|
Re: Do I have to run a pcv
[Re: HEMIDOG 70]
#1322024
10/17/12 09:42 PM
10/17/12 09:42 PM
|
Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
|
About to go away
Joined: Sep 2007
Posts: 14,889
up yours
|
you don't "have to" but you ought to. Helps keep the engine clean, inside and out.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
|
|
|
Re: Do I have to run a pcv
[Re: Supercuda]
#1322025
10/17/12 11:48 PM
10/17/12 11:48 PM
|
Joined: Jan 2003
Posts: 75,047
U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,047
U.S.S.A.
|
Quote:
you don't "have to" but you ought to. Helps keep the engine clean, inside and out.
|
|
|
Re: Do I have to run a pcv
[Re: 79powerwagon]
#1322028
10/18/12 07:08 AM
10/18/12 07:08 AM
|
Joined: Jan 2003
Posts: 21,076
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
|
oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,076
Niles , Ohio
|
My 65 built 440 runs just 2 breathers.My kids 62 300 413 with 50K OE miles runs 2 also.Neither has any problems with pressure or oil film.Mine runs an M1 intake with Dominator and has no provisions for vacuum.When we put the headers on the 300 it eliminated the draft tube.Both have run like that for over 10 years.Rocky
Chrysler Firepower
|
|
|
Re: Do I have to run a pcv
[Re: 1BAD68]
#1322030
10/18/12 12:08 PM
10/18/12 12:08 PM
|
Joined: Jan 2003
Posts: 75,047
U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,047
U.S.S.A.
|
Quote:
Mine has a PCV on one cover and a breather on the other, is this right?
yes
|
|
|
Re: Do I have to run a pcv
[Re: therocks]
#1322031
10/18/12 12:13 PM
10/18/12 12:13 PM
|
Joined: Nov 2004
Posts: 7,274
s.w.fl
bonefish
master
|
master
Joined: Nov 2004
Posts: 7,274
s.w.fl
|
Quote:
My 65 built 440 runs just 2 breathers.My kids 62 300 413 with 50K OE miles runs 2 also.Neither has any problems with pressure or oil film.Mine runs an M1 intake with Dominator and has no provisions for vacuum.When we put the headers on the 300 it eliminated the draft tube.Both have run like that for over 10 years.Rocky
same here on my 496,if i beat on it real hard i will get a little oil seepage from the dipstick.
|
|
|
Re: Do I have to run a pcv
[Re: bonefish]
#1322032
10/18/12 12:20 PM
10/18/12 12:20 PM
|
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
|
Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
|
Quote:
Quote:
My 65 built 440 runs just 2 breathers.My kids 62 300 413 with 50K OE miles runs 2 also.Neither has any problems with pressure or oil film.Mine runs an M1 intake with Dominator and has no provisions for vacuum.When we put the headers on the 300 it eliminated the draft tube.Both have run like that for over 10 years.Rocky
same here on my 496,if i beat on it real hard i will get a little oil seepage from the dipstick.
Without a PVC valve, you are putting more pressure on the seals. Do you want oil leaks? Why not run one? Because you don't understand what they do? 
|
|
|
Re: Do I have to run a pcv
[Re: az426john]
#1322035
10/18/12 02:30 PM
10/18/12 02:30 PM
|
Joined: Jan 2003
Posts: 75,047
U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,047
U.S.S.A.
|
Quote:
Back in the day, before there were PCV valves, there were road draft tubes to relieve pressure build up. These were cut on an angle and when you were driving created a low pressure stream that would remove the vapors and the built up pressure.
Similar to evac tubes in headers ?
Where would one have been on a big block , or smallblock for that matter , Chrysler ? I remember seeing one on the 56 Chevy I owned with a 6 banger ...
I can see not using a PCV on a race engine , street engine I would think it wouldn't really hurt ...
|
|
|
Re: Do I have to run a pcv
[Re: JohnRR]
#1322036
10/18/12 03:49 PM
10/18/12 03:49 PM
|
Joined: Jan 2003
Posts: 21,076
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
|
oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,076
Niles , Ohio
|
BBs were on the pass side valve cover.I had quite a few.My kids was in the same place.He runs 2 K&N screen breathers and I run 2 Moroso breathers.Neither leaks.His 300 probally got more street miles in a year than most cars here get in 10.My 440 is pretty much a race motor driven on the street.Ive driven it quite a bit and no problems.Besides Im not goimg to drill a new intake just to install a PCV.Its sees 6 to 7 K revs regularly.Rocky
Chrysler Firepower
|
|
|
Re: Do I have to run a pcv
[Re: dogdays]
#1322041
10/18/12 10:51 PM
10/18/12 10:51 PM
|
Joined: Aug 2003
Posts: 43,228
Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,228
Bend,OR USA
|
Quote:
Generally the PCV is closed at idle, the high vacuum sucks it closed. Then at some point as vacuum drops, it opens up.
Now I'm not saying that there's no leakage, but if the PCV is stuck open it's hard to get a car to idle.
And yes, technically the oil vapors lower the octane rating of the mixture. It seems however, that the benefit of running a little vacuum or at least no positive pressure in the crankcase has more benefit.
My Poly 318 was leaking oil from every gasket. I found the hose to the PCV valve was collapsed internally. Replacing the hose cured 90% of the oil leaks.
R.
You have the PCV operation theory backwards, it is open at high vacume and the spring inside closes it at WOT or when the motor is not running, if it is hook up correctly    If you hook it up backwards it will work backwards  
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
|
|
I also run two breather caps, one in each cover. The PCV helps suck any condensation out of the motor once it gets up to temps as well as sucking any blowby fumes into the intake manifold, much better to burn them rascals up than to let them sit in the motor and cause acids mixing the water and oil together 
