Any advice on this? I'm a new owner of a 99 Disco 1 with 180k plus miles. Oil level is fine. Engine temp never gets over 185, and usually stays in the 165-170 realm. But recently the oil pressure light comes on in park and when idling in traffic. I've taken to putting it in neutral and slightly raving the rpm's closer to 1000 when idling in traffic, and this makes the light go off.
I plan on buying a oil pressure testing gauge asap and checking the actual pressure. Other than that should I open up the oil pump and see if anything is cracked?
Otherwise the truck drives fine. The previous owner replaced every hose, gasket and belt under the hood, and added an after market engine temp/load sensor.