CK5
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PCV or Filters
- Thread starter PsRumors
- Start date
Dont run without one...
A PCV system robs no power,reduces blow-by,improves ring seal,avoids excess pressure in the crankcase,so seals wont leak,etc..I'd not eleminate it,its very important on a "daily driver"..it reduces sludge and condensation in the crankcase,a very important feature that aids engine longevity..
I see hundreds of "botched" PCV systems in older vehicles..either they are eliminated entirely,or the owner buys cheesy chrome valve covers with no provision for the breather ,but has a spot for a PCV valve!...the result is the valve often sucks oil right into the combustion chamber (few valve covers aftermaket have baffles under the PCV opening too,that is important!)..
Many guys remove the breather pipe that goes into the air cleaner on high milage motors with lots of blow by,to prevent the air filter from getting "oiled",or a puddle of oil accumulating in the air cleaners base..it will increase air filter life,but without the additional "draft" from the intake vaccuum,blowby instead just escapes under the hood,making a nauseating smell and oiling everything in sight!..GM could have solved this by putting the "bowtie" filter INSIDE of where the air filter sits instead of outside of it..
In days of old (pre 1963) ,engines had no PCV valve,but instead used a "road draft tube" to ventilate the crankcase..I assume marine motors use them instead of a PCV valve--they have to have SOME kind of crankcase ventilation,or they would be peuking oil everwhere!..
A PCV system robs no power,reduces blow-by,improves ring seal,avoids excess pressure in the crankcase,so seals wont leak,etc..I'd not eleminate it,its very important on a "daily driver"..it reduces sludge and condensation in the crankcase,a very important feature that aids engine longevity..
I see hundreds of "botched" PCV systems in older vehicles..either they are eliminated entirely,or the owner buys cheesy chrome valve covers with no provision for the breather ,but has a spot for a PCV valve!...the result is the valve often sucks oil right into the combustion chamber (few valve covers aftermaket have baffles under the PCV opening too,that is important!)..
Many guys remove the breather pipe that goes into the air cleaner on high milage motors with lots of blow by,to prevent the air filter from getting "oiled",or a puddle of oil accumulating in the air cleaners base..it will increase air filter life,but without the additional "draft" from the intake vaccuum,blowby instead just escapes under the hood,making a nauseating smell and oiling everything in sight!..GM could have solved this by putting the "bowtie" filter INSIDE of where the air filter sits instead of outside of it..
In days of old (pre 1963) ,engines had no PCV valve,but instead used a "road draft tube" to ventilate the crankcase..I assume marine motors use them instead of a PCV valve--they have to have SOME kind of crankcase ventilation,or they would be peuking oil everwhere!..
Not to mention, the volume of air that an air cleaner can feed OR vent is much higher than the small plug in filters, along with the fact that the air filters typically meet some kind of specs. I've not seen any of the small breathers that actually display filtration effectiveness, etc.
Could be sucking grit into your engine and you'd never know it.
Could be sucking grit into your engine and you'd never know it.
so the conclusion is you should have a pcv valve on one side going to the port on the TB or carb and a hose on the other side going to the air cleaner? I can swing this, just gotta make it easy to remove so I can add oil... correct me if I'm wrong.
That's essentially correct. PCV valve side goes to manifold vacuum, "breather" is hooked up to the aircleaner.
