Volvo AWD 850 Forum

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PCV or FLAME GUARD 850

posted by  someone claiming to be 97 850 on  Mon Jul 28 13:40 CST 2003 [RELATED]

HI, WHERE IS IT ON A 1997 850 WITH A LOW PRESSURE TURBO? I'M LOOKING BUT I JUST CAN'T SEEM TO FIND IT. THANKS FOR ALL REPLIES.








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PCV or FLAME GUARD 850

posted by  someone claiming to be Sam on  Wed Jul 30 03:51 CST 2003 [RELATED]

You surely have a pcv system to vent blow by, but you do not have a flame trap. On a turbo, the blow by gets vented back into the turbo, extinguishing any flame that might be present. Thus, no need for the flame trap that is required for N/A cars.

Sam







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PCV or FLAME GUARD 850

posted by  Don in Maryland on  Mon Jul 28 14:27 CST 2003
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last visit: Tue Jun 2 11:27 CST 2009
[RELATED]

I don't believe that any 850 volvo turbo has a flame guard/pcv valve. There is positive pressure in the air intake when under boost from the turbo. The flame guard on a non-turbo is just prior to the throttle body, in the air supply hose.

The gases from the crankcase in a turbo are drawn in just prior to the turbo where there is always vacuum and never positive pressure.

--
Don 93 & 95 854 GLT, 95 855T







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