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Vented or unvented cap?
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Author:  phillb [ Sun Nov 06, 2011 5:17 pm ]
Post subject:  Vented or unvented cap?
Several months ago when I changed to a standard rocker cover I was told the standard non vented cap is what I should have.

But now thinking about it shouldn't I have the standard vented cap?

My venting setup is pictured below.

Cheers

Image
Author:  Morris 1100 [ Sun Nov 06, 2011 5:22 pm ]
Post subject: 
You should have a vented cap.
Author:  drmini in aust [ Sun Nov 06, 2011 6:17 pm ]
Post subject: 
Morris 1100 wrote:
You should have a vented cap.

The PCV system cama with a vented cap, but it makes SFA difference which you use really. I found this years ago.
I have a vented cap on the 1360 and a non-vented on the 1412, both run a PCV from the rocker cover into the Weber manifold. No running probs, leaks or mayo with either.
Author:  phillb [ Sun Nov 06, 2011 6:46 pm ]
Post subject: 
drmini in aust wrote:
Morris 1100 wrote:
You should have a vented cap.

The PCV system cama with a vented cap, but it makes SFA difference which you use really. I found this years ago.
I have a vented cap on the 1360 and a non-vented on the 1412, both run a PCV from the rocker cover into the Weber manifold. No running probs, leaks or mayo with either.


I've had no problems either. The only thing I've noticed that I thought might be related is that occasionally the idle will be a little high when you first pull up then slowly drop to normal. I thought this may be as more and more of a vacuum builds up in the crankcase.
Author:  drmini in aust [ Sun Nov 06, 2011 7:08 pm ]
Post subject: 
Mine both do that (with a 45 dellorto, only when hot after a good run)- so I dunno. It may be a factor, maybe not.
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