The oil pump is greased by hand, so why not oil it on the truck?
This situation may be the engine oil pressure relief phenomenon inside, check that there is a problem, repair it
Hello. Check the line for pressure reliefNormal. Is there any deformation of the oil pan?. Lead to less oil in the oil pump strainer and air. That's why I don't use oilBe sure to check if the oil pan is deformed or notAfter loading, the oil pan is not installed. Put the oil into the oil with the screen below. Move the car to see if there is any oil or pressure relief
This has many aspects: the oil circuit is blocked, the oil pump pressure is not enough, the loading seal is not installed
