EJ25 death 81k (2007) JDM longblock replacement w/2011

[Sodo]

Wow lots of catch cans (Amazon Search: "provent catch can").

Here's a video showing how a separator works. It says "in action". It's not, it's a computer-animation. https://www.youtube.com/watch?v=FrvciHy2wD8
It makes sense though, just getting the oil out of the crankcase air reducing the oil into the intake tract.

$24 and up for shiny aluminum CNC speedwow type brands,
$56 for plastic ProVent
$147 for Moroso

One of them uses a SS scrubbie for the dripping element.
Seems like you'd want a physical block (also) like a filter.
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'90 Westy EJ25, 2Peloquins, 3knobs, pressure-oiled GT mainshaft, filtered, cooled gearbox
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered gearbox
....KTMs, GasGas, SPOT mtb

[jberger]

[valvecovergasket]

[Sodo]

OK....well I ordered this $11 clear catch can to see what's passing by between the PCV valve and the intake manifold.

I have to say I was surprised by how small it is.
My simple mind envisioned the size to be about a "palm & a half" as I didn't think anyone would even build one this small.
But anyway there "shouldn't" be a whole lotta oil on the vacuum side of the butterfly right?
If it's way too small I've wasted a whopping $11.00, and perhaps $2400 on the 2nd JDM lump.
But please understand, dear reader, that my cheapass mind goes "Cool.... eight barbed brass fittings in the toybox for $11.00."

If the little size seems "OK"..... there's something to be said for buying a 2nd unit to have a look the other leg
(the crankcase venting to the other side of the butterfly).

==== I drove the 2011 JDM lump yesterday=======

It seems to perform same as when I departed on my 6,000 miles trips, but no SNAP!

I'm so very happy you engine pros are listening in & offering advice.
I hope that my propensity to go off on my own horse a bit doesn't put you off.
Be assurred that what I do takes your advice in heavy consideration.
I hope it's at least interesting enough to keep you in the discussion, your assistance is appreciated by many forum members.
I'm talking to a couple other pros on the sidelines too.

I warmed up the engine, then went out for a highway run, up to to 5500RPM at times. Came home and checked compression. I did the compression test quick&dirty. Remove one plug at a time, start engine, blip throttle, like 500-1200rpm, trying to get about 10-20 hits. All cyls tested at 175-185 psi. Whew!
Does anyone know if these numbers have any validity?
Starters crank at ~200rpm.

But checking the header pipes with the IR temp, I get header-pipe temps (Subaru cyl #s)

#1 290F
#2 375°F
#3 500°F
#4 290F

I'm lasering all the header pipes in "similar" locations, about 1 inch below the aluminum head.

I'm gonna remove & attempt to clean the injectors.
_________________


'90 Westy EJ25, 2Peloquins, 3knobs, pressure-oiled GT mainshaft, filtered, cooled gearbox
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered gearbox
....KTMs, GasGas, SPOT mtb

[Zeitgeist 13]

That looks like it was made for an air compressor. Most catch cans are much much larger
_________________
Casey--

'89 Bluestar ALH w/12mm Waldo pump, PP764 and GT2052
'01 Weekender --> full camper
y u rune klassik?

[valvecovergasket]

[Sodo]

Ok air compressor, I should have seen that.
Cross-marketed to the rice-burner hot rod customer.

Haha most people know I rarely call it a day.
I’ll call it a day when I’ve reached a level of understanding that satisfies me, or if it becomes un-interesting, or if my other needs pile up and I have to quit dickin’ around. I’m kinda like “retired”, this goes with the territory.

This simple $11 expenditure is supposed to let see with my own eyes, perhaps even realtime,
how much oil is going into the manifold on the vacuum side of the butterfly.
I can then move it to the other leg of the PCV system and compare the amount going to the other side of the butterfly. Or invest a 2nd $11.

I suspect at least some folks are interested as I am.
I’ll keep moving on this for the time being....
_________________


'90 Westy EJ25, 2Peloquins, 3knobs, pressure-oiled GT mainshaft, filtered, cooled gearbox
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered gearbox
....KTMs, GasGas, SPOT mtb

[valvecovergasket]

I guess my concern would be using a device that normally requires a bunch of pressure to collect suspended liquid, without a mesh or filter medium, to draw conclusions about the system performance you could achieve using the right part for the job.

Not critiquing the interest in deep diving, just the intended design of the experiment.
_________________
MegaSquirt resource - SpitfireEFI.com

gone, but not forgotten: '83 tdi westy - swap thread

[Sodo]

I can’t go permanently mounting & plumbing unqualified components still in test phase.

Agreed VCG,,,,,I don’t like the sintered particle filter.
Liquid will soak it, and it will plug.
The filter needs to drain to remain open.
I might put a scrubbie in it.

=======. EDIT. ======

Ok here it is, more like an observation port than a catch can.
Probably won’t “observe” much after the oil darkens.
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'90 Westy EJ25, 2Peloquins, 3knobs, pressure-oiled GT mainshaft, filtered, cooled gearbox
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered gearbox
....KTMs, GasGas, SPOT mtb

[jberger]

[jberger]

It also doesn’t seem that the hose fittings are large enough to effect a meaningful difference in case pressure.

J

[Sodo]

[Jake de Villiers]

Good to hear that your new engine works - that compression is right where you want it.

The water separator on my bigger compressor is three or four times bigger than that device! But it does capture water, so it might do the same for your van.

I've made puke cans for race cars out of clear plastic water bottles: there's no pressure to deal with, so...
_________________
'84 Vanagon GL 1.9 WBX
'86 Westy Weekender Poptop/2.5 Subaru/5 Speed Posi/Audi Front Brakes/16 x 7 Mercedes Wheels - answers to 'Dixie'
@jakedevilliersmusic1
http://sites.google.com/site/subyjake/mydixiedarlin%27
www.crescentbeachguitar.com
www.thebassspa.com

[Syncro Jael]

I installed twin Radium Catch Cans. One for the PCV line and the other for the valve cover breathers.

In the winter they "catch" a lot of crud and water. In the summer they have been clean. At least nothing comes out of the drain tubes in the summer.

_________________
1987 Syncro Westfalia Hightop - NAHT
Subaru EJ25 Forged Frankenmotor, Triple Knob.
Jael = (Mountain Goat)

[Sodo]