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




Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIII-A3/B4 TDIs

VW MKIII-A3/B4 TDIs This is a discussion about MKIII-A3/MkIII Jetta/Golf (<99.5) and B4 Passats (96,97) TDI's. Non TDI related postings will be moved or removed.

Reply
 
Thread Tools
Old August 11th, 2017, 02:16   #1
lisab4
Veteran Member
 
lisab4's Avatar
 
Join Date: Oct 2013
Location: Belgium
Question Vacuum tubing

What lengths and diameters do I need to replace all my B4/1Z vacuum hoses?
Also, the fuel hoses from the IP to the injectors.
__________________
1996 Passat B4 1.9TDI 1Z
lisab4 is offline   Reply With Quote
Old August 11th, 2017, 07:38   #2
jhax
Veteran Member
Default

5/16 inches and 1/4 inches for the fuel line, I want to say 1/8 inch for vacuum but I could be wrong.
jhax is offline   Reply With Quote
Old August 11th, 2017, 17:51   #3
turbodieseldyke
Veteran Member
 
turbodieseldyke's Avatar
 
Join Date: Jun 2010
Location: Free Mustache Rides
TDI(s): 98 jetta
Fuel Economy: 50
Default

Search Button is your friend.
turbodieseldyke is offline   Reply With Quote
Old August 12th, 2017, 14:10   #4
moroza
Veteran Member
 
Join Date: Nov 2016
Location: PDX
Default

Search Button gives conflicting answers.

I used about 3.5 meters of 3mm, and 1 meter of 5mm. This was enough for all vacuum lines including the one inside the ECU, but I don't think it includes the recirculation valve (for the cabin air, not EGR). I used silicone which is fairly stretchy, so my diameters may be slightly off.

Be very careful removing the blue hose to the wastegate actuator. It's hard to reach, even harder to see, and I broke the nipple off the actuator, then spent a while removing and repairing it.
__________________
94 BMW 544iT "Sleipnir", round lights, 3 pedals, 2-box body, RWD
81 Toyota 4x4 "Hilda", round lights, 3 pedals, 2-box body, R/4WD
73 Ford P400 "Mothership", round lights, 3 pedals, 2-box body, RWD
96 Passat TDI "Black sheep", square lights, 3 pedals, 3-box body, FWD
moroza is offline   Reply With Quote
Old August 13th, 2017, 05:47   #5
lisab4
Veteran Member
 
lisab4's Avatar
 
Join Date: Oct 2013
Location: Belgium
Default

Thanks! I assume the 5mm is for the fuel lines?
All hoses are gone (total restoration & rebuild engine. Will be fun figuring out what connects where
__________________
1996 Passat B4 1.9TDI 1Z
lisab4 is offline   Reply With Quote
Old August 13th, 2017, 08:01   #6
JETaah
 
Join Date: Jan 2001
Location: mi 48xxx
Fuel Economy: 53 max, 42 min, average 46
Default

5mm is for the EGR valve to N18 connection and vents to the air box.
I don't think that the VW braided vacuum hoses are diesel fuel compatible.
They have a special one denoted with a yellowish stripe on the braiding for the injector return lines...at least the ones that I have seen.
__________________
1999.5 a4 Jetta, port matched, RC2, sprint 520's, 1.5" lift kit
1996 Passat B4V, coat hanger supported exhaust system,
Visit me www.martinbergelllc.com
JETaah is offline   Reply With Quote
Old August 13th, 2017, 11:32   #7
pdq import repair
Veteran Member
 
Join Date: Nov 2016
Location: idaho
Fuel Economy: 38.5
Default

VW braided vacuum line will not stand up to diesel fuel as mentioned above. You need the special yellow stripe stuff for sure there.

5 and 7mm fuel lines come in smooth skin too if needed. Might be wise to talk to a VW parts guy or a smart independent locally.
pdq import repair is offline   Reply With Quote
Old August 13th, 2017, 19:28   #8
ToddA1
Veteran Member
 
Join Date: Aug 2011
Location: NJ 08002
Fuel Economy: Dismal
Default

I bought a bunch of the smaller stuff and don't remember seeing a yellow stripe.

http://www.autohausaz.com/search/pro...el%20Hose/Line

The return lines Kerma sent me, with injectors, don't have the stripe, either.

