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Old 10-10-2012, 11:17 AM   #1
triniscoob
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Default Fresh Built hybrid smoking thru oil FILLER tube

Just rebuilt a stock block ej257 engine with standard size weisco Forged pistons and rings.
0(ZERO) miles on engine, just started up, engine idles perfectly but low and behold when dipstick is removed theres Excessive pressure and some light SMOKE coming from it.
BEsides a comporession check what else can i check into?
Can an out of round cylinder be the main concern?

URGENT need needed!
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Last edited by triniscoob; 10-11-2012 at 02:08 PM.
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Old 10-10-2012, 11:21 AM   #2
the suicidal eggroll
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The rings haven't seated yet, quit idling and get out there and seat those rings. Until the rings are seated, your compression is going to be crap, and you're going to get blowby.

That said, did you measure your P/W clearances and ring gaps?
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Old 10-10-2012, 11:43 AM   #3
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Light coming from the dipstick? What? With the rings set or not you shouldn't see light from combustion if that's what hes refering too.
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Old 10-10-2012, 11:45 AM   #4
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I missed the part about light...that's definitely odd.
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Old 10-10-2012, 11:49 AM   #5
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My bad- LIGHT SMOKE coming from the dipstick along with the pressure
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Old 10-10-2012, 12:01 PM   #6
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Oh thank god!!! *EDIT* That would be alarming to see light. But ya Eggroll is right your compression is bad cause the rings havent set yet.
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Old 10-10-2012, 12:12 PM   #7
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but doesnt the smoke coming out of the dipstick a cause for concern? before i renuilt i pulled it apart due to that same smoke, but then i had bad idle , loss of power and excessive oil consumption, when engine was torn down it was found that the oil control RING on the piston had collapsed!
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Old 10-10-2012, 12:41 PM   #8
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It could be a serious problem however I say it's the rings not seated. If you trust the assembly then drive that thing! Sounds like your worried about it.
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Old 10-10-2012, 12:56 PM   #9
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Before rings set there will be blowby... Give it some boost, push those rings into the wall surface. The compression should pickup after the rings have set. If you still see the same issues after a few hundred mi of boost and high compression braking then you've got something to be concerned about.
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Old 10-11-2012, 02:10 PM   #10
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Ok , i finally collected my car today, and to my dismay found out that the excessive pressure is coming out from the OIL filler tube.
NO pressure from the DIPstick tube
No pressure coming from the centre Vent that usually connects to both vents.
Now what my mech did was to disconnect the centre Vent off the block and leave it open, and the PCV valve line on one side(passanger side) is also venting open , he said that when you connect all the the lines together that the pressure will want ot blow out the OIL dipstick .

Any more thoughts?
Yes i plan on driving tha car( breaking it in) and see what happens.
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Old 10-11-2012, 02:24 PM   #11
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The dipstick tube, oil fill tube, and ALL crankcase vents go to the exact same place...the crankcase. It's not possible for air to vent out of the oil fill tube and none of the others, because they all go to the same place.

Your mechanic doesn't seem to know what he's doing. The PCV system already ventilates itself through the crankcase and head breathers into the intake system. That's what the V in PCV stands for, ventilation. Connecting the system up properly does not pressurize the crankcase, it allows it to vent through the PROPER means. Leaving those vents open will introduce an unmetered air leak through the line between the manifold and the PCV.
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Old 10-11-2012, 03:39 PM   #12
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can you help me ? im simply looking for the best possible way to reconnect my PCV system taking into consideration im using a USDM Ej257 with JDM ej207 heads.
I have a Grimmspeed AOS that i also would like to use.
Anyoen can sketch me up a simple diagram or where ot route which of the 2 valves per cover to? and what shold i do with the centre PCv?
Should i condemn the pcv to turbo inlet connection?
Im reading and reading and searching for answers here on nasioc but there seems to be quite a bit of debate on which is the better way to go.
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Old 10-12-2012, 08:30 AM   #13
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did a quick sketch
heres my current setup as of this morning

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Old 12-17-2012, 09:38 PM   #14
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just asking here but if i have left ONE set of the crank case vents BReathing to Atmosphere will it cause a vacuum issue an dcause the car to IDLE BADLY and stumble?
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Old 12-17-2012, 10:09 PM   #15
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Originally Posted by triniscoob View Post
just asking here but if i have left ONE set of the crank case vents BReathing to Atmosphere will it cause a vacuum issue an dcause the car to IDLE BADLY and stumble?
You need to clarify, if you have anything on the intake side open to atmosphere then yes. But if you mean that you have just the crankcase open to the air then no, especially with blowby it is impossible for the crankcase to be on vacuum as far as I know ie: the engine isn't sucking unmetered air from the crankcase (will always take the path of least resistance which will be through the valve).

