Question about 1994 Volvo 850

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My 1994 volvo 850 is leaking oil from the filler cap...why?

Leaking oil from the oil filler cap...

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2 Answers

Clogged up PCV System ---maybe

Too much crank case pressure

Posted on Nov 29, 2012

  • mikehrabb
    mikehrabb Nov 30, 2012

    thank you to all whom have replied and given advice. is my 1st volvo and am learning a new vehicle now,previously drove Toyota Landcrusier s


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Hi guys, I'm new here, and am having this same problem with 1994 Volvo 850 5 cyl 20 valve non-turbo engine. According to everything I can get my hands on, this engine doesn't have a PCV system... so... now what?

Posted on Apr 06, 2013


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Posted on Jan 02, 2017

  • 79865 Answers

SOURCE: oil leak

yes this is caused by excessive crankcase pressure, check the PCV system for proper function.

Posted on Mar 24, 2009

  • 298 Answers

SOURCE: when the engine is running on my volvo s40

A bit of splash is normal from the slight backpressure created when the pistons go down in any engine, but might also be due to clogged PCV valve. Put the cap back on and pull the dipstick and see if you hear constant hsssssss from there, or if the oil splashing abates from the Fill hole.

As a rule, you are not supposed to open that with the engine running ;-) Very messy on a nice Volvo

My money is on the PCV valve (Positive Crankcase Ventilator ($3.00-20.00)

Posted on Mar 26, 2009

  • 714 Answers

SOURCE: oil coming out of oil filler cap when driving my

This is a serious problem. with a fairly easy fix.

First ensure that the engine is not out of oil.

You are looking for a Positive crank case ventilation valve, Seek professional help at your parts store, they should be more than happy to point it out the valve for you..

Recommend you replace it and the hose attached.

Unless you have a serious engine malfunction this will clear the oil coming out of the Dip stick.

These engines do tend to produce a lot of blow by but we all agree with your needed course of action to replace the valve.

David .

Posted on Feb 14, 2010

  • 23 Answers

SOURCE: volvo 960 estate blowing oil from the oil filler

Your PCV / Oil trap is likely clogged. I have had some luck running Mobile 1 Synthetic oil and half a can of seafoam in the engine oil to clean things up but it is likely that you will have to replace the pcv system.

Posted on Mar 16, 2010

  • 972 Answers

SOURCE: I have just got a 1994 volvo 850, how do I undo

switch on door panel

Posted on Mar 19, 2010

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1 Answer

1996 volvo 850 pcv valve location

These have a PCV oil trap, not a valve. It is located under the intake manifold. The hoses run from under the spark plug wire cover all the way down to the oil trap and over to the throttle body. Over time the PCV oil trap becomes brittle and clogged. You will need to buy a new PCV kit for around $150 and replace it. Before you do, you must clean out the engine block where it attaches at its lowest point on the engine. I used sea foam, compressed air, and a coat hanger. I did an oil change at the same time so I could drain the sea foam out of the oil pan. Make sure you clean it out good because it will spray oil out of the dipstick and oil filler cap even after replacing the PCV components.

Apr 13, 2012 | 1995 Volvo 850

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Some how there is oil all over the top of the engine, the car still runing

your car engine might be weak and its blowing to see the blow open the cap where you put in the oil and start mind you do not stand in front of the cap whole if it is throughing the oil mist out the engine is weak

Feb 22, 2011 | 1994 Volvo 850

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How do I know if my 1994 volvo 850 a/c uses R12 or R134a

by the filler valves and a 1994 vehicle will have R134 also the rad in the front of the vehicle is full size

Jun 21, 2010 | 1994 Volvo 850

5 Answers

Oil coming out of engine oil filler cap even though i have changed oil filler cap

The engine breather pipe seems to be blocked.
It may also damage the oil seals.

Oct 27, 2009 | 1992 Volvo 940

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1997 VOLVO 850

check for compression on all cylinders if you ran the engine hot to long you may have blown the head gasket another way you would know is by filling up the radiator with water and then with the cap off turn the starter like if your going to start the engine if you see the water jump out of radiator then you have a blown gasket another way is by checking the oil if it looks like coffee with milk then the gasket is blown, I hope this information is useful good luck

Jul 22, 2009 | 1994 Volvo 850

1 Answer

Oil blowing out of the fill cap

u need to verify the Positive Crankcase Ventilation system is functional, if not u have this crankcase pressure problem.

Feb 09, 2009 | 1994 Volvo 850

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The oil is running out from the oil filler cap

Make sure the pcv valve is working correctly and allowing the engine to breath

Nov 20, 2008 | 1994 Volvo 850

3 Answers

Oil leaks look at all your hoses i changed all mine for 4mm silicon hose and found some split /blocked that fixed the back pressure problem dont drill your cap that aint going to fix it it just lets oil run every where .

Aug 01, 2008 | 1996 Volvo 850

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