[Vwdiesel] Low oil pressure?

[mikitka]

Sounds exactly like my engine, 8psi idle and 20 at cruise. The only
difference is I had my engine rebuilt all but the head and turbo. New
pistons, bearings rings yep even intermediate shaft bearings.  Hey there
might be some light at the end of the tunnel. :)

Nick
 

Well, got the electronic oil pressure.  Cheap Actron gauge.  Shucks, it says

20 psi cruising, 8 psi at idle.  Engine runs fantastic.  I haven't had a 
chance to swap the gauge yet and get a second opinion.  The needle doesn't
have a 
very fluid motion, so it is somewhat suspect, but disconcerting none the
less.
Please doublecheck my logic.
If low oil pressure is confirmed at head and filter flange, then the
possible 
sources of low OP are:
Oil pump/relief valve
Main bearings
Rod bearings
Cam bearings
Intermediate shaft bearings
Turbo bearings (some play in shaft, so definitely suspect)
Did I miss anything?
What's the deal with swapping the intermediate shaft bearings?
I guess it's time to go look at the junk block.
The eninge had 180K miles on it, but ran great.  It always starts on the 
first rev. of the crank.  Considered rebuilding before installing it into my

vanagon, but the coin came out heads.
Andrew
 
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