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'98 S70 engine head repair gone wrong

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

precopster
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Re: '98 S70 engine head repair gone wrong

Post by precopster » Tue Aug 15, 2017 4:23 am

To replace rod bearings they would have removed the sump. It wouldn't make any sense at all not to replace the o rings while in there. They are a $25 set.

Besides once the seal on the o rings is broken by removal of the sump there is no guarantee that they'll seal again unless they're replaced.

I think you need to have a chat with them as it seems this was a rushed reassembly.

If they agree to replace the o rings stress the importance of using anaerobic sealer on the sump such as Permatex 51813 or the Volvo genuine one as this ensures you protect the O2 sensor from silicon deposits that are in most sealers.
Current cars:2002 XC70, 2006 Ssangyong Rodius (Stavic), 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

scot850
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Re: '98 S70 engine head repair gone wrong

Post by scot850 » Tue Aug 15, 2017 10:21 am

Does your car have and engine oil cooler? If you don't know, there should be 2 pipes that connect to the RHS (left when looking down standing in front of the car) of the radiator. If you do, they have a problem with their oil seals leaking with age and the retaining piece also bends allowing oil to leak. It may not be the oil pan. Clean the area off and if you do have cooler lines there is a thermostat housing just under the crank shaft pulley on the RHS and the 2 pipes to the cooler attach there. After 98, the oil cooler re-located from the radiator to the back of the oil pan.

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

precopster
Posts: 7475
Joined: Sat Aug 21, 2010 12:20 am
Year and Model: Lots
Location: Melbourne Australia
Has thanked: 4 times
Been thanked: 108 times
Australia
precopster

Re: '98 S70 engine head repair gone wrong

Post by precopster » Thu Aug 17, 2017 2:08 am

Are we still chasing tappet noise on this car as you hadn't mentioned the noise was fixed that's why I mentioned o rings. A small oil leak won't cause tappet noise.
Current cars:2002 XC70, 2006 Ssangyong Rodius (Stavic), 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

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