Low Oil Prssure on New Engine Rebuild

[Alan Kramer]

James,

Thanks for the reply.  Good point on #1, I don't know for sure (with
instrumentation besides the stock VDO stuff) that the pressure is 0.5
bar...but FWIW, I do know that with that sender and gauge that the oil
pressure is lower on this engine than others.

All the parts I used were 7A, pump, baffle, oil cooler, etc...   They all
played nicely together on the engine before the rebuild.

Your conclusion in your last sentence was unfortunately mine as well...  I
was just hoping for something more optomistic :)

Thanks,
Alan



>From: "James Bell" <doublem at srv.net>
>To: "Alan Kramer" <ackramer at hotmail.com>
>Subject: Re: Low Oil Prssure on New Engine Rebuild
>Date: Sat, 21 Sep 2002 22:42:05 -0600
>
>Alan:
>
>First, Use a Borden tube gauge. Instrumentation
>is first. Do you know, for sure, the oil pressure.
>
>Second: what oil system parts did you use. are they
>all compatible? Cooler, Lines, Temp control manifold,
>filter, oil pick up and baffle.
>
>Rings are not going to cause low oil pressure. Bearings
>and oil gallery faults will.
>
>J.B. in ID.
>
>----- Original Message -----
>From: "Alan Kramer" <ackramer at hotmail.com>
>To: <quattro at audifans.com>
>Sent: Saturday, September 21, 2002 8:56 PM
>Subject: Low Oil Prssure on New Engine Rebuild
>
>
> > Today I started my freshly rebuilt turbocharged 7A (yes 7A, not 3B or
>AAN)
> > 20v engine in my CGT.  Started immediatley on the first crank :), but I
> > watched as the engine approached operating temperature the oil pressure
> > steadily dropped from 5 bar (cold) to 0.5 bar at hot idle.   Oil
>Pressure
> > increases to 3 bar at 1750 RPM.  I'm running non-detergent straight 30
> > weight oil for break in.   I know my rings aren't seated yet, I'm
>definitely
> > burning some oil.
> >
> > My question is, should I be expecting such a low oil pressure on a fresh
> > engine?  Perhaps due to the oil I've chosen for break in? Or am I likely
> > looking at some other problem?  I've also verified the sender is
>correct,
>I
> > swapped it with the one in my 4kq and got the same reading.  Last engine
>I
> > built that required breaking in had more "normal" idle oil pressure, but
>I
> > think I might've used a heavier viscosity break in oil.
> >
> > Thoughts & comments are greatly appreciated,
> > Alan
> >
> > '83 CGT 20vt
> > '90 v8q
> > '86 4kcsq
> >
> > http://www.geocities.com/audikramer
> >
> > _________________________________________________________________
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Alan Kramer
http://www.geocities.com/audikramer

'83 CGT
'85 CGT supercharged project
'86 4kcsq
------------------------------------


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