PCV blowby question

[maddog]

no they might try killing me then.

[earth1]

Well you have peaked my interest with the Envalve product... I am both skeptical and curious,

Josh

[IowaEagle]

I saw one in use at the Meet in Omaha.  They appear to do what they say they will do.

[Jurjen]

I think the ENvalve will do the job.
The original PCV-valve has a little more capacity than the actual blow-by of a new(ish) engine.
This keeps the engine at a low vacuum.
Fresh air is taken in thru the rear hose from the airfilter housing.

When the engine is getting worn, there is more blow-by than the PCV-valve can evacuate.
The engine crankcase becomes pressurized and the excess vapours are now pushed out through the rear hose into the air filter housing.
The ENvalve is just a high capacity PCV valve and will take care of the extra blow-by gasses.
It will not repair worn piston rings, but it will compensate for it.

[jim]

An Egg to you, sir, for that explanation.

[HawkenEagle]

The Envalve could also save your engine from fuel dilution problems as it requires you block off the fresh air hose and keep the engine at a constant 3 to 4" of Mercury. Their own tests in the literature showed in the same engine the engine lubricant remained cleaner and oil analysis showed viscosity retention lasting longer. Severe blow-by will cause a motor oil to sheer out. This system evacuates these gasses at operating temperature and like Jurjen said - isn't a repair but rather helps you get along through its demise.

I should do a compression test but the lady at ENvalve said the 256 Jeep is her #1 customer base which leads me to question the design of the oil drains in the head.
Another situation may arise where not just more blow-by but flooding in the valve cover of oil and a slight amount of pressure will naturally push the oil through the fresh air hose into the air cleaner. Not with the Envalve! Instead this small amount of oil will be burned rather than pool up in the air cleaner or contaminate more oil in the cump.  I reciently saw a engine cleaner test where a Jeep 4.0 was used and it too had more carbon build-up than the same year toyota and cadillac used in the test. This shows the importance of regular intake cleaners.
 

[68AMXGOPAC]

Hawken, good point on dillution and flooding of oil in the valve cover.Both are blatently apparent in mine.This really is the first run of the Money Pit II , for any length of milage, as I don't think it got driven because of it's blow-by when Smitty had it.I had changed the oil after putting about 200 miles on it because it had sat so long without bieng used.It now has 2500 on the change and listening to the engine, and looking at the oil on the stick it needs it allready.I also noticed when at first trying to evaluate the oil issue , that it did push out the fresh air vent, and seemed to lay up in the head alot,never  had an issue like this before,bad rings would usually smoke like crazy , but this doesn't at all. I am getting one of these and trying it out,seems apparent it works by the testimonys.

[AMCKen]

I wonder what would happen if one just plugged the fresh air hose and used the regular PCV valve? Would the engine then start drawing air into the crankcase from where ever it was leaking? Could mean drawing dust and dirt into the crankcase rather than the filtered air from the air cleaner.

[ammachine390]

If you were to plug up the fresh air inlet, the blow by would not be able to escape during low manifold vacuum. So if you were flooring it long enough, or just loading the engine long enough, the pressure would build up, and you would blow a seal somewhere.

[craigp29690]

While replacing all the heater hoses, heater valve, t'stat and water pump I had to remove the air cleaner to get to the rear hose going to the heater valve.  I noticed a PCV at the rear of the valve cover piped to a connection above the base of the carb, not to the air cleaner.  There is a small Mr. Gasket air filter at the front of the valve cover.  The port on the air cleaner that I would asusme the PCV would be routed to is not connected to anything.

This setup is different than my 81 Concord so I don't have a "go-by".  Since I would assume the PCV should be connected to the air cleaner what would normally be connected to that large of a port on the carb?

Also discovered one other thing.  Before all this work the car sounded like it had an exhaust leak and when you first started it up you could actually see (and smell) a thin cloud of exhaust waft up in front of your face.  I figured a donut is gone or maybe a hole somewhere.  When putting things back together there are two large hoses that connect to the back of the air cleaner (part of emission control coming off the exhaust) one line was very loose, I clamped it, started the car to check out the repairs and exhaust noise and leakage into the car were gone.  It was as quet as a ninja.

[JayRamb]

I put it in an EN VALVE in my 84 Eagle with 245,000 miles and it runs like a TOP! I cannot believe how the vacuum increased and it gets better mileage and no blow by. I actually found the oil leak from my valve cover that I tightened down and the leaks stopped. AMAZING product. the En VALVE!  I bought one for my show car...87 Eagle.

[68AMXGOPAC]

The PCV does go to the carb base port.The other one used to go to the air cleaner but someone has just put a "breather" there in it's place.Mine used to have the breather also that someone installed, but blew too much oil residue out of it , so I put the original hose back to the air cleaner.It goes to a small square plastic piece held inside the air cleaner with a small mesh filter in it.

[ammachine390]

I put it in an EN VALVE in my 84 Eagle with 245,000 miles and it runs like a TOP! I cannot believe how the vacuum increased and it gets better mileage and no blow by. I actually found the oil leak from my valve cover that I tightened down and the leaks stopped. AMAZING product. the En VALVE!  I bought one for my show car...87 Eagle.

Did it used to pump oily mist/oil into the air cleaner? Did you just install a cap on the breather so that the crankcase actually holds the vacuum?

[JayRamb]

If you to www.envalve.com it will give you the information on how it works.

[ammachine390]

If you to www.envalve.com it will give you the information on how it works.

I've been on that website before, I understand the principle, but I don't see any instructions. Just wondering how bad your blowby was, and whether or not you capped the pcv inlet.