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850 / S70 & V70 '96-'99 / C70 '97-'05 General Forum for the 850 and P80-platform 70-series models |
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850 10v smoke on idleViews : 487 Replies : 12Users Viewing This Thread : |
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#1 |
Master Member
Last Online: Jul 17th, 2024 17:19
Join Date: Dec 2009
Location: Blickling,Norfolk
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Hi guys.
My 850 has all of a sudden started smoking very blue Smoke when on idle or blipping the throttle, both cold and hot makes no difference at all, it also makes a horrendous burning smell at this time. The car has had regular oil changes at 5K, is relatively low mileage at 120k. The PCV was changed just before I bought it but I had noted a little puffing from the dipstick. Any thoughts much appreciated
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Current Volvo 850 2.5 10V SE 1996 Volvo V70 2.5D 2000 Departed Volvo 850 T5 Turbo 'L94" 1994 Volvo 740 GLE 1990 |
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#2 | |
Master Member
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Do a glove test initially for the PCV Hope it’s not the rear main oil seal Last edited by Rich850R; Jun 28th, 2024 at 20:28. |
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#3 |
Master Member
Last Online: Jul 17th, 2024 17:19
Join Date: Dec 2009
Location: Blickling,Norfolk
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The PCV change was documented on hear by the previous keeper😁. On further investigation there appears to be a significant drip of oil at or around the slot on the bottom of the gear box, wasn’t there a week ago. I’m thinking that they may be related to the rear seal?
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Current Volvo 850 2.5 10V SE 1996 Volvo V70 2.5D 2000 Departed Volvo 850 T5 Turbo 'L94" 1994 Volvo 740 GLE 1990 |
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#4 | |
Master Member
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#5 |
Premier Member
Last Online: Today 15:00
Join Date: Jan 2011
Location: Horne (Nr. Horley)
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Indeed, but be very sure it is before you go pulling it apart. I had this, and figured it could also be the turbo oil pipe (assuming you have one) but it turned out to be simply the camshaft oil seal had popped out - probably also caused by blocked PCV, which I'd already fixed.
In any event it sounds as if you need to re-investigate the PCV, especially if it fails the glove test. Remember the port into the crank case can get blocked with carbon sludge, so even if you replace the PCV components if this is blocked then it still won't breathe properly. You might be able to clear it from above, but the best and most thorough way is to drop the sump. Quite involved to do this, but nothing like as bad as rear main seal!
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Some people are like Slinkies, they serve no useful purpose but they still bring a smile to your face when you push them downstairs. |
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#6 | |
Premier Member
Last Online: Jul 27th, 2024 20:20
Join Date: Dec 2002
Location: Co. Limerick, Ireland
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Liam... '96 854 TDI SE, '99 V70 2.5D S, '05 C70 2.0T Collection, '05 S80 2.0T SE, '15 V70 D4 SE Lux Nav. |
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