-Todd
__________________
'96 B4V: Kerma tune and PP520s
'97 B4: Stock
Rabbit build
ToddA1 is offline   Reply With Quote
Old August 14th, 2017, 04:06   #9
JETaah
 
Join Date: Jan 2001
Location: mi 48xxx
Fuel Economy: 53 max, 42 min, average 46
Default

VW's part number for return lines is 059130329

http://www.dbwllc.net/product/059-13...odiesel-rated/
Maybe the yellow stripe is meant to be compatible with biodiesel as well as D2...Don't know. I don't see the stripe in the pictures, though.

The return lines that Kerma/DBW has sent me with the injector rebuilds in the last few years has always had the yellow stripe. It is faint but, it is there.
__________________
1999.5 a4 Jetta, port matched, RC2, sprint 520's, 1.5" lift kit
1996 Passat B4V, coat hanger supported exhaust system,
Visit me www.martinbergelllc.com
JETaah is offline   Reply With Quote
Old August 14th, 2017, 10:09   #10
lisab4
Veteran Member
 
lisab4's Avatar
 
Join Date: Oct 2013
Location: Belgium
Default

Questions:
* The white plastic vacuum line on the right of the engine goes to? Heater core?
* The vacuum line from the ECU goes to? Intake manifold?
* Black plastic line/rubber line goes from N18 to vacuum pump?
__________________
1996 Passat B4 1.9TDI 1Z
lisab4 is offline   Reply With Quote
Old August 14th, 2017, 15:52   #11
turbodieseldyke
Veteran Member
 
turbodieseldyke's Avatar
 
Join Date: Jun 2010
Location: Free Mustache Rides
TDI(s): 98 jetta
Fuel Economy: 50
Default

http://pics.tdiclub.com/data/516/med...um_Diagram.jpg
turbodieseldyke is offline   Reply With Quote
Old August 14th, 2017, 17:26   #12
lisab4
Veteran Member
 
lisab4's Avatar
 
Join Date: Oct 2013
Location: Belgium
Default

This is how I see it
__________________
1996 Passat B4 1.9TDI 1Z
lisab4 is offline   Reply With Quote
Old August 14th, 2017, 18:21   #13
turbodieseldyke
Veteran Member
 
turbodieseldyke's Avatar
 
Join Date: Jun 2010
Location: Free Mustache Rides
TDI(s): 98 jetta
Fuel Economy: 50
Default

Ecu goes to Intercooler pipe, not intake.

"Heater core" is actually the Recirc door, but in the same general area.
turbodieseldyke is offline   Reply With Quote
Old August 15th, 2017, 03:27   #14
lisab4
Veteran Member
 
lisab4's Avatar
 
Join Date: Oct 2013
Location: Belgium
Default

I see no nipple on the intercooler piping?
And where does the intake nipple go to then?
__________________
1996 Passat B4 1.9TDI 1Z

Last edited by lisab4; August 15th, 2017 at 06:21.
lisab4 is offline   Reply With Quote
Old August 15th, 2017, 03:46   #15
lisab4
Veteran Member
 
lisab4's Avatar
 
Join Date: Oct 2013
Location: Belgium
Default

This is my intake. The European one has the EGR valve bolted to it, not one part like the US.
__________________
1996 Passat B4 1.9TDI 1Z
lisab4 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
Turbo vacuum tubing Inline4 TDI 101 5 October 1st, 2013 09:43
Vacuum Tubing For Injection System DAH VW MKIV-A4 TDIs (VE and PD) 3 August 10th, 2006 14:15
fuel line is same as vacuum tubing? tiredone2 VW MKIV-A4 TDIs (VE and PD) 1 August 12th, 2004 23:45
vacuum tubing manapy VW MKIV-A4 TDIs (VE and PD) 4 March 5th, 2004 07:18
Silicone vacuum tubing paramedick Upgrades (non TDI Engine related) 4 November 7th, 2003 12:30


All times are GMT -7. The time now is 01:36.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2017, 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 0.15378 seconds with 13 queries
[Output: 122.79 Kb. compressed to 101.42 Kb. by saving 21.37 Kb. (17.40%)]