Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

Flame trap dripping oil...messy!

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Old May 19, 2012 | 06:11 PM
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Default Flame trap dripping oil...messy!

1995 850NA, 200K miles . There is a tremendous amount of oil leaking from the flame trap connection. The basket filter inside is clear, and I put a new O-ring. Even if there was a good seal, why is so much oil being passed through this tube into the intake? The whole area below the flame trap is saturated with oil, and there are nice spots of oil on my driveway!
 
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Old May 19, 2012 | 08:11 PM
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Probably because your oil trap behind the intake is clogged.
 
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Old May 20, 2012 | 07:08 PM
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Either the oil trap or possibly the passage into the block is plugged with crap ?? A lot of people report having to poke or pick out crap from the passage in the block when they replace that flame trap. Maybe the trap is OK but it can't drain the oil back into the oil pan because the passage is blocked.
 
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Old May 21, 2012 | 10:34 PM
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Same responses he got on VS and SS... everyone is still waiting for an update
 
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Old May 22, 2012 | 04:03 PM
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Originally Posted by MattyXXL
Same responses he got on VS and SS... everyone is still waiting for an update
Got to wait for a nice day to start exploring. I have a new intake manifold gasket, in case I want to dig really deeply.
 
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Old Apr 4, 2024 | 12:00 PM
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Default Same issue here.

Originally Posted by AlanS
Got to wait for a nice day to start exploring. I have a new intake manifold gasket, in case I want to dig really deeply.
The same here. I've changed the flame trap and it was ok for a short period of time, then it started leaking again. I've never changed the pcv. Did you ever found out if the problem was really from the pcv?
Regards
 
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Old Apr 4, 2024 | 12:41 PM
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keeping the PCV in good shape on an 850 includes replacing the hoses, the oil separator and cleaning out the ports in the block. Some techs will recommend dropping the oil pan and clean up the ports and the bottom end that way as well. As far as the hoses and oil separator, IPD and FCP sell a kit that includes all the major components (I think its in the $200 range). To do the job you'l need to lift the intake manifold so check Youtube for online how to vids (I'm betting there's a RobertDIY vid which is a good way to start gaining some insights into maintaining the PCV).
 
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Old Apr 9, 2024 | 06:12 AM
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I always drop the pan. Sometimes you'll find them clean and sometimes there's a lot of crud down in there.
 
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