You might want to take it to another dealer they might have overlooked something.I did find this bulletin to look at it might help. Some customers may complain of low oil pressure, no oil pressure, and/or engine noise. This may be the result of a sticking oil pump pressure relief valve. In some instances, the customer may experience this intermittently if the valve frees up when the engine cools down.
If the SI diagnosis isolates low mechanical oil pressure, replace the oil pump, flush the oil cooler lines (if equipped), clean the inside of the oil pan, change the oil and filter, and re-evaluate the concern.
Notice: If an engine noise is noticed after replacing the oil pump, follow the SI diagnosis and repair the engine as necessary.
Post back with what you find.
Tuesday, December 30th, 2008 AT 9:45 PM