Three things come to mind. The Oil Pressure gauge,Oil Pressure gauge washer/seal,and finally the oil sifter and oil chain.
The Oil pressure gauge has been known to go out. And the seal is good to replace items which are not that expensive.
Now if there is rattling go on or ticking going. I would remove the valve cover and use a l.E.D. flashlight looking at all the plastic guides making sure the side rails are still in tacked and not torn or broken. I would use.
O-Ring Silicone Grease | Super Lube
Using this grease lightly on the valve cover gasket; as to not have to purchase a new one. torquing that down to 7 and 1/2 foot pounds or 100 inch pounds.
After that I would proceed to under the car and drain the oil into a clean container and put them back in empty quart oil
containers or 4 quart oil container; if the oil is still good. Looking at the condition of the oil as it is draining making sure the viscosity and the color of it is standard black and not thin also looking for metallic flakes.
The other two components can be accessed through this area. with the oil pan off I would first look inside the oil pump sump sifter for plastic debris that looks like the plastic timing chain guide pieces. After that I would look at the Oil pump chain a short chain that runs from the crankshaft to the oil pump itself. Checking to make sure it is not too loose. There will be play there of course. Not a serious amount of it more than a say a serpentine belts acceptable limits would be(just something so you don't freak out about the play there). It would be real saggy against the oil pump gear.
Really this inspection has to do with more so with checking the oil pump sump screen for debris.
