I put a filter in the place of the elbow... the filter fits perfectly in place of that elbow and had a provision for a hose on the other end. I conected that end to the Throttle Body.

So far I dont get any oil in to the TB anymore. Everytime I disconect that hose its dry. I gues its acting as an oil separator and the blow-by isnt enought to overcome the filter and get into that hose anymore.

As you guys can figure out... My air circulation has remained the exact same as Factory and I stopped the oil from running up the hose and upto the TB.

For the previous posts that say it does not do crap for the engine... well it done some crap for mine. I think if my engine had lots of blowby then the separator would probably be useless. I guess its just vehicle specific. It doesnt add any horse power and It doesn make the engine run smoother in my case it has only kept my TB from sucking oil from the valve cover up.


Dont knock it till you try it the filter is either a Purolator B23165, deutsch BF412 or Fram BA6592. They are all the same filter and they are cheap. Dont forget to replace the PCV. that maybe the problem if its plugged up.

Marvin

 

A valve cover breather can do all that?

Basically there is absolutely no point to a breather on an engine that has a PCV system. Breathers are only for those engines that have no PCV.
If it is felt the stock PCV system is not enough ventalation and a breather is require then there's something seriously wrong.

 

I think you have that figured all wrong. Your air circulation is not the same as factory at all, once you put that breather on there.

You now get no oil in the hose because you have opened up the system to the atmosphere. The hose no longer does anything. If there was any vacuum present on the hose, it would merely pull air through the breather and not from the crankcase. Engines with more blowby will get more oil in the hose in a closed system.

 

Sorry to burst your bubble this time Shoebox. What I installed its not an air breather... its sealed and has no openings to the atmosphere at all. It only connects inline in between the valve cover and the Throttle body.

Once again there is no opening to the Atmosphere in the whole circuit. Perhaps I should have explained that more clearly. Think of an oil separator. Maybe I used the word "breather" and that threw you off so to make this clear... It plugs into the valve cover on one end... it has no openings to the atmosphere and on the other end I conected the hose to the TB. There arent any openings to the atmosphere anywhere else.

I am well aware I need to keep that metered air in check and this is the only thing I found that would not let outside air in. I was only thining of making my own oil separator but then again... at the point the oil gets so bad then I will defenetely need a new engine. So far my engine has no blow by.

Marvin

Edit: sorry for the confussion.

 

I guess since the thread was about breathers, I was assuming such. My bad.

 

I recently bought a set of B&B valve covers which came with a K&N breather on each valve cover. From what I have read here, should I ditch the breathers and use the factory setup?

 

Even with a pcv system you need a breather of some type to keep contaminates out of the system. The lt1 sytem just uses the air filter as opposed to some other types that use a seperate filter.

 

i think it looks cool....i have edelbrock valve covers with a breather on each one with no side effects for the past 5 yrs

 

All the old carburated engines had little filters in the air cleaner housing to keep the oil from the crankcase "breather" from getting into the carb. When they got saturated with oil it was a sure sign of excessive crankcase pressure from a worn out motor. Wonder why there isn't any such provision on the LT1s.

 

Welllllll..... not "exactly". While you have the same flow path for the air supply from the TB to the valve cover, and you have the same flow path for relieving excessive blowby by flowing it in the opposite direction to the TB, you don't have the same volume of air flow. The filter adds pressure drop, and pressure drop reduces flow. As the oil builds up in the filter, its going to add even more pressure drop.

I agree, it eliminates the oil problem.... but in fact its a band-aid for a bigger problem.

 

this is an intelligent, text book response. I see it as worse case scenario though.... I have had that filter installed for two years and has not come even close to getting plugged up or even dripping oil out of it. Yes the filter its not necesary but it has kept the hose from collecting oil mist that accumulates as time goes by (years perhaps). If my filter ends up clogged with oil it would defenetely be time to get a new engine thats fer sure.

Marvin

 

I just had a second thought... this filter will eventually get cloaged up I am sure.. at 3dollars a piece and replacement interval (for my car that is) of over two years... see what I am getting to?

Blah... its overkill anyways.

Marvin

 

It doesn't have to be "plugged up" or "dripping oil out" to become a flow restriction.

Not sure why you feel you have to do the putdown bit by calling it a "text book response." That statement is backed by 40 years of experience in designing fluid flow systems.

 

i have breathers on both my valve covers. car runs more than fine. my understanding was the release in excessive pressure prevented intake manifold leaks

 

If you are looking for a cross reference, look at 1990 FORD TRUCK BRONCO II 4WD 2.9L V6, that is the OEM where this part comes from....