Low Oil Pressure Mystery

[Grant Lenahan]

sending unit out of calibration?

Grant
On Jul 1, 2011, at 1:28 PM, Douglas Fifield wrote:

> Hedz,
> 
> Patient is an 01 A4 1.8T belonging to my GF.  The car was bought used
> with about 80K on the clock.  It has been throwing low oil pressure
> warnings for some time.  Car needs to be completely warmed up and the
> warning light flickers on periodically for a few seconds and goes off
> - usually when going uphill.
> 
> We dropped the pan expecting to find signs of sludge, but did not.
> What we did find were small, bright, non-magnetic shavings.  We
> theorized that the shavings were being sucked up against the intake
> screen and reducing the oil flow.  Cleaned everything out and buttoned
> up the car.  Problem was not fixed.
> 
> Pulled the valve cover thinking that if aluminum was flaking off
> somewhere, that was the likely place.  All cam bearings look good.  No
> sign of wear.
> 
> The engine sounds good.  No knocks or other unusual sounds.
> Compression is good.  We are puzzled.  Next step is to replace the oil
> pump. Still no idea of where the shavings might have come from.
> 
> What does the collective wisdom of the list say?
> 
> -- 
> Douglas in MN
> 95.5 Audi S//6 Avant
> 08 Prius Touring (50 mph reg)
> 73 BMW R60/5 mit Toaster Tank
> 82 BMW R100S mit Russkie Sidecar
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