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1996 850 N/A PCV - Flame trap

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

Teddy1975
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1996 850 N/A PCV - Flame trap

Post by Teddy1975 » Thu Feb 25, 2016 5:34 am

Hi guys.

While trying to remove the flame trap on my car today, I noticed a small rubber hose had collapsed and pretty much disintegrated when I tried to remove it.

When cleaning out the gunk and burnt oil I saw the nipple for that small hose was completely blocked and I've tried to clean it as best as I could using a small drill bit. Is there supposed to be hole through the nipple into the housing part 13 in the picture attached, or is it a vacuum switch?
pcv.JPG
What connects up to the flame trap via hose 19 and is it essential? It's somewhere behind the throttle body and kind of hard to get to the pipe that the hose was connected to.

Thanks,
Teddy
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rspi
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Re: 1996 850 N/A PCV - Flame trap

Post by rspi » Thu Feb 25, 2016 5:57 am

Teddy, that stuff needs to be REPLACED. It gets old and brittle, deteriorates and falls apart. Yes it is important for it to be together to work properly.
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Teddy1975
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Re: 1996 850 N/A PCV - Flame trap

Post by Teddy1975 » Thu Feb 25, 2016 6:50 am

Ack... Yeah I figured so.

Reaching out to the stealership now...

Still I wonder what the hose with number 20 connects up to.
Current: 850 2.0L N/A, 4 door 1996 manual
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Teddy1975
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Re: 1996 850 N/A PCV - Flame trap

Post by Teddy1975 » Thu Feb 25, 2016 7:15 am

$23.15 including tax for 13, 14, 15, 18 and 19 was much less than I feared.

Thanks, Robert.
Current: 850 2.0L N/A, 4 door 1996 manual
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Re: 1996 850 N/A PCV - Flame trap

Post by erikv11 » Thu Feb 25, 2016 9:03 am

Don't bother replacing 15, just throw it away, leave the housing empty inside. All that flame trap disc does is get clogged up.

You can also replace 18-19-20 with a few cm of generic rubber vacuum line.

Did you figure out where 20 connects? Vacuum tree maybe?
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gone: '96 NA 850 210k, '98 NA V70 182k

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abscate

Re: 1996 850 N/A PCV - Flame trap

Post by abscate » Thu Feb 25, 2016 9:10 am

Look for a vacuum diagram under your hood - it will show where your hoses attach

Maybe.
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Re: 1996 850 N/A PCV - Flame trap

Post by misha » Thu Feb 25, 2016 9:28 am

Number 20 on non turbo car is going at left side of intake manifold,in power steering and alternator area.
Last edited by misha on Thu Feb 25, 2016 9:50 am, edited 1 time in total.
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Teddy1975
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Re: 1996 850 N/A PCV - Flame trap

Post by Teddy1975 » Thu Feb 25, 2016 9:48 am

I haven't found more info on #20 yet... I might find out tomorrow when I've picked up the parts from the independent OE dealer.

I know people say to just throw away the flame trap, but since it really doesn't cost an arm and a leg ($8); and it's easy to replace, I'll replace/clean it when I do the yearly service anyway. I'd rather have the filter catching the bigger chunks of burnt oil before it gets into the TB and engine.
Current: 850 2.0L N/A, 4 door 1996 manual
Previous: 740 2.3L N/A, 5 door 1992 manual, and S70 2.5T 1999 manual

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Re: 1996 850 N/A PCV - Flame trap

Post by erikv11 » Thu Feb 25, 2016 9:51 am

I thought the whole point of the question was that this is not a standard setup but if there is an open nipple on the manifold then yeah, that is where 20 would connect.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 285k
'06 S60 R, 165k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

Teddy1975
Posts: 246
Joined: Wed Jan 06, 2016 11:57 am
Year and Model: 850 1996
Location: Denmark
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Teddy1975

Re: 1996 850 N/A PCV - Flame trap

Post by Teddy1975 » Thu Feb 25, 2016 12:33 pm

Well, the open end is what connects to the flame trap housing. I was just curious as to where it leads as the picture from VADIS isn't really making it clear.

I'll look at it more closely in real life tomorrow, when I have the parts. It would probably make sense to replace the PCV system completely now that I am going to mess about with part of it anyway.
Current: 850 2.0L N/A, 4 door 1996 manual
Previous: 740 2.3L N/A, 5 door 1992 manual, and S70 2.5T 1999 manual

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