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| tazmarkuk Member Since: 24 Jan 2012 Location: Birmingham Posts: 134   
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The PCV (Positive Crankcase Ventilation) system is designed to regulate and remove fumes from the engine crankcase, and to alleviate crankcase pressure which could cause oil leaks or seal damage. It’s a way for gases to escape in a controlled manner from the crankcase of an internal combustion engine.
During normal operation of an internal combustion engine, there’s a compressed air and fuel mixture inside the combustion chamber that is ignited and as a result, forces the piston down. A small amount of that ignited mixture leaks past the piston rings and ends up in the crankcase. This leakage is often referred to as “blow-by” (leakage past the piston rings), as well as oil mist. Some of the oil mist and other products settle along the engine intake and over time form a “gunk.” This potentially could be the main cause, all engines will have different amounts of oil in the intake, so some MAF will last longer than others. |
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29th Mar 2015 6:40am |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610  
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Fitting a Provent 200 (or another form/brand of 'catch can') will alleviate the symptoms described above and some have a pressure release system built in too.
 If you go through life with your head in the sand....all people will see is an ar5e!!
Treat every day as if it is your last....one day you will be right!! |
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29th Mar 2015 8:57am |
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| Cupboard Member Since: 21 Mar 2014 Location: Suffolk Posts: 2971 
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There was a long post from one of the tuners (BAS I think) here which showed similar results. Performance air filters rarely gave any benefit and in some cases were worse than standard. Edit: found it: http://www.defender2.net/forum/topic21125.html "Filter tests, time to stop buying S**T me thinks."
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29th Mar 2015 9:44am |
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