Smoke from dipstick, changed PVC and cleaned PTC

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1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
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dereswyman
Posts: 4
Joined: Sat Oct 03, 2009 1:33 am
Year and Model: 1994 855 T5
Location: Seattle

Smoke from dipstick, changed PVC and cleaned PTC

Postby dereswyman » Mon Oct 12, 2009 2:47 am

I just replaced the PVC system and cleaned out the PTC nipple. I still have smoke coming from the dipstick. What else could be it? This car is starting to get on my nerves. It drives really nicely but with this positive pressure, I don't know how much longer it'll last. Does it take time for the smoke to disappear? Would doing an oil change help it? I've done about 1700 miles since the last change.
1994 855 T5 147K

misha
Posts: 2602
Joined: Sun Dec 07, 2008 11:09 pm
Year and Model: '97 850 2.5 20v
Location: Serbia
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Re: Smoke from dipstick, changed PVC and cleaned PTC

Postby misha » Mon Oct 12, 2009 10:43 pm

Did you cleaned up the holes in engine block where hoses from pcv box are connected?If not,it's the same like you didn't replaced pcv system.

If you did...i think i read somewhere at this forum that some members also had a smoke from a dipstick after pcv job and after a couple hundreds of miles it dissapeared.
'97 850 2.5 20v /fully equipped/ Motronic 4.4 / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic/petrol+LPG
History of Volvos in the family:
'71 144 De luxe
'73 144 De luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

dereswyman
Posts: 4
Joined: Sat Oct 03, 2009 1:33 am
Year and Model: 1994 855 T5
Location: Seattle

Re: Smoke from dipstick, changed PVC and cleaned PTC

Postby dereswyman » Tue Oct 13, 2009 1:04 am

Yep, the holes were cleaned. But I guess I'll just put in a few miles into it first and see how it goes. I'll also get the oil changed asap. Would performing a seafoam cleaning help it?

Thanks for your help.
1994 855 T5 147K

wjhandy850
Posts: 128
Joined: Tue Oct 13, 2009 2:40 am
Year and Model: 854 GLT 1997
Location: Ga

Re: Smoke from dipstick, changed PVC and cleaned PTC

Postby wjhandy850 » Tue Oct 13, 2009 1:53 pm

I too am getting smoke after replacing pvc system on my 97 850 GLT. I cleaned the PTC with various cleaners. I didn't use the pipe cleaners as previously directed I cleaned the holes in the block but they didn't seem to be noticeably blocked I got a vacuum to draw some oil through. I also just got the head gasket replaced with a used rebuilt head. What are the proper Volvo servicing procedure on cleaning/replacing pvc system? I am now riding with dipstick slightly opened to keep the pressure from building up.

volvomileage
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Re: Smoke from dipstick, changed PVC and cleaned PTC

Postby volvomileage » Tue Oct 13, 2009 10:03 pm

reading all this and having the same problem i am woundering if a defective or stuck egr valve can cause this condition..

the two holes on the block were barely dirty when i took it apart there was traces of solid oil really nothing to write home about, but the holes were clear no blockage... plus the oil trap was empty...but the rubber piping was gone unflexible and solid i guess the previous owner just cleaned everythig and put it back together...i changed about everything used and engine flush in the oil to finish with and oil change and still smokes..

i am really thinking the must be something wrong with the egr valve..

any ideas ?
volvo 850 95 sedan non/turbo 185 k

misha
Posts: 2602
Joined: Sun Dec 07, 2008 11:09 pm
Year and Model: '97 850 2.5 20v
Location: Serbia
Flag: Serbia

Re: Smoke from dipstick, changed PVC and cleaned PTC

Postby misha » Tue Oct 13, 2009 10:13 pm

I don't know guys...Mij have the same problem.He replaced complete pcv system and cleaned egr system (in detail) on his non turbo model and still have positive pressure from oil dipstick.No oil consumption and everything is fine with the car except that smoke from dipstick.
'97 850 2.5 20v /fully equipped/ Motronic 4.4 / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic/petrol+LPG
History of Volvos in the family:
'71 144 De luxe
'73 144 De luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

