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EA82 Head Hoses interconection


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Hi All!

:)

Since the Weber Swap, my White Wagon Runs Great, no issues with that so far...

JesZeK-SubaruEA82AnimatedEngine.gif?t=1222304982

...But now an Old Problem that was asleep, seems to comes awake now!

Two Years Before the Weber Swap, when my Subie had the Craptachi Carb and the Original Air Filter Box, the Engine Started to Blow some Oil from the Heads, Thru the Head`s 5/8" Hoses to the Air Filter Box...

The Air Filter Box had around an Ounce of Oil Around the Filter and even Around the Carb`s Throat Opening! :eek: I Had to Clean it every Weekend... :-\ ...

I Know that Behaviour must be Caused due to Worn Piston Rings, Because I Alredy Changed the Valve`s Seals at each Head and the Blowed Oil Problem still Continued.

Then, with the Weber Swap, I First Connected Both Heads with a 5/8" Cross to the PCV Valve, (so it will "Suck" the Heads Fumes and sending `em to the Exhaust) and the Remain Opening, to the Weber`s Air Filter Box...

(Some time Ago I learned in a Very Intelligent Post by GD, that the PCV Valve Sucks the Dangerous Fumes from the Heads to Help maintain Clean the Engine`s Oil and prevent Dangerous corrosive Fumes from Damaging the Engine.)

...But some time after my Weber Swap was done, I Had to Remove the PCV Connection, leaving the PCV Alone with its Own Air Filter, and Letting Both Heads Connected to a "T" and the Remaining Opening to the Weber`s Air Filter Box... Just to Prevent the Heads` Blowed Oil from going Thru the PCV Valve, Drowning the Intake, with the Obvious Consequences... :mad: ...

...So, the Blowed Oil Problem dissapeared then... (and since that, I Try to Change my Subie`s Oil more Often)

...Untill the Past Week, where the Amount of Oil Flowin` from one Head to Another, seems to be Increased, and part of it are making the Air Filter Element very Oily and Dirty. :banghead:

I Know that Eventually I will need to Change the Piston Rings on my Subie... (Driving mainly OffRoad and in Very Muddy / Dusty \ Rocky Conditions, can let Huge Amounts of Dust to get Inside the Engine and Dust Works as Sandpaper there; that plus the Engine`s Age and Mileage are the Reasons Why I Believe that the Worn Rings is Causing that "Blowin` Oil" Effect)

But to Change those Piston Rings Seems to be not Required yet, `cos the Engine Runs Soo Great!, it has no White -nor Black- Smoke at the exhaust, and the Engine are not Burnin` Oil... Spark Plugs comes Clean & Pink, and it Feels Soo Powerful! ... it just "Blows" Oil from the Heads thru the Heads` 5/8" Hoses.

So, The Main Question is:

Could I Connect one Head Straight to Another, Thru a New 5/8" Hose, Directly, Without Damaging anything?

 

I Ask that, `cos if that is Safe, it will Solve many Problems:

  1. The Oil Blown from one Head will Travel to the Other one and Viceversa, so No Oil on Intake (Thru PCV) or Carb, or Air Filter Element!
  2. The Weber`s Air Filter Box`s Opening will be Used Just for the PCV Valve, so No More extra Air Filter will be Needed!
  3. No Oil Waste! :D
  4. it will make Things More Easy, even to Wash the Engine!
  5. Engine will Look -and Be- Cleaner! ;)

But, I am Not Sure if That will be Safe... Because I Feel Some Sort of "Pressure" Made like Vacuum / Blown air by the Heads, thru their 5/8" Hoses.

So, if I Connect the Heads to Each Other, will it Damage the Engine? (More than the Loss of the PCV Suckin` bad Fumes)

Or will be some Sort of "Pressure / Vacuum" Fight between Heads that can be Harmful or Fatal to the Engine?

Will that Interconnection, damage the Head Gaskets or Something Else, like Hydro Lifters, Performance, etc?

What Shall I Do with my Subie`s Head Hoses?

Thank you Soo Much, Best Regards!

JesZeK :burnout:

Edited by Loyale 2.7 Turbo
Yellow will be my New Colour if Board Remains Dark Grey! ;)
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I'm really surprised none of the engineer-types have been able to help you with this. Maybe my input will get their blood stirring :)

 

I believe your engine needs to breathe, so connecting the heads directly together with no outlet would not be a good thing. I guess you could try it, connecting the hoses loosely, take a short drive and see if they blow off.

 

In the old days, there was simply a 'breather pipe' that let the gases go out directly into the atmosphere. That caused lots of air pollution, so now we have the PCV valve.

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run both hoses up to a 4 way T. one goes to pcv valve on intake 2 go to the vent ports on the valve covers and throw on a oil air seperator filter on the 4th one

 

cost of parts if u have to buy everything, 25 bucks..

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  • 2 months later...

here is what i have in my 92 Loyale

picture.php?albumid=41&pictureid=400

 

picture.php?albumid=41&pictureid=401

keeps the solids (sludge blow by) from going back into your intake and allows the gasses to re combust. note the indicator on the sight tube in the first picture.

Edited by cmiller
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Thank you for your Kind Replies! :)

Those Cans seems to be a Great Idea! :banana:Could you Tell me How to Maintain those Cans Clean? ... I Mean: They have a Way to Clean up, isn`t it? ... if so, How Often?

Could I Connect Both Heads` Hoses to just one Can, and obtain a Single Hose Out? ... That will be Great!

Where could I Obtain those Cans?

Thank you, Best Regards!

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If you have more money then sense, you could buy one from perrin performance, $150 :dead:http://www.perrinperformance.com/products/show/56/Oil-Catch-Can-Overflow-Tank?category=4&model=22

 

local speed shop should have an oil catch can, but a bottle with hoses will work just as well, and save more money :brow:

 

the oil fill side, # 1 & 3 is the FRESH AIR SUPPLY

the other side is the blowby gas delivery to pcv system side

DO NOT connect both sides together

I prefer to use clear vinyl hose, 5/8" ID

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Thank you for your Kind Replies! :)

 

Those Cans seems to be a Great Idea! :banana:Could you Tell me How to Maintain those Cans Clean? ... I Mean: They have a Way to Clean up, isn`t it? ... if so, How Often?

 

Could I Connect Both Heads` Hoses to just one Can, and obtain a Single Hose Out? ... That will be Great!

 

Where could I Obtain those Cans?

 

Thank you, Best Regards!

 

In the picture you can see that I have kept the stock breather lines coming off of both heads. And at the "T" junction where they would normally go into the intake I ran a line to the catch can then out of the catch can back into the intake. The one I have can be purchased from these guys: http://www.perrinperformance.com/products/show/56

or AVO makes one here: http://yhst-49187380673845.stores.yahoo.net/avobrtakit.html

 

hope this helps. Its a good thing to have and it will still pass DEQ, (emissions test we have to pass to register our rigs here in Oregon). If you are handy you could make one yourself. Just shop around, anything with and input, output, and drain will work. The Perrin one that I have has a sight tube so you can see when its getting full. Its easy to clean, well made and looks sharp. I just pop off the sight tube and let it drain into a cup and then reconnect it, good to go.

Edited by cmiller
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