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This does not seem good 94 850 smoke and crankcase pressure

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
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1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
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skloon
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This does not seem good 94 850 smoke and crankcase pressure

Post by skloon » Thu Apr 05, 2018 3:52 pm

Driving my RN swapped 94 850 turbo it has about 175000km on the engine and runs strong, lately I swear that it has been smoking but had to tell as it has been cold and it could just be steam, today coming to work I could tell it was nice blue grey smoke when I got off the throttle. When I got to work I opened the hood and when I opened the oil cap it actually popped at me. The PCV system was done about 20000km ago all new parts so I don’t quite know where to start. I fear a head gasket but the cap is free of sludge, of course it will be cold as heck for the next few weeks so I will not be able to wrench too much but wonder what the heck is going on

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Re: This does not seem good 94 850 smoke and crankcase pressure

Post by tryingbe » Thu Apr 05, 2018 4:09 pm

I'd upgrade the hoses and drill the hole bigger.


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scot850
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Re: This does not seem good 94 850 smoke and crankcase pressure

Post by scot850 » Thu Apr 05, 2018 8:11 pm

What oil viscosity are you running?

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

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skloon
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Re: This does not seem good 94 850 smoke and crankcase pressure

Post by skloon » Thu Apr 05, 2018 8:37 pm

Mobill one 0w30

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Re: This does not seem good 94 850 smoke and crankcase pressure

Post by abscate » Fri Apr 06, 2018 1:50 am

Pull the dipstick and vent the tube to ground with hose to temporarily relieve crank pressure and save the seals. The Volvo seals, not those cute baby harp seals
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skloon
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Re: This does not seem good 94 850 smoke and crankcase pressure

Post by skloon » Fri Apr 06, 2018 9:19 am

So I drove to work this am with the oil cap off-the smoke seems gone but it was -17 so lots of steam, where is the pressure coming from and how does the smoke appear ?

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Re: This does not seem good 94 850 smoke and crankcase pressure

Post by scot850 » Fri Apr 06, 2018 10:06 am

That oil is way too thin for a 94. Try running at least a 5W-30 for winter as per handbook and 10W-30 summer (I think I got that the right way around). For my 2000 models they specify 5W-40 oil.

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

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skloon
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Re: This does not seem good 94 850 smoke and crankcase pressure

Post by skloon » Fri Apr 06, 2018 11:23 am

Okay, the engine is out of an 04 so when I tear out the PCV system and replace I will do the spring oil change

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Re: This does not seem good 94 850 smoke and crankcase pressure

Post by scot850 » Fri Apr 06, 2018 2:23 pm

Even for an 04 my friend that is too thin I would suggest. Our 06 XC70 specifies 5W-30 oil.

The later version of the PCV system typically has less issues but is not immune depending on servicing history.

Good luck!

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

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