Under Pressure About Oil Pressure

[DIRT KILLER]

RECENTLY ACQUIRED THIS CAR FREE,CHRYSLER CONQUEST TSI.
HERES MY PROBLEM START CAR ,ONCE CAR WARMS UP OIL PRESSURE DROPS,LIFTER NOISE,ALSO IF YOU LOOK AT THE ENGINE FROM THE FRONT TO THE FRONT LEFT BOTTOM CORNER OF ENGINE BLOCK THERE IS A PUMP OR COMPRESSOR WITH A LITTLE OIL LEAKAGE IF ANY ONE HAS ANSWERS I WOULD REALLY APPRECIATE IT, DIRT KILLER IN HAWAII