I just got my first car, a 95 integra RS, I got some problems that i need help with, it has 190km on it.

1) The engine coolant does not goto the middle of the gauge, inside it warms up normally and stops at 1/4 instead of the halfway mark. I did a coolant flush, the top hose is hot and the bottom is warm.

2) The injectors are noisey, I guess you cannot fix this one

3) If the valve lash has never been done on this car, would it damage the valve where it is seated

4) Is it possible for this car to never have it's timing belt changed at this KM's? A new water pump is a good idea?