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  #11  
Old 01-31-2014, 07:46 AM
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So what would be the cause. I'm confident that I'd fill the bowl on mine. Is there a mod for the bowl back to crank case???
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Old 01-31-2014, 08:24 AM
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Quote:
Originally Posted by J Kimmel View Post
this mod doesn't increase consumption but if your engine is vaporizing that much oil to begin with you might have a consumption problem
Exactly.
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Old 01-31-2014, 09:17 AM
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Default Perhaps this will clear things up.....

"The article below give a good overview of the system and reason to have it. My main reason for the install is to avoid the common 80 series EGR failure down the road. Time will be the judge of that." Landcruiser Phil - Copperstate Cruisers

PCV System Oil and Air Separator

The crankcase in a car is used as a storage place for oil, usually in a pan located below the crankshaft. While the crankshaft and the oil aren't intended to come into contact (because if they did the oil would get frothed up like a thick, black milkshake), oil vapors can still find their way into the blow-by gases. It's not a good idea for these oil vapors to be recirculated back into the cylinders along with the blow-by gases because they make the gas-air mixture too combustible, equivalent to lowering the octane of the gasoline, which in some engines can degrade performance slightly and in older engines can even cause backfire when the gas-air mixture combusts prematurely. The oil vapors can also coat the air intake with an oily film, gradually clogging the air flow over time. If you don't drive a high performance vehicle, these problems aren't exactly crucial to your car's operation and the oil build-up can be scrubbed out periodically during maintenance, but some people (and some car manufacturers) prefer to have something that will scrub the oil out of the blow-by gases before they're recirculated in the first place. Enter the oil and air separator.

The idea of an oil and air separator is to extract the oil from the air before it's sent back to the intake manifold and put it someplace where it won't cause a problem, either back in the crankcase or in a small receptacle called a catch can. Not all cars come with built-in oil separators and not all cars necessarily need them, but they can be purchased as aftermarket items. And if you have the necessary DIY skills, you can even make one yourself. There are actually a number of different ways in which these oil and air separators can work. Probably the most common kind blows the oily air through a mesh filter. The oil droplets are trapped in the mesh while the air passes through. The most effective such filters are made up of microfibers, which can trap very small particles of oil. Alternatively, the air and oil filter may require the recycled gases to go down a tube with holes in its side. The lighter air molecules escape through the holes, while the heavier oil droplets fall all the way to the bottom, where they can be removed. And some advanced systems use a centrifuge to drive the heavier oil droplets out of the air. The oil coalesces on the sides of the centrifuge and can be channeled back into the crankcase.

As an aside, all piston aircraft engines have these in use. Terry
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  #14  
Old 01-31-2014, 09:31 AM
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I don't think anyone questions the usefulness of it, just how much is coming out. Maybe I'm missing something. I took my throttle body and intake apart at 187,000 miles and there was a a little gummy varnish at the very end near #4 from the crankcase ventilation but not so much that I thought I needed to install an oil separator. The back of my TB throat plate gets a little sticky after a few years, but not excessive. Now I do rotate PCVs every oil change, one on deck sitting in solvent while the other is in the valve cover, which may have something to do with it.
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Old 01-31-2014, 03:15 PM
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Side note PM sent
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Old 01-31-2014, 04:28 PM
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It's mostly condensation slime that catches in those filters. The 80 series guys have been doing this on mud for some time. Yeah, some oil does collect there, but most of the guys that post pictures show some light brown sludge in it that they dump at each fill up.
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  #17  
Old 02-02-2014, 06:21 AM
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For what it's worth, Toyotas oil consumption specification is 1 quart of oil per 1200 miles of driving.
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Old 02-02-2014, 10:57 AM
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Quote:
Originally Posted by 74fj40 View Post
For what it's worth, Toyotas oil consumption specification is 1 quart of oil per 1200 miles of driving.
In my Robbie Rebuilt 1FZFE (with an untouched 195,000 mile short block) I have ZERO consumption of Mobil 1. I'm getting lazy about checking oil. Better do that today.
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  #19  
Old 02-11-2014, 01:37 PM
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I hear the 3FE guys talking about this as the intake runner does get pretty nasty from the PCV being in the valve cover.
I have bought the seperator, but not installed it yet.
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  #20  
Old 02-11-2014, 03:45 PM
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Aren't all PCV valves in the valve cover?
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