MadeInJapan
MVS Moderator
Posts: 12762
Joined: Thu Mar 31, 2005 2:14 pm
Year and Model: '98 S70 T5 '07S40T5
Location: Knoxville, TN American but born in Japan
Flag: United States of America

Re: Smoke from dipstick, changed PVC and cleaned PTC

Postby MadeInJapan » Sat Oct 17, 2009 2:12 pm

Yeah, tell me about it! I also have an exhaust cam seal leak now- I just keep adding oil. I'm a bit afraid to fix that as the positive pressure is sure to blow another seal- maybe this time the rear-main- something I don't want.
'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
'07 S40 T5 AWD 6 speed manual! Silver/Black Stage1 Heico & Elevate
'07 S60 2.5T Blue/Taupe- my kid's Volvo

volvomileage
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Joined: Tue May 13, 2008 1:17 am
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Re: Smoke from dipstick, changed PVC and cleaned PTC

Postby volvomileage » Sat Oct 17, 2009 5:32 pm

there must be something to do about this a part from letting it vent through the dipstick tube.....would seafoam help ?

can it be the egr valve ?

its frustrating and it is more frustrating after you have cleaned and changed for brand new components...gezzzz
volvo 850 95 sedan non/turbo 185 k

MadeInJapan
MVS Moderator
Posts: 12762
Joined: Thu Mar 31, 2005 2:14 pm
Year and Model: '98 S70 T5 '07S40T5
Location: Knoxville, TN American but born in Japan
Flag: United States of America

Re: Smoke from dipstick, changed PVC and cleaned PTC

Postby MadeInJapan » Sat Oct 17, 2009 7:04 pm

I don't know- maybe someone has a recommendation? I changed out all PCV components and even cleaned the passages into the engine was well as cleaning out the EGR (thoroughly), but still no big difference. I get no codes and the car runs great otherwise.
'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
'07 S40 T5 AWD 6 speed manual! Silver/Black Stage1 Heico & Elevate
'07 S60 2.5T Blue/Taupe- my kid's Volvo

xb corp
Posts: 131
Joined: Tue Oct 20, 2009 2:02 am
Year and Model: 855GT5 '96
Location: Johor Bahru, Malaysia

Re: Smoke from dipstick, changed PVC and cleaned PTC

Postby xb corp » Thu Oct 22, 2009 12:46 am

hey guys..
i have been seeing many 850s with this problem, especially the turbo ones. but instead of PCV or EGR systems fault, i am looking at other possibility.

why is there oil vapor/ smoke?
possibly because the oil is boiling, right? the temp of the oil could be exceeding 150C, so it starts to boil and cause smoke.

primarily we can say that the PCV is clogged so there is no proper circulation/ suction of the smoke off the engine internal. but what if the PCV is new? and there is still smoke?

so the next step is checking the engine cooling system.
first, make sure that your coolant passage is cleared, especially the thermostat and water pumps. next is the water circulation at the turbo.
then, you can check the engine oil cooler (for turbo only). the hoses on the right side of the radiator. changing oil frequently or changing with oil with higher boiling point could also solve this problem.

mine is 312,000km and upgraded to a bigger turbo which contributes "hotter" oil circulation, but no smoke. neither from dipstick, nor the oil filler cap.
on mineral Pennzoil API SM grade 20W-50 and Mann filter every 5000km.
'96 855GT5 324hp 386lb-ft
Nissan 16V turbo, HKS w/g, SS 2.5" d/p+FGK 3" exh, HKS Evo9 FMIC+2.5" piping, K&N, Apexi BOV, NA cams & t/b, portd head, 5 sub-injctrs, Mocal coolers, AMG 4pot 325mm, AVS 18", Bilstein B6/Vogtland


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