CCV and PCV
05-13-2007, 11:08 PM
#1
Guest
Posts: n/a
CCV and PCV
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.
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.
05-14-2007, 08:43 PM
#2
Guest
Posts: n/a
Re: CCV and PCV
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
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
05-14-2007, 08:43 PM
#3
Guest
Posts: n/a
Re: CCV and PCV
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
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
05-14-2007, 08:43 PM
#4
Guest
Posts: n/a
Re: CCV and PCV
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
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
05-14-2007, 08:43 PM
#5
Guest
Posts: n/a
Re: CCV and PCV
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
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
05-15-2007, 09:44 AM
#6
Guest
Posts: n/a
Re: CCV and PCV
The CCV is just vacuum constant through a metered hole. The little
plastic tube plugs up easily on them then the air filter gets oil spits.
The metered hole in the rubber grommet can be cleaned with a paper clip
and carb cleaner works well on the tube.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
stilllearning wrote:
> 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.
>
plastic tube plugs up easily on them then the air filter gets oil spits.
The metered hole in the rubber grommet can be cleaned with a paper clip
and carb cleaner works well on the tube.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
stilllearning wrote:
> 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.
>
05-15-2007, 09:44 AM
#7
Guest
Posts: n/a
Re: CCV and PCV
The CCV is just vacuum constant through a metered hole. The little
plastic tube plugs up easily on them then the air filter gets oil spits.
The metered hole in the rubber grommet can be cleaned with a paper clip
and carb cleaner works well on the tube.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
stilllearning wrote:
> 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.
>
plastic tube plugs up easily on them then the air filter gets oil spits.
The metered hole in the rubber grommet can be cleaned with a paper clip
and carb cleaner works well on the tube.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
stilllearning wrote:
> 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.
>
05-15-2007, 09:44 AM
#8
Guest
Posts: n/a
Re: CCV and PCV
The CCV is just vacuum constant through a metered hole. The little
plastic tube plugs up easily on them then the air filter gets oil spits.
The metered hole in the rubber grommet can be cleaned with a paper clip
and carb cleaner works well on the tube.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
stilllearning wrote:
> 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.
>
plastic tube plugs up easily on them then the air filter gets oil spits.
The metered hole in the rubber grommet can be cleaned with a paper clip
and carb cleaner works well on the tube.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
stilllearning wrote:
> 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.
>
05-15-2007, 09:44 AM
#9
Guest
Posts: n/a
Re: CCV and PCV
The CCV is just vacuum constant through a metered hole. The little
plastic tube plugs up easily on them then the air filter gets oil spits.
The metered hole in the rubber grommet can be cleaned with a paper clip
and carb cleaner works well on the tube.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
stilllearning wrote:
> 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.
>
plastic tube plugs up easily on them then the air filter gets oil spits.
The metered hole in the rubber grommet can be cleaned with a paper clip
and carb cleaner works well on the tube.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
stilllearning wrote:
> 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.
>
05-16-2007, 03:57 PM
#10
Guest
Posts: n/a
Re: CCV and PCV
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
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