COMING BACK FROM A TRIP NOTICED OIL PRESSURE GAUGE FLUCTUATING. AFTER CAR WAS PARKED NOTICED OIL WAS LEAKING FROM THE ENGINE. THE OIL SEEMED TO BE COMING FROM THE BACK OF THE ENGINE TOWARDS THE TOP ON THE DRIVERS SIDE. IS THERE AN OIL PRESSURE SENDING UNIT THERE AND IF SO HOW CAN I CHANGE IT?
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