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Checking to see if PCV working

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, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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vantassell
Posts: 40
Joined: 24 Nov 2009, 14:20
Year and Model: 1998 V70 GLT
Location: SLC, UT

Checking to see if PCV working

Post by vantassell »

I heard that you can check to see if your PCV system is working (i think mine is not) by seeing if any smoke comes out of the dipstick while the engine is running. Also, you can hold the oil filler cap and kind of hover it over where it goes and see if there's any sort of vacuum that pulls the cap into place.

My car is showing smoke out of the dipstick hole (with the stick removed and engine running) as well as no vacuum while hovering the oil cap.

Do you guys think this means PCV problem for sure?

Ozark Lee
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Post by Ozark Lee »

With the oil cap sealed, engine on, stick a balloon over the dipstick tube and see if it inflates. If it inflates you need to service the PCV system.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

vantassell
Posts: 40
Joined: 24 Nov 2009, 14:20
Year and Model: 1998 V70 GLT
Location: SLC, UT

Post by vantassell »

Thanks Lee, that is a lot easier to decipher the results than the other two tests (i.e. go or no go). It's pretty easy to tell if a balloon is inflating or not :)

vantassell
Posts: 40
Joined: 24 Nov 2009, 14:20
Year and Model: 1998 V70 GLT
Location: SLC, UT

Post by vantassell »

I tried it with a glove (no balloon handy) tied with some string over the dipstick tube, and it was fully inflated by the time I had walked from the drivers seat to the front of the car. Suspicions confirmed :) thanks

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