2L oil pump dilemma

[roccophil at gmail.com (Phil Boeye)]

This is a 25k motor that has run excellently.  The OEM pump was pegged at
over 5bar on the VDO gauge around 4K.  The new 30mm pump pegs it around 1800
rpm.  Nothing else has changed with the motor.

The oil is Mobil One 10w30 (from wintertime).

I've lost oil via the old gasket-left-on-the-oilfilter method, draining out
the oil quickly.  The oil warning light comes on, but no buzzer.  This was
the first time I've ever had the light come on and heard the buzzer, too.
No leakage, so this isn't a loss issue.

Since I swapped from a 36mm gear oil pump down to a 30mm gear oil pump, I
assume that is a lower volume oil pump?




On 5/15/06, Allyn <amalventano1@tds.net> wrote:
>
> Phil,
> I'm confused as to what car is giving you a 'high' oil pressure warning (I
> have never heard of such a warning actually), and at what oil pressure is
> it
> giving you this warning? Using a higher volume 2L pump will yield a higher
> pressure on the same engine, everything else being equal, so your result
> is
> somewhat expected. Such a result can also occur by using a lower volume
> oil
> pump with a higher relief setting, provided the engine is in *very* good
> shape (minimal flow past bearings). Is this a new / rebuild? If so, how
> many
> miles were put on it during break-in, and with what oil? I'm just trying
> to
> figure out if your actual pressure is high enough to actually be a bad
> thing.
> Also, what weight and type of oil are you using currently?
> Al
>
>
>