You should really try to get that hooked up, in doing so you help evacuate the crankcase by putting a slight suction on the CC tube from the intake.
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Old 12-18-2012, 08:47 AM   #16
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If your smoking out of the filler, or dipstick then you have some rings lined up or not round cylinders.... Either way you will be very lucky if the issue goes away... Adding back in your PCV in the back might help it a bit as it sucks out the smoke from that port in the back... but if you see steady smoke coming out then i would assume the rings lined up on one cylinder. Do a leakdown and you will find out which one it is... seen it a few times on blocks that didnt use a torqueplate... blowing dipstick out under boost will just be the beginning of the fun...
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Old 12-18-2012, 12:14 PM   #17
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Quote:
Originally Posted by the suicidal eggroll View Post
The dipstick tube, oil fill tube, and ALL crankcase vents go to the exact same place...the crankcase. It's not possible for air to vent out of the oil fill tube and none of the others, because they all go to the same place.

Your mechanic doesn't seem to know what he's doing. The PCV system already ventilates itself through the crankcase and head breathers into the intake system. That's what the V in PCV stands for, ventilation. Connecting the system up properly does not pressurize the crankcase, it allows it to vent through the PROPER means. Leaving those vents open will introduce an unmetered air leak through the line between the manifold and the PCV.
Hmmm....I always thought the "V" was "Valve" as in "it's a check valve". Yes, part of what it wants to do is pull a lower pressure in the crankcase so blowby & oil vapors get burned in the engine (emissions stuff) & reduce some pumping losses of the moving pistons.

OP.......

Depending on your intake system, you may be admitting UNMETERED air into the intake (since the PCV system is open to the outside world) which could account for a crappy running engine.

Is it possible on your car to install the PCV backwards? This would allow you to PRESSURIZE the crankcase!
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Old 12-18-2012, 01:03 PM   #18
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Originally Posted by J-hop View Post
But if you mean that you have just the crankcase open to the air then no, especially with blowby it is impossible for the crankcase to be on vacuum as far as I know ie: the engine isn't sucking unmetered air from the crankcase (will always take the path of least resistance which will be through the valve).

You should really try to get that hooked up, in doing so you help evacuate the crankcase by putting a slight suction on the CC tube from the intake.
Yes it is, if the crankcase is open to atmosphere.

That "path of least resistance" BS needs to die in a fire. Nothing ONLY takes the "path of least resistance", sure the MAJORITY will, but SOME will always come through ANY available path. If air only flowed through the path of least resistance, it would ONLY come through the throttle body and vacuum leaks at the manifold would be nonexistant. You could pull all of the hoses straight off of the manifold and no air would be drawn in through the open ports because "the path of least resistance" would dictate that all air still comes through the throttle body. Obviously that's a crock of ****.

Air will flow through ALL available paths, and the amount of air flowing through each path will be inversely proportional to the resistance along that path.

What this means is that when the manifold is in vacuum, it WILL be drawing air from the crankcase through the PCV valve (and not an insignificant amount either). If the air in the crankcase is coming from the atmosphere, then that air is unmetered and it will screw up your fueling. Ask anybody who's switched to blow through and not blocked off the manifold->PCV line...
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Old 12-18-2012, 01:13 PM   #19
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Quote:
Originally Posted by Charlie-III View Post
Hmmm....I always thought the "V" was "Valve" as in "it's a check valve". Yes, part of what it wants to do is pull a lower pressure in the crankcase so blowby & oil vapors get burned in the engine (emissions stuff) & reduce some pumping losses of the moving pistons.
http://en.wikipedia.org/wiki/Crankca...tion_.28PCV.29

The valve itself is only one part of the PCV system
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Old 12-18-2012, 06:09 PM   #20
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Originally Posted by the suicidal eggroll View Post
Yes it is, if the crankcase is open to atmosphere.

That "path of least resistance" BS needs to die in a fire. Nothing ONLY takes the "path of least resistance", sure the MAJORITY will, but SOME will always come through ANY available path. If air only flowed through the path of least resistance, it would ONLY come through the throttle body and vacuum leaks at the manifold would be nonexistant. You could pull all of the hoses straight off of the manifold and no air would be drawn in through the open ports because "the path of least resistance" would dictate that all air still comes through the throttle body. Obviously that's a crock of ****.

Air will flow through ALL available paths, and the amount of air flowing through each path will be inversely proportional to the resistance along that path.

What this means is that when the manifold is in vacuum, it WILL be drawing air from the crankcase through the PCV valve (and not an insignificant amount either). If the air in the crankcase is coming from the atmosphere, then that air is unmetered and it will screw up your fueling. Ask anybody who's switched to blow through and not blocked off the manifold->PCV line...
I never understood why people have a hard time comprehending this. I mean, it isn't that difficult of a concept...
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Old 12-19-2012, 03:25 PM   #21
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Ok fine I didn't explain myself correctly. I may have missunderstood the OP as well. I figured he had the manifold plugged and the crankcase open to atm. Which is why I stated he wouldn't pull in unmetered air because the piston isn't going to be sucking air in from the crankcase it will be pullin from the intake, which is the preferential path because it would be quite difficult to pull from the crankcase unless you have massive ring gap, that is why I made the path of least resistance comment.

Kind of like if you were to put two straws in your mouth but put resistance on one straw you are going to preferentially pull from the straw with least resistance.

Last edited by J-hop; 12-19-2012 at 06:53 PM.
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