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94 850 Turbo crankcase pressure

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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pr0t0n29
Posts: 7
Joined: 15 August 2014
Year and Model: 94 850 Turbo Wagon
Location: United States

94 850 Turbo crankcase pressure

Post by pr0t0n29 »

I need ideas on what to try, there is oil everywhere.

So far as I can tell, oil is coming out the filler cap, the dipstick, the cam cover, and it's hard to tell if it's coming from anywhere else since there is oil coating every part of the bottom of the car. I replaced the PCV system, I have vacuum at the PTC, but there is still a constant flow of gasses flowing out of the dipstick when I pull it, and out of the oil filler cap.

Now for the fun part: When I got the car it had a bad head gasket and very little coolant. I changed the head gasket and got a remanufactured head (Old one was warped). It blew some smoke out the back, but after putting in a ring seal goop of some kind that has stopped. Compression is at 150 on all five. It runs well besides the oil shower. I've put 2500 miles on it since the head gasket job.

At this point I'm not sure what else to check. Would pulling the oil pan let me see if there is some kind of blockage keeping the PCV system from working? I need some ideas.

Ozark Lee
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Post by Ozark Lee »

Pulling the sump would let you inspect the duct from the oil trap that always clogs up. If it gets real clogged up it is very difficult to clean it from the nipple on the block where the short elbow next to the oil trap goes. You can get it good and clean from the bottom.

It will also provide an opportunity to change the sump O rings which are essentially a maintenance item. You need to use an anaerobic sealer like what you would have used on your cam cover to seal it back up.

...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

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