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Silly Flame Trap 200 1989

posted by  AzurE on  Sun Aug 31 10:08 CST 2003
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a circuit from the crankcase to the valve cover already exists, otherwise the oil from the cam could not drain back to the pan. i am just venting the engine from up top where there is less windage. the flame trap does not prevent a backfire from blowing seals....a pcv valve does, and it stops the flame also.
older cars typically had a breather off the side of the block vented to down to the ground, when the blow by got bad, they would dribble....volvo took that breather and connected it to manifold vacumm thru a "flame trap" while the rest of the automotive world sucks the vapors from up top via a pcv.






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