Question about 1997 Volvo 850

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97 volvo 850 with a milky dipstick, looks like a head gasket is in my future, any special knowledge needed, I've done many but not on this car yet, it'll be my firs, I've learned about the head bolt replacement, what is the torque procedure and any thing special about removing the head and putting it back on ?

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Your best bet is to buy a Haynes book on your car from Autozone for $20.00
It will tell you if you have stretch bolts or not in your engine.

Posted on Feb 01, 2010

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Volvo crankcase ventilation systems need to be cleaned to avoid this milky oil. Cleaning the system is rather tricky. it involves removing the intake and some special tools. The crankcase ventilation system becomes clogged up. This puts backpressure into the crankcase. The milky oil comes from excessive amount of moisture in the oil due to excess pressure. A mechanic can easily check for crankcase pressure and you can tell if this cleaing is required. My 850 has 140k, had the milky oil thought the worst case scenario. 800 bucks later mechanic had new it fixed. Car has much more power now...bonus!!

If your handy it can be done in your garage or driveway. look for crankcase ventilation or firebox parts online. I found the whole system for about 150.

Posted on Oct 27, 2010

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I have a volvo 850 estate 1996 model. This car also has a milky dipstick , unless you are using excessive amounts of coolant dont worry about it.The alloy construction of the engine allows moisture to build up in the dipstick tube as the engine cools. Ive had mine checked by my local mechanic who pressure tested the cylinders and everything is ok , in fact its still got good pressure in the cylinders with 165500 miles on the clock. Just remember to get the oil and filter changed every 5000 miles to keep the amount of moisture to a minimum in the engine, and keep an eye on your coolant level. The five cylinder unit in the 850 is one of the best engines volvo have ever produced, youll find the t-5 version in the ford focus st.

Posted on Mar 22, 2010

  • jimmy2f Oct 27, 2010

    Volvo crankcase ventilation systems need to be cleaned to avoid this milky oil. Cleaning the system is rather tricky. it involves removing the intake and some special tools. The crankcase ventilation system becomes clogged up. This puts backpressure into the crankcase. The milky oil comes from excessive amount of moisture in the oil. A mechanic can easily check for crankcase pressure and you can tell if this cleaing is required. My 850 has 140k, had the milky oil thought the worst case scenario. 800 bcks later mechanic had new it fixed. Car has much more power now...bonus!!

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Unless you already have one I would go and buy a repair manual from auto parts dealer. you can also buy on line from several dalers like RockAuto.co for about $15. Haynes publish one.

Posted on Feb 01, 2010

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