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Oil in the Mass Air Flow sensor

50K views 32 replies 22 participants last post by  cookie311  
When i used to mess around with cars in my younger days if the oil breather to the afm was pumping too much back into the system there were two routes to take.

1) blank the hole in the air intake pipe, then fit a small filter (k&n sell them) that fits into the breather pipe, this was the cheapest option. This allowed the breather to "breathe" but it breathes to atmosphere. The problem with this is the oil vapour is free to spray all over the bay.

2) if you wanted your bay to stay clean, blank the pipe as above, then fit an oil catch tank onto the breather pipe, pref one with a level on so you can see when its full. This, suprisingly enough, catches any oil and has a vent to allow excess pressure to escape to atmosphere. Tanks generally cost around ÂŁ60-100, but this totaly stops oil being recirculated into the air intake, saving time and money on cleaning the afm all the time.

Just thought id add this incase anyone was getting sick.