IPD sale XeMODeX - Experts in Volvo Electronics
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy anything with this and it helps MVS!

1999 V70 XC AWD Turbo 2.4 - Blowoff valve diaphragm defective 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

User avatar
bmdubya1198
Posts: 4185
Joined: Tue Dec 30, 2014 10:45 am
Year and Model: 2K V70R M56
Location: Charlotte, NC
Has thanked: 45 times
Been thanked: 172 times
United States of America
bmdubya1198

Re: 1999 V70 XC AWD Turbo 2.4 - Blowoff valve diaphragm defective

Post by bmdubya1198 » Mon Jan 23, 2017 5:49 pm

No worse than a VW! Haha
Definitely replace the PCV parts. That hose shouldn't be broken.
2000 V70R Venetian Red/Charcoal M56 Swapped 198k
2003 S60 2.4T Silver/Black 116k
2007 XC90 V8 AWD Sport Titanium Grey/Black 173k
1991 944 Turbo Dark Green/Beige 174k
1992 245 Base White/Beige 249k
2006 BMW 330i
1999 BMW 528i
Sold-
2000 S70 GLT Mystic Silver/Taupe 253k
1993 944 Base Beige/Beige 221k
1998 V70 GLT Black/Beige 199k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green... crushed
2001 S60 2.4T Black/Black 230k
1988 744 Turbo M46 Beige Metallic/Beige 188k

User avatar
abscate
MVS Moderator
Posts: 21976
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 363 times
Been thanked: 1112 times
Trinidad & Tobago
abscate

Re: 1999 V70 XC AWD Turbo 2.4 - Blowoff valve diaphragm defective

Post by abscate » Fri Mar 10, 2017 10:25 am

Sorry - should have posted back on this one

Okay - there are a couple of diagrams in the VRD, but the short version is

One gets pressure from the turbo itself (to drive the waste gate valve - I don't think that should hold vacuum -when the engine is off that hose waits for boost from the turbo

One hose routes the boost pressure to the waste gate - that one should hold vacuum.

One hose dumps un used boost pressure back to the air duct, pre-turbo. That one will not hold vacuum.


Why don't you pop up to me and swap out my known good 99 TCV and see if it helps your boost one weekend??
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

Post Reply
  • Similar Topics
    Replies
    Views
    Last post