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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

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erikv11
Posts: 9585
Joined: Sat Jul 25, 2009 2:03 pm
Year and Model: 850, S/V70, 06 S60R
Location: Iowa
Has thanked: 90 times
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erikv11

Re: 1996 850 N/A PCV - Flame trap

Post by erikv11 » Thu Feb 25, 2016 1:38 pm

You may be interested to know that by 1998, Volvo eliminated the flame trap disc, even though it is the exact same engine and PCV piping.
'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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Denmark
Teddy1975

Re: 1996 850 N/A PCV - Flame trap

Post by Teddy1975 » Fri Feb 26, 2016 1:21 pm

And I just found out why they eliminated the flame trap, from this service notice in VADIS... (This program have a world of information, just have to learn how to use it properly):
Crankcase ventilation, service

Note! Winter driving and short journeys can cause build-ups of ice in the flame trap. In severe cases, this may damage the crankshaft seals. Therefore the system must be cleaned thoroughly.

Remove the cover over the throttle pulley
Release the hose clamp for the inlet hose on the air cleaner (ACL) housing.
Disconnect the hose from the air cleaner (ACL) housing. Bend the hose forward slightly.
Remove the oil filler cap

Clean the crankcase ventilation and/or remove the flame trap
Remove the flame trap by twisting it approximately 15 mm to the left (bayonet socket).
Clean the flame trap housing (2) after the flame trap has been removed. Blow the hoses clean 1&3. Clean the inputs and outputs for the multi-nipple (4). (does not apply to 1995 models)
Note! The nipple (3) for the small hose has a 2.5 mm diameter calibrated hole. (Use a drill bit for cleaning)
Caution! Do not disconnect the hoses from the flame trap casing. Altering the hose positioning can affect the throttle function.

Reinstall the components
Reinstall all the components except for the flame trap.
So since I live in a country where there's at least a chance of snow 3 months every year, I'll not install the flame trap and just get rid of the one I bought.

I thought it was simply because people thought it was not necessary to have the flame trap that you guys said to just not install it. Now you can tell others exactly why they should rip out the trap first thing they see it installed in their car.

And a slap on my wrist for not listening to you sooner.
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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misha
Posts: 4185
Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
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misha

Re: 1996 850 N/A PCV - Flame trap

Post by misha » Fri Feb 26, 2016 2:10 pm

Teddy1975 wrote:...I'll not install the flame trap and just get rid of the one I bought.

I thought it was simply because people thought it was not necessary to have the flame trap that you guys said to just not install it. Now you can tell others exactly why they should rip out the trap first thing they see it installed in their car...
Others already know. :wink:
It's allready explained over Volvospeed board a long,long time ago.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

User avatar
erikv11
Posts: 9585
Joined: Sat Jul 25, 2009 2:03 pm
Year and Model: 850, S/V70, 06 S60R
Location: Iowa
Has thanked: 90 times
Been thanked: 261 times
United States of America
erikv11

Re: 1996 850 N/A PCV - Flame trap

Post by erikv11 » Fri Feb 26, 2016 3:51 pm

Get rid of it because it gets clogged up. Oil, ice, whatever ... yes a clogged flame trap can cause crankcase pressure and blow seals.

(This site have a world of information, just have to learn how to use it properly.)
'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

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