<VV> Fwd: typical idle vacuum reading?

[Bryan Blackwell]

From the factory the dipstick tube goes into the oil, as Bob Helt wrote that was to minimize fumes.  There's a small hole on the side to relieve pressure, and if the engine is tight that's all you need.  However, engines with some significant blowby will pump oil up the dipstick tube, so if the engine otherwise runs acceptably, the simple solution is to break it off even with the crank case (and maybe don't use the heater).  I recall reading inserting a screwdriver and rocking back and forth will break off the tube.

--Bryan

On Nov 3, 2011, at 8:21 AM, Ken Pepke wrote:

> Pumping oil out of the dipstick tube can be caused by the length of the dipstick tube.  If that tube goes far enough down for the end to be in the oil it does not take much crankcase pressure to push oil up and out.
> 
> Ken P