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Re: [T3] breather flapper valve


On 23 May 2003 at 15:37, Edward Morris wrote:

> at some point there will a large enough pressure diff
> between the the crankcase and atmosphere to overcome
> the butterfly's attached 'counterweight' ?  Does this
> work as engineered or are there practical
> alternatives? 

This just allows a bit of vacuum to be applied to the breather and crankcase 
when the intake volume is small enough that the flapper isn't drawn open. It 
works very well, but it's also set up so that you can lock it open in warm 
weather when it's not so important.  

It's main purpose is to prevent excessive condensation of water in the 
crankcase in cold weather. It works quite well.  

-- 
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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