I just figured I would throw this out there for anybody who has an engine that may be a little worn and/or is leaking oil. My buddy (actually his wife) told me about this gizmo called the Envalve. It takes the place of your PCV and is supposed to eliminate blowby and oil leaks. He tried it on his wife's '70 Camaro with a super tired 350 that leaked like a sieve. He said it totally eliminated the leak and made it run better. Yeah, right.

Normally I don't buy into these types of widgets as most if not all have proven to be crap. But it fascinated me because I know he's not a bulls****er, so I researched it a bit and found that there was a lot of negative talk about it on forums and such...by people who have NOT tried it. But I read the feedback on ebay where it's sold and there were over 400 and all positive with descriptions like IT REALLY WORKS! etc. etc. by people who HAVE tried it.

Anyway, I'm super anal when it comes to my engines. But I figured what the hell, I ordered one for my El Camino (383 stroker) that has a pretty substantial rear main oil leak and I was shocked to see that it does actually work! I drove it yesterday for about 2 hours and zero oil on the floor after parking it and leaving it for a day. Basically it creates a vacuum in the crankcase (you can't have a breather, the engine needs to be sealed) and the theory is, there can be no leak or blowby where there is a vacuum. I can't really say how it eliminates blowby as my engine is fairly new with little or no blowby.

It's kind of expensive, but if it saves you from tearing your engine apart or leaving spots everywhere you park, it's well worth it in my book. Anyway, maybe worth a try. Their website isn't very good, so there's not much info there. I called the number and got a woman who told me that her husband who recently passed away is the inventor and she doesn't know much about them, she's just keeping the dream alive and sells them. I would have loved to talk to this guy as he seemed to be an outside-the-box thinker. And, no, I'm not a salesman for the company, lol. I was just amazed at how well it works, I wished someone turned me onto it sooner!

http://www.envalve.com

http://www.ebay.com/itm/ENVALVE-ends-BLO...e-/260702670752

Basicly a check valve. So it's now pulling combustion gas past the rings even more along with road dust and dirt through the seals as the engine runs instead of blowing oil out. I think that might be right ???

It's a PCV valve with a vacuum regulator and a lot of hype attached.

Look at the patent

http://patft.uspto.gov/netacgi/nph-Parse...uery=PN/5542401

BTW, the inventor died in 2009, not recently.

You could mimic most, if not all of the effect by sealing the hole where the breather is on your current engine.

My mistake, I assumed that he had died recently. I suppose you're right about blocking off the breather. I thought about that before I ordered it, but I wanted to do the experiment as described by the claims to see if it had credibility.

I took it as you'd been told that as a sympathy ploy, nothing more.

Ahhh, got it. Thanks.

Well, one thing for doggone sure, it does NOT eliminate blowby. If anything, it increases blowby by decreasing the atmospneric pressure in the crankcase.

It may load the oil rings more and thus increase their efficiency, but blowby doesn't come because of the oil rings. Blowby is when the compression ring isn't sealing well anymore. Generally this causes the oil rings to flutter or unload, IIRC. But the blowby starts at the top ring.

I found out about leaks when my PCV hose was blocked, engine leaked like a sieve. So returning the PCV to operation eliminated most of the leakage.

The PCV circuit would lean out the engine at idle, so the valve is closed at high vacuum and opens at lower (loaded) vacuum. This other contraption depends on the crankcase being sealed to avoid leaning out at idle. The only air coming through the hose would be air that leaked into the engine.

The contraption could be problematic in that depending on where the hose is plumbed into the intake, one or more cylinders might become oil fouled from the vapors. I had this happen with a leaky vacuum pump which would leak oil into one runner of a six cylinder, but only on steep downhills. It'd literally cover the road with smoke. That one plug could oil foul in 10 minutes.

R.

The description of PCV on their site seems opposite of the way mine has always worked.

Mine: PCV valve is open when manifold vacuum is high, at idle or cruise. Valve closes at full throttle or under load, when manifold vacuum drops.

A PCV valve is nothing more than a metered check valve.

The meter controls how much is pulled into the intake, if it leans you out find another PCV that flows less. The check valve part is to make it it only flows if intake pressure is lower than crankcase pressure, sort of a backfire stopper more than anything else. It'll flow a WOT if blowby in the crankcase is sufficient to open the check valve. But if that happens, you have other issues to address.