Question about 1996 Volvo 850

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1996 Volvo Oil Issue

I have a 1996 Vovlo 850 with $200k miles. Recently when I went to check the oil I notice this white slimey stuff mixed in with the oil. There is quite a bit of this. I don't really drive the car much, just back and forth to work which is about a 20 mile round trip...... Any ideas on what would be causing this.

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  • stans934 Mar 18, 2009

    Last oil change on our 1996 850 turbo (150K miles) the oil was black with no sludge however, the dip stick prior and after that shows the caramel colored sludge. No other fluids are escaping so the engine oil seems sound. I hear many responses such as PCV valve is bad or it does not get run long enough and condensation builds up. We replaced the oil cap however I'm thinking it may be the O-ring on the dip stick allowing condensation to enter and reside only on the stick base. Previous owner has had the engine flushed which makes me think he unloaded thinking the engine was going bad which has run great for over the last year. Does this Model experience ths problem often?

    Only other problem is how do we get the console off to replace the window switch which works intermitently?

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Change the oil and filter.  I had this same thing happen; the sludge reminded me of chocolate mousse...  The mechanic who takes care of my car pointed out it had been a while since my last oil filter change.  Over time the filter gets clogged, and the engine basically whips up it's own oil - a la mousse.  A more expensive possibility is that the PCV valve is clogged and needs to be changed.  Again, in this instance the engine can't breathe properly, so it not only whips the oil up, but starts to shoot it out the dipstick hole, sort of like when you have to breath through your mouth when your nose gets clogged up because of a cold.  Didn't seem to injure the car, or freak out the mechanic.  Best of luck.

Posted on Nov 20, 2008

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