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S70 rear exhaust cam seal continues to leak

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1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
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rnelson1020
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S70 rear exhaust cam seal continues to leak

Post by rnelson1020 »

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.
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misha
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Re: S70 rear exhaust cam seal continues to leak

Post by misha »

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
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RickHaleParker
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Re: S70 rear exhaust cam seal continues to leak

Post by RickHaleParker »

Do the PCV glove test.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
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amblerman
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Re: S70 rear exhaust cam seal continues to leak

Post by amblerman »

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: 26
Joined: Wed Oct 21, 2009 11:36 am
Year and Model: S60R, 2013
Location: Tennessee

Re: S70 rear exhaust cam seal continues to leak

Post by rnelson1020 »

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.
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misha
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Re: S70 rear exhaust cam seal continues to leak

Post by misha »

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
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RickHaleParker
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Re: S70 rear exhaust cam seal continues to leak

Post by RickHaleParker »

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
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
rnelson1020
Posts: 26
Joined: Wed Oct 21, 2009 11:36 am
Year and Model: S60R, 2013
Location: Tennessee

Re: S70 rear exhaust cam seal continues to leak

Post by rnelson1020 »

Mucho thanks. I did the glove test and it inflated. I am now in the process of renewing the PCV system. I'm also trying to remove the oil pan to check things out with oil pickup, etc. Having difficulty getting any sort of wrench, socket, etc. on the front corner passenger side bolt on the oil pan. Will try removing the wheel and fender liner for access. I keep wondering how much longer I'll keep this 1998 car going but it just doesn't seem to want to die and it just runs and drives so well, even with 270,000+ miles.
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RickHaleParker
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Re: S70 rear exhaust cam seal continues to leak

Post by RickHaleParker »

rnelson1020 wrote: Sat May 30, 2020 4:35 pm I'll keep this 1998 car going but it just doesn't seem to want to die and it just runs and drives so well, even with 270,000+ miles.
If you keep up the maintenance and repairs you got another 270,000 miles to go.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
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