White smoke from dipstick

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
Posts: 14
Joined: Tue Dec 10, 2013 8:35 am
Year and Model: 850 1996
Location: Sweden

White smoke from dipstick

Postby hollow » Sat Dec 14, 2013 10:58 am

So I thought it was time to check the PCV system today, I don't know if it has been cleaned or not.

I put a small plastic freeze bag over the oil cap, secured tightly by a rubber band. The bag did nothing - it didn't inflate and it wasn't sucked in either...

If I pushed it down it still didn't inflate.

However with the engine up to temp - I had white smoke Coming out of the dipstick...

Does this mean that I have to clean the system? Won't do it myself...

Posts: 817
Joined: Sun Oct 25, 2009 1:41 pm
Year and Model: V70 2000
Location: Blackpool

Re: White smoke from dipstick

Postby mikealder » Sat Dec 14, 2013 11:05 am

I would think the white "smoke" you saw coming out of the dipstick tube was steam, these engines will hold quite a bit of condensation which will boil out when the engine gets to temperature, if the bag didn't inflate I wouldn't think there is anything wrong with the PCV.
If the dipstick is getting a white mayo type coating on it then again this is water mixed with oil that condensates out due to the location of the dipstick tube which gets lots of cold air blown at it causing any steam to condensate back to water, mixed with oil this turns to the white mayo substance, try insulating the dipstick tube with some pipe lagging which will reduce the cooling effect of the air - Mike

User avatar
Posts: 6699
Joined: Sat Nov 05, 2011 4:40 pm
Year and Model: 850 T-5R Wagon
Location: Albuquerque, NM
Flag: United States of America

Re: White smoke from dipstick

Postby rspi » Sat Dec 14, 2013 11:29 am

If you have a bad elbow, torn or loose, on the side of the manifold near the power steering pump or at the PTC, you will get smoke out of the dipstick. Check for cracked or loose elbows.

Also, use a very soft plastic, like rubber glove or very thin shopping bag. A freezer bag is likely to stiff to respond to the minor vacuum changes.
'95 855 T-5R, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, '95 960, '97 960, '98 S90, '98 S70 GLT, '95 850 T-5R Yellow
Donate Today - Volvo Repair Videos

Return to “Volvo 850, S70, V70, C70 & V70-XC Forum (1992-2000)”

Who is online

Users browsing this forum: 101, BEJinFbk, Herb Goltz, shegarty and 48 guests

ViVA performance upgrades for Volvo cars