[Vwdiesel] Re: running away

[Libbybapa at wmconnect.com]

Why does the blocked screen cause runaway?  Does it pressureize the block and 
blow oil past rings, and past valve stem seals?
Another cure if runaway is caused by blowby, is to add a fitting to the block 
off plate next to the vacuum pump.  Then the crankvent can run down from 
valve cover to a tee at the block and then up to the intake.  It has the effect of 
draining excess blowby oil back to the block. It also makes an easier time 
for the oil to drain from the head, as it isn't fighting the blowby gasses 
coming up the oil drain holes.  My TD had a fair amount of oil in the intake, and 
since rerouting the crank vent there is virtually none.
Andrew