[Vwdiesel] Blow-by test?

[LBaird119 at aol.com]

In a message dated 8/17/2010 2:44:14 PM Pacific Daylight Time, 
joe at haasenpfeffer.com writes:

> What does this mean?  And what is an acceptable
> amount of "percolation"?  Because my 82 Rabbit does it quite well.
> 

  Actually, at an idle they seem to have more blowby than at higher 
rpms.  Could be a smoothing out of the pistions pushing air around, 
or it could be a more consistent pressure holding the rings tighter.
There's also the issue of an overhead cam whirling around right 
below the filler cap. 
  Overall, they seem to have a lot more blowby than you'd think is 
acceptable, but it seems to be acceptable.
   Loren