Help needed identifying gaskets
I have a 1997 T444E
I need to replace my water pump gasket (maybe the water pump and thermostat too since I will have it off) . I figured I might as well replace the oil cooler o rings since it looks like they might be starting to leak. There is also a little oil leak that comes from the passenger side I think from the HPOP resivore. I found gasket/seal kit but there are a few items I have no idea what they are for. I am sure someone here knows what the circled items are for.
I recognize the water pump gasket and the oil cooler orings and gaskets. I think I even know the oil resivore gasket (circled in blue).
If you have any suggestions on other preventive things to check/replace while the water pump is off please let me know. I don't know to get stuck on the side of the road somewhere.
Thanks in advance for helpful comments.