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!

S70 rear exhaust cam seal continues to leak

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

rnelson1020
Posts: 24
Joined: Wed Oct 21, 2009 11:36 am
Year and Model: S60R, 2013
Location: Tennessee
Has thanked: 0
Been thanked: 0
United States of America
rnelson1020

S70 rear exhaust cam seal continues to leak

Post by rnelson1020 » Tue May 12, 2020 10:04 am

1998 S70 GLT with approx. 200,000 on engine. Have replaced rear exhaust cam seal at least 4 times over the past several years. It begins leaking quite soon after doing so. I have used Volvo and OEM seals. Have never replaced rear intake exhaust cam seal and there is no observable leaking. Advice or thoughts?? Car runs and handles beautifully, otherwise. Thanks.

User avatar
misha
Posts: 4288
Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
Location: Serbia
Has thanked: 56 times
Been thanked: 130 times
Serbia
misha

Re: S70 rear exhaust cam seal continues to leak

Post by misha » Tue May 12, 2020 11:07 am

Pcv system overdue?
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

User avatar
RickHaleParker
Posts: 4200
Joined: Mon May 25, 2015 2:30 pm
Year and Model: See Signature below.
Location: Kansas
Has thanked: 3 times
Been thanked: 536 times
United States of America
RickHaleParker

Re: S70 rear exhaust cam seal continues to leak

Post by RickHaleParker » Tue May 12, 2020 4:00 pm

Do the PCV glove test.
--------
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.
Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.
Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
Platform P2 2004 S60R, B2524T4, AW50/51 AWD, Bosch Motronic 7.0, BorgWarner K24 turbocharger, Plant Ghent Belgium.

User avatar
amblerman
Posts: 337
Joined: Wed Jan 18, 2017 3:29 pm
Year and Model: 1999 s70
Location: Pennsylvania
Has thanked: 1 time
Been thanked: 35 times
United States of America
amblerman

Re: S70 rear exhaust cam seal continues to leak

Post by amblerman » Tue May 12, 2020 4:08 pm

If it's not clear why people are asking about PCV system and the glove test it's because if the PCV system is bad, it will lead to excessive crankcase pressure which pushes on all the seals in your engine.

And if the pressure is high, your cam seal could suffer and the excess presure could be the source of the continued failures.

-A

rnelson1020
Posts: 24
Joined: Wed Oct 21, 2009 11:36 am
Year and Model: S60R, 2013
Location: Tennessee
Has thanked: 0
Been thanked: 0
United States of America
rnelson1020

Re: S70 rear exhaust cam seal continues to leak

Post by rnelson1020 » Thu May 21, 2020 11:08 am

RickHaleParker wrote:
Tue May 12, 2020 4:00 pm
Do the PCV glove test.
Thanks. Not sure what the "glove test" is, but I'll check it out.

User avatar
misha
Posts: 4288
Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
Location: Serbia
Has thanked: 56 times
Been thanked: 130 times
Serbia
misha

Re: S70 rear exhaust cam seal continues to leak

Post by misha » Thu May 21, 2020 11:19 am

Open the hood,remove oil filler cap,put a latex glove onto the filler kneck,start the car and see if it inflates or it's being pulled down with vacuum.

If it inflates pcv system is clogged.
If not...it's ok.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

User avatar
RickHaleParker
Posts: 4200
Joined: Mon May 25, 2015 2:30 pm
Year and Model: See Signature below.
Location: Kansas
Has thanked: 3 times
Been thanked: 536 times
United States of America
RickHaleParker

Re: S70 rear exhaust cam seal continues to leak

Post by RickHaleParker » Thu May 21, 2020 12:19 pm

rnelson1020 wrote:
Thu May 21, 2020 11:08 am
Thanks. Not sure what the "glove test" is, but I'll check it out.
You check for crankcase pressure build up by tying a latex glove to the Oil filler. It should be a vacuum that suck it glove down. Pressure will push the glove up.

Pass


Fail
--------
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.
Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.
Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
Platform P2 2004 S60R, B2524T4, AW50/51 AWD, Bosch Motronic 7.0, BorgWarner K24 turbocharger, Plant Ghent Belgium.

Post Reply
  • Similar Topics
    Replies
    Views
    Last post