1995 D1 with 3.9 210k miles
Just did the timing cover gasket and oil pump. Initial start up oil pump went out and the oil sensor started to leak and then I lost pressure. I replaced the sensor last week and changed the oil from 10w30 to Rotella 15w40. With this my oil light went out. I had good pressure for about 30 minutes then my oil light would come on under 1100 rpm. Now I have no oil pressure. I?m thinking probably going to need to replace bearings. But I am interested if anybody has a direction that I should look into. Possibly stuck oil pressure relief valve? I haven?t dug into that yet. I am contemplating having the 3.9 rebuilt or swapping to a 4.0. The truck was running fine until the timing cover gasket started leaking.
Just did the timing cover gasket and oil pump. Initial start up oil pump went out and the oil sensor started to leak and then I lost pressure. I replaced the sensor last week and changed the oil from 10w30 to Rotella 15w40. With this my oil light went out. I had good pressure for about 30 minutes then my oil light would come on under 1100 rpm. Now I have no oil pressure. I?m thinking probably going to need to replace bearings. But I am interested if anybody has a direction that I should look into. Possibly stuck oil pressure relief valve? I haven?t dug into that yet. I am contemplating having the 3.9 rebuilt or swapping to a 4.0. The truck was running fine until the timing cover gasket started leaking.