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  #131  
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Anybody else have a rigid mount that lowers the RPM when the oil cap's pulled on hot idle?
I wouldn't think this has to do with compression ratio unless there is more normal blowby in an S model than others.
What about 86-90 and prior models?
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  #132  
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Not sure If matters, I doubt it, but I'm not breathing from the heads anymore either. Never tried it with the failing umbrellas.
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  #133  
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Yeah I probably shouldn't have assumed but I did assume your Krankvent wouldn't allow back-fed air.
Seems like the advertisement you posted said it was a dedicated one way valve, shutting down air intake when closed.
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  #134  
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It doesn't allow it and it is a one way valve. In only feel it pulsing out. Not sucking in.
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  #135  
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Quote:
What about 86-90 and prior models?
Never noticed it but then my engine came with the better 86-90 engine breather design.

Quote:
Seems like the advertisement you posted said it was a dedicated one way valve, shutting down air intake when closed.
That is the purpose of a PCV.
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Quote:
Originally Posted by Four Speed View Post
Never noticed it but then my engine came with the better 86-90 engine breather design.


That is the purpose of a PCV.
I'm not getting the correlation or why you think my one way valve WOULD be sucking air.
I think the issue is you're getting air into the oil tank which I no longer am. I don't get 1 air bubble and oil is is returning faster. My tank level went up a little.
I put a piece of paper by the end of my krankvent. It's not sucking in.
Just started raining but tomorrow I'll see if I can take a video of it pulsing out.

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You're killing me.

Just thinking out loud FourSpeed.
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  #138  
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I didn't think you were sucking air to begin with.
I think I am.
Matter fact, I think all OEM 91-03s are due to that little hole in the pic above.
I am wondering about the design now.
I see that air/oil will separate upon impact of the umbrella.
I see some will get past the umbrella and settle in the little sunk in chamber.
04+ breathers also have that little holding space in the shelf between in/out hookups.
But they don't have any holes to drain the oil collected inside the breather unit.

Looking for more reasons why 91-03s don't have as many breather issues as later models.
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  #139  
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Quote:
Originally Posted by Hippysmack View Post
I didn't think you were sucking air to begin with.
I think I am.
Matter fact, I think all OEM 91-03s are due to that little hole in the pic above.
I am wondering about the design now.
I see that air/oil will separate upon impact of the umbrella.
I see some will get past the umbrella and settle in the little sunk in chamber.
04+ breathers also have that little holding space in the shelf between in/out hookups.
But they don't have any holes to drain the oil collected inside the breather unit.

Looking for more reasons why 91-03s don't have as many breather issues as later models.
Isn't there a tiny hole in the plastic housing on the later ones. Seems to me there is albeit tiny. Not sure if oil would drain out.
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  #140  
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Perhaps air is being pushed past the guides into your combustion chamber when you get too much pressure?
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