Grand Prix V6-3.8L (2007)
6. Remove the four bolts holding the oil filter adapter to the engine front cover.
7. Remove the following components:
*
Oil filter adapter
*
Gasket
*
Oil pressure valve and spring
8. Clean the parts in a suitable solvent. Dry the parts.
9. Clean the oil filter adapter gasket mating surfaces.
10. Inspect the following areas:
*
The oil pressure valve and the valve bore for burrs
*
The spring for loss of tension. Replace the spring if necessary.