Super VXer
\Originally Posted by tom4bren
Just my opinion, but I think you're entering into over-engineering territory with that one by considering pressure to be the same as flow. As long as pressure has any point of escape, it will be evenly distributed throughout the entire system of passages.
Super VXer
Mebbe ... mebbe
What is the current mechanism for pressure leveling between the two valve covers though ... through the block? Don't think so. The PCV is designed to relieve pressure that is accidentally placed on the valve covers by the block. Valve covers aren't designed to manage pressure, they are usually just light stamped steel.
A crossover tube may be overkill but with our oil consumption problems, it's an easy solution that may have large benefits. I'm just proposing that I'll be the guinea pig to try it out. The trial will just be to get an aftermarket oil fill cap, drill a hole through it, run a hose from there over to the catch can, drive it for a month or 2 to see if it helps ... easy peezy!
I'm already running an oil catch can on the Amigo & cut the oil consumption in half. Next I'll try the crossover tube to see what that does. Replacement engines just don't seem to be the bestest solution to our oil consumption problem ... there's gotta be a better fix.
[SIGPIC][/SIGPIC]
Put a smiley after you say that Bub.
Super VXer
And do you not think there was any contradiction in what you just said? Besides, PCV DOES stand for Positive Crankcase Ventilation.
But since you brought it up, by what mechanism are YOU then suggesting that any crankcase pressure gets up to the valve covers? Are you suggesting that there is only a passage/tube that goes from the crankcase up to the drivers' side head/valve cover to get to the stock PCV valve? If so, what good would such a crossover tube to the passenger side valve cover do then, since in your scenario, there would then be no excess crankcase pressure there to equalize anyway?
Like I said, I was just offering my opinion. Knock yourself out.
Super VXer
Nope ... I did not contradict meself (that would be counter productive to my current record of never being wrong). The PCV valve is there to prevent PCV, which is why many laymen actually mistakenly refer to the little plastic thinggy on your left hand valve cover as the Pressure Control Valve (PCV). The bottom line is that you should NOT have pressure inside of your valve covers - they just can't handle it. Valve covers have a direct line to your oil pan so any pressure is bled off by ... oil leaks - at the valve covers, or the oil pan, I've even seen it shoot out of the dipstick tube.
Where does that pressure come from you ask? Blow by from the valves (probably blow by from the rings too but that's food for a different discussion).
The only way that the right valve cover pressure can be relieved through the PCV is for the vapors to flow through the oil pan & back up the other side to the left valve cover to exit through the PCV. That's just asking for more vapor borne oil to get burned off through the combustion chamber & IIRC, that's what we're trying to avoid.
It sounds like we aren't going to ever reach the point of agreeing to agree so until I try out my cross over idea, lets just agree to disagree. It's gonna be SCHWWEEEETT to prove you wrong though.
Super VXer
Heh, you just made another contradiction. The PCV is there to PROMOTE positive crankcase ventilation. :P
Mebbe, but no one HERE mistakenly referred to it as a Pressure Control Valve.
You see, you just contradicted yourself AGAIN with regards to what you said in your earlier post.
What was your mechanism of delivery by the way? I didn't see an answer to that question.
Which is what Positive Crankcase Ventilation systems were created to address in the first place. Excess pressure wasn't MEANT to be bled off by oil leaks at the various engine gaskets (oil pan, valve cover, or dipstick tube), that's just where it ended up being bled off sometimes because the gaskets and/or dipstick had been blown out by the excess crankcase pressure.
Yeah...I didn't ask, because I already understood that the pressure in question DOES come from blowby past the rings and not the valves (intake and exhaust) as you just suggested.
Again though, we're talking about vapors that are going to be pressurized equally throughout the entire system of passages (in the engine block and heads) in the PCV system. You're equating that principle with basic flow and it's just not the same.
Hey, I'd be the first to agree that we aren't going to agree about how a PCV system works based on your apparent current understanding of such a system...any more than I'd agree with anyone at the moment who might tell me that once you determine your crossover idea isn't in fact necessary, you'll be back on here SCHWWEEEETTLY admitting that you were wrong.It sounds like we aren't going to ever reach the point of agreeing to agree so until I try out my cross over idea, lets just agree to disagree. It's gonna be SCHWWEEEETT to prove you wrong though.
Super VXer
What are you talkin' about Tom. The brand new Eye-suzu engine that I put in mine hasn't burned a drop of oil for over a year now. I still check it religiously, but to date those extra little holes that they drilled in the pistons seem to be doing their job.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless
Super VXer
Good for ye. But I'm talkin about a $2 fix to keep from needing a new engine.
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