Yes they are worth it as they basicly stop ur car breathing oil fumes!
im just going to purchase a cheapy one from ebay as its not filtering just stopping oil getting out ^^
Don't go to halfords though cheapest one there £9 about a fiver on eBay!
Well i just thought that the original system was designed to re-use the fumes, thus reducing the exhaust emisions, as not all the fumes went out the exhaust, like they would do if i put on an oil breather. But i could be wrong....
EGR? Am I being stupid? Emmisions can't get into the rocker cover anyway they go out the exhaust valve. anyway if anything it will reduce emmisions cause it is venting in the engine bay.
It stops the air filter clogging up with Oil through the breather pipes by going in it's own filter. Some say the oil helps lubricate the carb, but i've got some cheap ebay one on mine anyway. My other one fell off on the way to JAE lol
I've never bought one myself, never had the need to. I suppose they are a good idea in a certain way, catching oil that has been moved out of the rocker cover and letting out pressure.
Which is why Nissan put the little Mesh Filter inside the Air-pan.
This does the same job as the Breather Filter which also has to be removed and cleaned in petrol when dirty.
As far as i can see all that these Breather Filters do is keep the large Filter in the Air-pan cleaner for longer and they also look nice....
(so i dont have to go out in the cold to measure) :laugh:
right, after hunting round for a ruler, i went out and measured the rubber tube bit that connects the air pan to the place where the oil breathr will go. The measure ments are:
the oil breether that connects the air pan to the rocker cover draws fresh air INTO the rocker cover from the airpan (via the white filter that stops dust or grit getting into your oil)
the white filters (and the air filter too) can get oiled up if the engine oil and oil filter doesnt (or hasnt in the past) get propper regular changes...note that most of the oil vapor fouling is done after the drive when the engine is stopped...vapour then exits backwards through the PCV filer (white felt thing)