originally Posted by stevekris View Post
do not use o rings, use the correct seals, they have a square cross section.
sorry, saw you are using the correct seals.
check the 90 degree hose at the rear of the engine carefully for splits.
Hope this helps. Thank you
Steve
What is the issue with standard O-rings? I found air leaking at the turbo outlet. Square ring looked OK but leaked so I replaced it with a 2 x 1/8.
__________________
There are 10 kinds of people in the world: those that understand binary and those that don't.
Scubanero is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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
Boost leak? Vacuum leak? actuator? olsont VW MKV-A5 Golf/Jettas 1 March 19th, 2015 10:33
LF Viton O Rings - GTA GD Ontario 2 March 23rd, 2014 15:33
Boost leak at factory patched boost pipe hole!!?? 47Chevy VW MKV-A5 Golf/Jettas 32 June 14th, 2010 21:56
viton o-rings naturist Alternative Diesel Fuels (Biodiesel, WVO, SVO, BTL, GTL etc) 6 August 29th, 2006 05:24
Another oil leak thread /Viton tubing caveat trae VW MKIII-A3/B4 TDIs 6 April 1st, 2003 07:48


All times are GMT -7. The time now is 11:37.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright - TDIClub Online LTD - 2017
Contact Us | Privacy Statement | Forum Rules | Disclaimer
TDIClub Online Ltd (TDIClub.com) is not affiliated with the VWoA or VWAG and is supported by contributions from viewers like you.
1996 - 2017, All Rights Reserved
Page generated in 0.15364 seconds with 12 queries
[Output: 66.04 Kb. compressed to 59.12 Kb. by saving 6.92 Kb. (10.48%)]