IPD sale Volvo Parts
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

1999 S70 GLT - What is this pipe for? Topic is solved

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.
1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70
scot850
Posts: 5447
Joined: Mon Apr 05, 2010 2:46 pm
Year and Model: 2000 V70 R
Location: Calgary, Alberta, Canada
Has thanked: 6 times
Been thanked: 127 times
Canada
scot850

1999 S70 GLT - What is this pipe for?

Post by scot850 » Mon Mar 11, 2019 5:42 pm

Normally I would do more research but in the middle of 2 x house renos so help would be appreciated.

A buddy contacted me asking what this pipe does as he needs to replace it on his car as it is perished.

I have posted a picture of my cars engine (00 V70R) but pipe is in the same location so hopefully serves the same purpose.

The pipe in question is the one in the top middle of the intake manifold with the silver pipe clamp on it. I had a quick look but can't figure out where it goes and my ETM hides it. I think it runs to a 'T' near the alternator and looks like it runs to a valve on the top LHS of the radiator and not sure where the other end goes. I think it is a return pipe to the fuel tank. I believe it may be part of the Emissions or fuel system.

Help appreciated.
2000 V70 Turbo intake 003.JPG
Intake manifold
Neil.


2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

User avatar
abscate
MVS Moderator
Posts: 16595
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 157 times
Been thanked: 477 times
Trinidad & Tobago
abscate

Re: 1999 S70 GLT - What is this pipe for?  Topic is solved

Post by abscate » Mon Mar 11, 2019 6:37 pm

It's the evap purge takeoff. It goes to a T with one branch going down to the snorkel in front if the turbo, and the other branch connecting to the evap purge valve on the radiator.

There are check valves in each circuit.

Under calm running, the manifold side pulls the purge vacuum when commanded by the purge valve.

Under boost, the snorkel vacuum does that job.
These users thanked the author abscate for the post:
scot850


1 SWMBO for 30 years
2 Volvos
3 VWs
4 Careers
5 cats/dogs/gears
6 Perfect Ladies in waiting
7 Drivers
8 Boats- with a big pointy metal thing on top

1999 V70 T5M 56 2005 V70 NA M56 VWs BMW

scot850
Posts: 5447
Joined: Mon Apr 05, 2010 2:46 pm
Year and Model: 2000 V70 R
Location: Calgary, Alberta, Canada
Has thanked: 6 times
Been thanked: 127 times
Canada
scot850

Re: 1999 S70 GLT - What is this pipe for?

Post by scot850 » Mon Mar 11, 2019 7:19 pm

Thanks abscate! I knew I was on the right line but you make it much more clear. It now all comes rushing back, the nightmare of the AWD rear axle and fuel/emissions system rebuild on the 'R'. Still makes me shudder to think on it!

Much appreciate the info and will now pass on to my friend who will also pass on a big thanks I'm sure.

Neil.


2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

User avatar
abscate
MVS Moderator
Posts: 16595
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 157 times
Been thanked: 477 times
Trinidad & Tobago
abscate

Re: 1999 S70 GLT - What is this pipe for?

Post by abscate » Mon Mar 11, 2019 7:58 pm

If you search for my poor cold idle thread I drew a diagram for this as it turned out to be root cause, nasty rotted vacuum lines. One of mine had rotted into two strips of rubber


1 SWMBO for 30 years
2 Volvos
3 VWs
4 Careers
5 cats/dogs/gears
6 Perfect Ladies in waiting
7 Drivers
8 Boats- with a big pointy metal thing on top

1999 V70 T5M 56 2005 V70 NA M56 VWs BMW

scot850
Posts: 5447
Joined: Mon Apr 05, 2010 2:46 pm
Year and Model: 2000 V70 R
Location: Calgary, Alberta, Canada
Has thanked: 6 times
Been thanked: 127 times
Canada
scot850

Re: 1999 S70 GLT - What is this pipe for?

Post by scot850 » Mon Mar 11, 2019 9:52 pm

Thanks again.

Neil.


2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

Post Reply