I've been reading up on this smoking oil dipstick tube/oil port for Volvos and they all seem to stem around a clogged PCV system as being the root cause. We're looking at a 2005 Volvo S80 5cyl 2.5L Turbo engine with about 85K miles on it.
When I first bought it back in 12/2015 the breather hose (Volvo Crankcase Vent Hose - Genuine Volvo 8692217) was all brittle thin plastic and cracked up and exposing the valve cover breather hose port to the atmosphere. I replaced that right away with their modern rubber hose part. The oil was low too so that got changed just after purchase as well. There was a lot of sludge in the oil fill port too with little chunky nuggets of black stuff probably 5-6 in total each about 2x3mm wide.
With Volvo's there's this rubber glove test you see folks doing by placing a glove over the fill port to see if it inflates like a balloon, and likewise for the dipstick. I did that test sometime ago but found it sucking the glove in indicating there was no positive pressure which I'm told was the bad sign for the PCV system.
On a related note I'm burning oil; about 1qt every 2000 miles, since there's no visible leaks anywhere around the engine. I've gathered some data about oil consumption. It appears across a span of 11,508 mi I've needed to add about 5.3qt, averaging about 2174mi / qt.
72,683mi Oil change 74,846mi +2/3 qt added 75,659mi +3/4 qt added 78,140mi +1.0 qt added 80,813mi +3/4 qt added 81,812mi +.63 qt added 84,191mi +1.5 qt added
I ordered a full PCV kit and am going to check the ports to the engine are clear like shown here.
Anybody have any comments about what they'd recommend checking when faced with a smoky vehicle like this? Is this consistent with PCV trouble and is there a way to diagnose that without removing any parts?
Offering some more background the smoke comes on pretty quick, I don't think I have to drive very far but the images below were well into operating temperature for the engine, smaller trips have a small fraction of the smoke you see in the images below. The still images that comprise the gifs below were generated by holding down the camera shutter button on an Android cell phone going rapid fire mode about 1 a second I believe. The yellow arrow on the right indicates the start of the loop. I was able to image the smoke pretty well with the angle the sun was at.
Here's some related similar footage on Youtube from various folks
- Volvo XC70 D5-smoke from oil filler cap
- Volvo v70 d5 2006 95k miles smoking from dip stick & oil cap
- Volvo v70 smoke from oil checker
- What is a PCV system and how does it work? - Auto Information Series
- 1994 Volvo 850 Turbo wagon smoke from dipstick AFTER new PCV system
- volvo 850 / smoke from dipstick
- Volvo V70 D5 Oil Smoke