Who's Running a Catch Can?

[WMCCjames]

i'll be having one but i made my own out of some 4 inch oval pipe and put a bung and a drain on the bottom

FYI...You need something inside to condense the oil. Any empty can will not work well.

[ThreeHonks]

no, a quart every 3K might be a little more accurate

man, thats still a lot. I barely get any oil in my catch can. Maybe like a few ounces ever few hundred miles.

[sman]

Ive had a huge problem ever since my cam and intake swap. No idea what it is, but its SUPER annoying, tried the revised PCV valve, and valve seals twice. Not sure where my problem is. $20 if anyone can figure it out. Ive been screwing with it all this year, its also largely part of the reason I very well will not be getting it out next year, always having to carry a quart of oil with me, no AC, etc, its just not fun anymore..... I changed the spark plugs 3 months ago (less than 10k after the cam swap) and there was so much shit on them you could barely slide a piece of paper between the electrode.....

[Iroc'nthe87]

From everything I've read on the subject, main culprit points to the rings.

[DETROITMUSCLE]

Leakdown test, sounds like the rings

[1BADAIR]

the big 3 accept 1 quart per 1000 as acceptable,

[ThreeHonks]

have you done a cranking compression test? oil on the plugs is NEVER a good sign, most likely rings if you have that much oil contamination

[Lucky SOB]

Right, most places I've read said 1 quart / 3000 miles is the norm

[sman]

Did a compression test earlier this year on just one of the 8, cant for the life of me remember what it was, 180 seems to be sticking out, and I dont have a leakdown tester. Had 0 consumption before cam swap, tons after. I expected better numbers out of the car aswell, but thats a whole nother point, possibly related?

[ezcruisn71]

What kind of valve covers are you using?
Are they the stock covers or after market.
If they are aftermarket covers some of them don't have oil separators (baffles) in the valve covers.
This can cause excess oil to be drawn up into the engine.
Even some of the stock valve covers have very poorly designed oil baffles in the valve covers causing oil to be sucked back into the engine.
We continue to improve on this design all the time here at work.
Do a google search on " valve cover oil baffle " and you will be amazed on what you will find.
I am not saying that this is your problem, but I would not rule it out.
It could still be other things like piston rings, worn valve guides, gaskets, etc...

[Boost Addict]

Do a compression check on all cylinders then follow it with a wet compression check. If that doesn't raise it do the leakdown.

[ezcruisn71]

When you changed the camshaft it lowered the intake manifold pressure at idle and cruising speeds because of the valve overlap design on the camshaft.
This in turn will cause the PCV valve to flow more crankcase vapor through the valve even though the engine does not need this much flow.
In the old days you could just change out the PCV valve to a lower rated opening valve for more radical camshaft designs.
With the newer engines it is not that easy!

This is how the PCV valve works:
At low Engine speed manifold vacuum is high. This pulls the
PCV plunger to the extreme forward position. Crankcase vapor flow is reduced to a minimum through the PCV valve. The low rate of the flow is adequate for ventilation at this engine speed.
At higher Engine speeds manifold vacuum is (low) decreased. The plunger is only drawn to a point about midway in the housing. This allows a maximum flow of crankcase vapor though the PCV valve.

If you are only using this car during the Spring, Summer and Fall, I can tell you how you might be able to avoid the excessive oil usage for a very cheap price.

[sman]

What does the hose that goes to the throttle body do? Because the pcv hoses arent full of oil or anything.

[ThreeHonks]

What does the hose that goes to the throttle body do? Because the pcv hoses arent full of oil or anything.

part of the pcv system. If you look in your intake manifold and there is not a lot of oil in there I would have to point my finger at the rings. Having oil on the plugs is a bad sign, it actually takes quite a leak to get oil on the plugs. Valve seals will not leak enough to do that, some setups dont even use valve seals at all

[GoHard]

There is also a new style pcv valve without the bigger hole and rattle, it is a smaller pin-hole ls-truck style. I believe I found it on WS6STORE.COM and swapped mine.

I have this pcv valve from ws6 store in mine and a RX catch can. The RX catch can is the same design as the RevXtreme, except they went out of business so the the name has changed to "RX". This is one of the good catch cans, or so I've heard.

Only 500 miles with it on so far, I'm going to drain it and change the oil very soon. Hopefully it's catching oil because my car has been losing a quart every 1000 somewhere and right above the exhaust pipes on the back bumper is always black (heard this is a sign of burning oil or running rich?). I did get a weird hissing noise (kind of sounds like a vaccum leak) after the pcv and catch can install but can't figure out wth it is.