One works and the other doesn't. Convert to PCV:
http://home.sprynet.com/~dale02/aircl.htm#pcv It's should have been done on
recall, as the solenoid failed and the orifice clogged, and blew oil into
the air filter box.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/


"stilllearning" <shahswim@yahoo.com> wrote in message
news:1179112126.837803.263870@e51g2000hsg.googlegr oups.com...
> What is the difference between Closed Crankshaft Ventilation (on Jeep
> Grand Cherokees 4.0L) and Positive Crankshaft Ventilation (On 4.7L)?
> Is CCV simply a vacuum based system sucking out Crankshaft gases,
> while PCV has a valve to ensure no reverse vacuums due to backfires?
> What are the pros and cons of both?
>
> If these questions are not meant for this groups, please suggest where
> I can ask such questions. I am a Jeep Grand Cherokee 2004 limited 4.0L
> owner learning the engine internals - just for kicks and maybe to do
> self-maintenance.
>
> Thank you.
>



--
Posted via a free Usenet account from http://www.teranews.com

 

One works and the other doesn't. Convert to PCV:
http://home.sprynet.com/~dale02/aircl.htm#pcv It's should have been done on
recall, as the solenoid failed and the orifice clogged, and blew oil into
the air filter box.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/


"stilllearning" <shahswim@yahoo.com> wrote in message
news:1179112126.837803.263870@e51g2000hsg.googlegr oups.com...
> What is the difference between Closed Crankshaft Ventilation (on Jeep
> Grand Cherokees 4.0L) and Positive Crankshaft Ventilation (On 4.7L)?
> Is CCV simply a vacuum based system sucking out Crankshaft gases,
> while PCV has a valve to ensure no reverse vacuums due to backfires?
> What are the pros and cons of both?
>
> If these questions are not meant for this groups, please suggest where
> I can ask such questions. I am a Jeep Grand Cherokee 2004 limited 4.0L
> owner learning the engine internals - just for kicks and maybe to do
> self-maintenance.
>
> Thank you.
>



--
Posted via a free Usenet account from http://www.teranews.com

 

One works and the other doesn't. Convert to PCV:
http://home.sprynet.com/~dale02/aircl.htm#pcv It's should have been done on
recall, as the solenoid failed and the orifice clogged, and blew oil into
the air filter box.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/


"stilllearning" <shahswim@yahoo.com> wrote in message
news:1179112126.837803.263870@e51g2000hsg.googlegr oups.com...
> What is the difference between Closed Crankshaft Ventilation (on Jeep
> Grand Cherokees 4.0L) and Positive Crankshaft Ventilation (On 4.7L)?
> Is CCV simply a vacuum based system sucking out Crankshaft gases,
> while PCV has a valve to ensure no reverse vacuums due to backfires?
> What are the pros and cons of both?
>
> If these questions are not meant for this groups, please suggest where
> I can ask such questions. I am a Jeep Grand Cherokee 2004 limited 4.0L
> owner learning the engine internals - just for kicks and maybe to do
> self-maintenance.
>
> Thank you.
>



--
Posted via a free Usenet account from http://www.teranews.com