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PCV problem continues 850 2.5 1996 non turbo.

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- 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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wigsy7
Posts: 41
Joined: 31 October 2007
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PCV problem continues 850 2.5 1996 non turbo.

Post by wigsy7 »

Had smoke blowing out of oil dipstick tube for a while now, so replaced pcv system.Replaced oil seperator,cleaned hoses, connections and removed flame trap.(badly blocked) Still no improvement and only way to stop oil seeping slowly out of oil filler cap seal is to leave dipstick out slightly to allow engine to breathe (however at times fumes come into car through vents.)

Ive not replaced flame trap yet but would this make any difference to smoking dipstick anyway? Ive noticed that if I disconnect flame trap connection and hold thumb over its end, while engine running, it stops smoke coming out of dipstick tube(mean anything?) There is a smaller hose (vacuum hose?) running alongside larger hose between oil seperator and flame trap and could not be sure this was not blocked but larger hose ok,would this create a problem if also blocked?

MadeInJapan
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Year and Model: '98 S70 T5 '07S40T5
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Post by MadeInJapan »

Did you replace the larger and smaller hose that connects to the base of the accordion hose and also clean out the nipple at the accordion hose? These would all make a difference- if any of these are clogged up, you're still going to get positive pressure.
'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

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